General/On-Track Rules

revised 01/02/21

RULE BOOK DISCLAIMER

The rules and/or regulations set forth herein are designed to provide for the orderly conduct of racing events and to establish minimum acceptable requirements for such events. These rules shall govern the condition of all events, and by participating in these events, all participants are deemed to have complied with these rules. No express or implied warranty of safety shall result from publications of or compliance with these rules and/or regulations. They are intended as a guide for the conduct of the sport and are in no way a guarantee against injury or death to a participant, spectator or official.

The race director shall be empowered to permit minor deviation from any of the specifications herein or impose any further restrictions that in his opinion do not alter the minimum acceptable requirements. No expressed or implied warranty of safety shall result from such altercation of specifications. Any interpretation or deviation of these rules is left to the discretion of the officials. Their decision is final.

GENERAL RULES

  1. The rules and/or regulations set forth herein do not express or imply warranty of safety, from publication of, or, compliance with these rules and/or regulations. They are intended as a guide for the conduct and are in no way a guarantee against injury to participants. By entering or competing at the facility, you are agreeing to the terms of these and any other posted rules.
  2. Rule and procedure changes may be made at any time with or without prior notice.
  3. Management reserves the right to reject or allow the entry of any car, driver, or person for any reason.
  4. No intoxicating beverages, narcotics, or illegal substances are to be consumed and/or used during any event, by anyone, entering the racing facility.
  5. Verbal or physical abuse of any official or other entrant on premises, is, strictly prohibited. Fighting on premises at any time will subject offender(s) to possible suspension & ejection.
  6. Officials must be immediately notified of any car or driver change. Any changes will result in the driver and car starting at the tail of the next race they were eligible to start.
  7. Drivers earn starting positions in races, cars do not. If a driver scratches to allow another driver to drive their car, the second driver must have already been eligible for the race they wish to enter.
  8. All decisions of scoring judges & officials are final.
  9. Drivers, owners, and/or crew members have no claims against management or any official due to disqualification or damage to driver or equipment resulting in an altercation arising from unsportsmanlike conduct on behalf of drivers, owners, and/or crew members.
  10. Anyone bringing legal action against the speedway, management, and/or officials will be suspended indefinitely.
  11. Whenever it is deemed dangerous, unsafe, or unjustified to continue any racing event, it may be stopped at any point by the discretion of management.
  12. Per given race night, race cars must claim 1 class only, however, a driver my drive in more than 1 class with certain exceptions.
  13. In all divisions, officials reserve the right to check any car, driver, or hauler at any time for rule violations, including before and after races.  Any driver unwilling, or car unable, to perform the requested inspections is subject to disqualification and/or suspension. 
  14. Every year you must file a completed registration form and an IRS form W-9 filled out and returned to management.
  15. All pit entrants must sign a voluntary waiver & release from liability & indemnity agreement, and pay for and receive an authorized pit pass.
  16. Make absolutely sure you keep your authorized pit pass. In the event of a rain-out. It is the only means by which you will be allowed admittance on the rescheduled date. Your signature on pit sheets, or “don’t you remember me?”, Is not acceptable to gain re-admittance!
  17. Anyone caught illegally entering pits & cannot produce an authorized pit pass will be immediately ejected from track. Management reserves the right to ask for proof of admission at any time. Management also reserves the right to pursue legal action against anyone trespassing anywhere on speedway property.
  18. Pay-off procedure: Only owner and/or driver may pick up any prize monies. Be prepared to show a valid driver’s license or some other form of I.D. If you are asked.
  19. Prize monies left unclaimed over 45 days will become the property of MRP Raceway Park
  20. The management reserves the right due to inclement weather conditions and/or any unforeseen conditions, to make changes in the posted pay-off structure. You will be notified as soon as possible if this condition arises.
  21. Raceceivers are mandatory in all divisions at all times.
  22. A scoring transponder is required on all cars at all times.
  23. Any ties in championship points will be considered a tie with the two(or more drivers) splitting any cash prizes evenly. Any ties for prizes or provisionals that cannot be split will be determined by coin flip held by Management.
  24. Due to insurance regulations, 4 wheelers are only permitted in the pit and infield area. They are NOT allowed in the parking lots or any other areas of the track. Also, 4 wheelers may only be operated by persons 16 years of age or older.
  25. Provisionals: Provisional starters may be added to certain events as decided by speedway officials. Drivers are eligible for one Speedway provisional per racing season. Once they have used their provisional start, they are not eligible for any further provisionals that season. Provisional starters will be chosen using attendance and the current point standings in that division. To be eligible for a provisional, a driver must have been present and have attempted to compete at every event, INCLUDING NON POINTS RACES, in their division during the season in question. The highest driver among eligible drivers in the point standings at the beginning of the event will be given first choice to use their provisional. If they choose not to use it, they retain the use of their provisional for another event and the provisional choice will move to the next eligible driver. In the event of a tie in points, a coin flip will determine first choice. Drivers can miss one race and still be eligible for a provisional, however, they cannot compete at another track on the same night as the event they missed. Any driver wanting to use the one race exemption to this rule must inform management at the next event after the missed event. Also, any drivers using the one race exemption will be given the option to use a provisional an an event only after all perfect attendance drivers have either used or passed on their provisional. Certain events may require modification of the provisional rules.

SAFETY EQUIPMENT

Safety equipment specifications listed below are listed as a guide and are only a minimum standard. These minimum standards may not be sufficient enough to protect a driver from injury or death from some incidents. It is the responsibility of the driver, car owner, and crew to ensure that the safety equipment on the car is properly installed, working as intended, and is sufficient to protect the driver from any incidents that occur. This may include using safety equipment that goes above and beyond the minimum specifications and recommended equipment listed below. 

  1. Batteries:
    1. NO batteries to be located in the drivers’ compartment/cockpit.
    2. The battery must be securely mounted with positive fasteners and brackets.
    3. The battery terminals must be insulated or enclosed with a non-conductive material that will prevent contact with any part of the race car should the battery become dislodged from the battery mount.
    4. One (1) mandatory battery disconnect switch must be installed on the rear deck, behind the driver seat, in a location that is easily accessible from outside the race car. The switch must be clearly labeled with off/on direction. The switch must be directly in-line with the NEGATIVE battery cable and be capable of completely disconnecting the NEGATIVE terminal of the battery from the race car. Negative or “ground” wiring connections must not be made anywhere from the battery negative terminal to the input side of the disconnect switch. An additional battery disconnect switch within the driver’s reach may also be used 
  2. Seats:
    1. Full containment type seats constructed of aluminum to the general design specifications of SFI 39.2 standards are highly recommended. Design should include comprehensive head surround, shoulder and torso support system, energy impact foam, and removable head foam.
    2. Up fitting a current seat with bolt on kits will be permitted with a seat manufacturer produced kit and a base seat acceptable to the seat manufacturer. Components should include comprehensive head surround, shoulder and torso support system, energy impact foam. Must be installed in accordance to seat manufacturer’s instructions. 
    3.  Seats must be used as supplied and instructed by the seat manufacturer with the exception of trimming the length of the left side head surround for the purpose of egress only. If the left side head surround is trimmed to a distance that is less than the most forward surface of the drivers helmet (usually the area crossing the chin) then a left side head net meeting the SFI 37.1 must be installed with a quick release latch.
    4. Seats must be mounted to a seat frame that is welded to the race car frame/roll cage structure. Attaching points, angles, and materials for the seat frame and mounting of the seat to the seat frame must be in accordance to the seat manufacturer’s instructions.
  3.  Restraints:
    1. The use of a 5, 6 or 7 point driver restraint system certified to SFI Spec 16.1 or 16.5 is REQUIRED no exceptions. All driver restraint systems shall not be in excess of 3 years of age past the date of manufacture. The use of a 7 point driver restraint system is strongly recommended. All mounting points of the racing harness MUST be mounted properly in accordance with the manufacturer’s instructions, and securely mounted to the chassis with the use of grade 5 or better hardware.
  4. Window Nets:
    1. Window Nets certified to SFI Spec 27.1 are highly recommended and must be mounted in accordance with the manufacture’s instructions and technical director’s satisfaction.
  5. Driver Worn Equipment:
    1. A helmet certified to Snell SA2010/FIA-8860, Snell SA2015/FIA-8860, SFI 31.1/2010 or SFI 31.1/2015 is REQUIRED.
    2. A driver suit certified to SFI Spec 3.2A/5 is REQUIRED.
    3. Gloves certified to SFI Spec 3.3/5 are REQUIRED.
    4. Socks and Shoes certified to SFI Spec 3.3 are REQUIRED.
    5. Head and Neck Restraint Devices/Systems are Highly Recommended
    6. At all times during an Event (practice, qualifying, and competition), drivers must connect their helmet to a head and neck restraint device/system certified to SFI Spec 38.1. The device/system must display a valid SFI Spec 38.1 label.  The head and neck restraint device/system, when connected, must conform to the manufacturer’s mounting instructions, and must be configured, maintained and used in accordance with the manufacturer’s instructions
  6. Drive Line:
    1. A driveline “sling” is REQUIRED.
  7. Cockpit Tubs:
    1. Eighteen (18)-gauge steel or one and one-eighth inch (1 1/8″) aluminum “cockpit tub” to protect front, sides and rear of driver is HIGHLY RECOMMENDED.
  8. Fire Suppression:
    1. An in-car Fire Suppression system is Highly Recommended.
    2. All race cars should be be equipped with a thermally deployed automatic fire suppression system. The fire suppression system will consist of a DOT approved cylinder manufactured from aluminum or steel with a capacity of ten (10) lbs. of fire extinguishing agent, steel or steel reinforced lines, and two (2) thermally activated discharge nozzles.
    3. All systems must meet or exceed SFI 17.1 specifications.
    4. Systems must be fully charged with ten (10) lbs. of DuPont FE-36, 3M NOVEC 1230, or Fire Aide and display a legible and valid SFI and manufacturer label depicting fire extinguishing agent, capacity, and certification date. Cylinders that or beyond useful certification date must be inspected, serviced and re-labeled by the manufacturer.
    5. Cylinders must be mounted forward of the fuel cell. Cylinders must be securely mounted to the frame/roll cage assembly. The certification label must be unobstructed and easily accessible for inspection when the mounting is complete.
    6. The cylinder must be connected to the nozzles with steel or steel reinforced lines.
    7. Two (2) thermally activated nozzles must be used. One (1) nozzle must be located directly above the fuel cell in the fuel cell area and the second nozzle must be located in the driver cockpit area.
    8. An optional manual override cable may be added to the system.
  9. Drivers under the age of 18 are REQUIRED to have a HEAD SOCK, window net, gloves, and either a neck collar or a head and neck restraint system in addition to all other required safety equipment in place.

ON TRACK RULES

  1. Working on cars, on track, is prohibited.
  2. No one except drivers, their cars, & track officials are allowed on track after racing begins.
  3. Any car pitting under yellow or red flag conditions will automatically go to the tail position.
  4. If you stop on the track, you go to the tail. This includes the initial start. Stopping at an official under yellow flag conditions for certain safety reasons is allowed. (Note: If a Red Flag or completely blocked track situation occurs, officials reserve the right to revert to previous lap or initial start.)
  5. Officials reserve the right to penalize drivers that either directly cause or intentionally cause a cautions. If officials determine that a driver intentionally caused a caution, officials may disqualify the driver for the night.
  6. Any car causing 2 cautions in a single race will be black flagged.
  7. Anything dragging or hanging on a car that is determined unsafe will cause that car to be black flagged.
  8. You may enter the infield at any entrance. YOU MAY NOT RE-ENTER THE TRACK DURING GREEN FLAG CONDITIONS. You must wait till the next caution to re-enter the track. During “one to go” caution conditions, cars must re-enter behind the field.
  9. After receiving the checkered flag, cars are to slow down and exit the track on backstretch , if scaling inter scales off turn 4 then exit off of turn 3. DO NOT stay in the throttle after checker flag.
  10. Anyone jumping the start will be given one warning. Second offense will result in a one row penalty.
  11. On the third complete restart of any race, that is not the result of someone jumping, the field may be put in single file order.
  12. Passing before the cone, hitting the cone or going under the cone will result in offending car going to the tail of the field.
  13. If a car leaves the track during race that car is not permitted to re enter race,  except in feature car is to aloud to pit off of turn 4 and return to race before green flag is dropped. You are not aloud to exit track in backstretch during green flag.

Late Models Rules

Note: as we try to match rules with national series as much as possible, these rules are subject to change at any time. 

RULE BOOK DISCLAIMER

The rules and/or regulations set forth herein are designed to provide for the orderly conduct of racing events and to establish minimum acceptable requirements for such events. These rules shall govern the condition of all events, and by participating in these events, all participants are deemed to have complied with these rules. No express or implied warranty of safety shall result from publications of or compliance with these rules and/or regulations. They are intended as a guide for the conduct of the sport and are in no way a guarantee against injury or death to a participant, spectator or official.

The race director shall be empowered to permit minor deviation from any of the specifications herein or impose any further restrictions that in his opinion do not alter the minimum acceptable requirements. No expressed or implied warranty of safety shall result from such altercation of specifications. Any interpretation or deviation of these rules is left to the discretion of the officials. Their decision is final.

BODIES

  1. Nosepiece and roof must match body style of car.
  2. All cars must have a minimum of one half inch (1/2”) and a maximum of two (2”) inches of roll at top of fenders, doors, and quarter panels. A sharp edge or angle will not be permitted. Body roll must go from sides over interior, not interior over sides.
  3. Floorboards and firewall must cover the driver’s area and be constructed to provide maximum safety.
  4. Driver’s seat must remain on the left side of the drive line.
  5. Front window bars are mandatory.
  6. Legible numbers, at least eighteen inches (18”) high are required on each side of the car and roof.
  7. No fins or raised lips of any kind are permitted anywhere along the entire length of the car.
  8. Right side body line must be straight from front to rear with a one inch (1”) tolerance up and down, left and right.
  9. No “slope noses” or “wedge cars” permitted. Noses must be stock appearing, subject to template.
  10. No “belly pans” or any type of enclosure on bottom of cars will be permitted. Skid plate to protect oil pan is permitted.
  11. No wings or tunnels of any kind are permitted underneath the body or chassis of the car. A maximum of one (1) stone deflector, for rear mounted oil pumps, oil filters, and for the main oil tank will be permitted. The deflector may be made of steel, aluminum, or heavy gauge wire. Can run from rear of motor mount to in front of the forebar brackets not to cover bracket. Not to be above the top frame rail. Not to exceed below the bottom frame rail
  12. All body panels must be solid. No holes, slots, or air gaps are permitted. NACA ducts or NACA style ducts are not permitted. One hole for interior (deck) mounted oil cooler is permitted. 
  13. All non-approved bodies or any section/s of the body can or will be assessed a fifty pound (50#) minimum weight penalty at the discretion of the Technical Director.
  14. No panels of any kind under the rear deck running from the front to the rear of the car. Bracing from fuel cell top from front to rear is legal.
  15. Any air cleaner scoops used must be positioned in front of or around the air cleaner and cannot exceed one (1”) inch in height above any part of the air cleaner. The scoop cannot be designed with fins or raised edges to direct airflow. The scoop cannot extend behind the rear of the air cleaner and must have a maximum width of seventeen inches (17”) at the rear, with a maximum of ten inches (10”) width at the front and cannot have more than one inch (1”) opening in height at the front.
  16. No cockpit or driver adjustable shocks, hydraulic or pneumatic weight jacks, trackers, MSD boxes or similar adjustable components of any kind are permitted inside the cockpit of the car. Taping over of any adjuster is not permitted. The offending component must be removed from the cockpit.

STOCK NOSEPIECES

  1. All stock nosepieces must be approved.
  2. Nosepieces must be made of molded type material.
  3. Two (2) piece noses must be fastened together in the center. No spacers to gain width or cutting to narrow overall width are permitted.
  4. The nose must be mounted flat where filler panel and nose piece meet. The nosepiece must be mounted so as not to alter its original shape. Nose piece will checked with a template. Nose will be pushed against mounting supports to gauge its profile against template.
  5. Adding to the bottom of the OEM valance to achieve lower ground clearance is not permitted.
  6. A stock nosepiece can extend a maximum of fifty-two inches (52″) from the center of the front hub to the farthest point extending forward. (1” Tolerance)
  7. Front fender flairs must be made of plastic and cannot alter the original shape of the nosepiece. The front fender flairs cannot extend beyond the front tire more than one inch (1″) in width with wheels pointed straight.
  8. Front fender flairs must have collapsible support.
  9. Front fender flairs can extend a maximum of three inches (3”) above the fender tops and hood.
  10. Front fender flairs can extend a maximum of four inches (4”) above where the filler panel meets the hood.
  11. The nosepiece must have a headlight decal package attached. One warning will be permitted and then the car must run contrasting color tape in the shape of a headlight.
  12. Holes for cooling purposes must be in the center area (in front of the radiator) of the nose and/or valance.

ROOF AND ROOF SUPPORTS

  1. The roof length size must be a minimum of forty-four inches (44″) to a maximum of fifty-four inches (54″).
  2. The roof width size must be a minimum of forty-eight inches (48″) to a maximum of fifty-two inches (52″).
  3. Roof must be stock appearing and mounted directly to roll cage with no spacers.
  4. Roof height must be between forty-five inches (45”) and forty-eight inches (48”) from the ground.
  5. The roof must be mounted parallel to body and near center of the car.
  6. A maximum one and one half inch (1.5”) roll, turned downward, is permitted along the front edge of the roof. A maximum one-inch (1”) ninety-degree (90°) bend is permitted along the rear edge of the roof. (Roll permitted to help strengthen roof).
  7. All roof side (sail) panels must extend to the edge of the body. Maximum (no tolerance) right side sail panel size – seventeen inches (17”) at the top, forty-three inches (43”) at the bottom. Maximum (no tolerance) left side sail panel size – seventeen inches (17”) at the top, forty-three inches (43”) at the bottom and minimum fifteen inches (15”) at the top, forty inches (40”) at the bottom. The window area may be covered with clear Lexan or transparent material. Both roof support openings must be covered or both must be left open, if left open the openings must maintain a border frame of 2-3”at the top and sides and 3” at the bottom. Decals will be permitted but must meet the dimensions in the drawing and must be approved by the Technical Inspector. Maximum two-inch (2”) bow in either direction in rear roof side panels is permitted.
  8. Sail Panel Windows Openings must be a border frame of 2­-3”at the top and sides and 3” at the bottom with no tolerance.
  9. All cars must have a minimum of three inches (3”) and a maximum of four inches (4”) between sail panel and spoiler side where they meet the deck.
  10. Front posts must be flat and in uniform width from top to bottom – four inch (4”) maximum width. Left and right sides must match in size.
  11. Any sun shields, four inch (4”) maximum, must be able to hinge for easy exiting of car.

FRONT FENDERS AND HOOD

  1. Hood can drop one inch (1”) with a one inch (1”) tolerance measured at the back edge of the hood and in front of the carburetor from left to right side of car. Fenders must taper from outer edge to hood in a straight line. Fender material must be flat with no bubble. Fender top must have ten inch (10”) minimum width.
  2. Fenders are not permitted to gain height from rear to front of car. Will check with a string from the top of the quarter panel at the spoiler to the top of the highest point of the fender. Must be flat (1” tolerance)
  3. No part of fender or hood can be outside of the bodyline.
  4. The front fender can be a maximum of thirty-six inches (36”) in height with a one inch (1”) tolerance. Height is measured vertically from the ground to the top of the fender behind the front tires.

DOORS

  1. Door to door cannot exceed seventy-seven inches (76”) in width at the top of the doors. (1” tolerance)
  2. Door to door cannot exceed eighty- nine inches (89”) in width at the bottom in the center of the car.
  3. At no point can the door sides break in towards the center of the car between the top and bottom measurements. One inch (1”) tolerance including plastic.
  4. The minimum ground clearance permitted is three inches (3”).

QUARTER PANELS

  1. Quarter panel can be a maximum of forty-nine inches (49”) from center of rear hub to rear edge measured horizontially. Quarter panel can be a maximum of fifty-four inches (54”) from center of hub to rear t-bar at spoiler with no tolerance.
  2. Tire clearance from body must be a minimum of two inches (2”). No wheel skirts permitted.
  3. At no point can quarter panel sides break in towards center of the car between the top and bottom. One inch (1”) tolerance including plastic.
  4. Right side quarter panel must be straight in line with the door. Will check with a string from the top of the quarter panel at the spoiler to the top of the highest point of the fender. Must be straight with a one inch (1”) tolerance.
  5. Left rear quarter panels must extend downward from the deck a minimum of thirty-three inches (33”) and a maximum of thirty-six inches (36”) including the plastic. Measured at the front and rear of the quarter panel. Right rear quarter panels must extend downward from the deck a minimum of twenty-seven inches (27”) without the plastic and thirty-one inches (31”) with plastic. Measured at the front and rear of the quarter panel. One inch (1”) tolerance.

DECK HEIGHT

  1. The maximum height from the ground to the top of the rear deck at the top of the rear quarter panels (spoiler hinge bottom) is thirty-eight inches (38”).One inch (1”) tolerance.
  2. Deck height will be messured with the nosepeice splitter at a maxium height of fithteen inches (15”) with no tolerance from the ground to the top (highest point) of the splitter.
  3. Cars with a factory sealed GM CT525 will be given an additional two inch(2″) deck height tolerance.

FRAMES

  1. No aluminum frames or bumpers permitted in construction of car.
  2. Minimum 103” – Maximum 105” wheelbase.
  3. Rectangle or Square Tubing:
    1. The frame of all cars must be constructed of two inch (2”) by two-inch (2”) minimum rectangular or square tubing with a minimum of eight inch (8”) circumference and a minimum of eighty-three thousands inch (.083”) wall thickness.
  4. Round Tube Frame:
    1. The frame of all cars must be constructed of a minimum of one and three-quarter inch (1¾”) round tubing and must have a wall thickness of eighty-three thousands inch (.083”) wall thickness minimum.
  5. If rear bumper is stubbed, it may only extend a maximum of eight inches (8”) beyond frame. Any stubbed rear bumpers that extend eight inches (8”) or more beyond frame must be rounded and directed towards the front of the car.
  6. It is recommended that all cars be equipped with a tow hook or strap.
  7. All battery supports must be braced in two axis – two horizontal and one vertical.
  8. All frame and chassis components must be welded or bolted together. No sleeves, slip couplings. etc.

ROLL CAGES

  1. Cars must have a suitable steel roll cage in drivers’ compartment including headrest.
  2. Side roll bars are mandatory and must extend into the door panels.
  3. A minimum of three (3) bars must be used on the left side of the car. Each bar must be a minimum of one and one-half inch (1½”) in diameter with a minimum thickness of ninety-five thousands inch (.095”).
  4. Roll cage must be welded to the frame.
  5. Roll cage must be above the drivers’ helmet. 8” minimum between floor pan and the bottom of the roll cage
  6. No “fin-shaped” or “foil-shaped” add-ons permitted on any part of the roll cage. The entire roll cage must be constructed of round tubing only.
  7. Roll cage padding certified to SFI Spec 45.1 is required anywhere the driver’s helmet may contact the roll cage while in the driving position.

Driver Side Intrusion Plate

  1. Driver side intrusion plate(s) will be mandatory for all perfect attendance drivers on August 1st, 2018. All other drivers will receive three (3) full weekends grace period before required compliance. Perfect attendance drivers with intrusion plates will receive a 50 point bonus at the first race after August 1st, 2018.
  2. A mininum 1⁄8 inch (.125”) thick sixteen inch (16”) x twenty-six inch (26”) magnetic steel intrusion plate on the driver’s side door bars is mandatory
  3. Approved installations:
    1. Direct Welded/Individual Plates
      1. Individual plates between door bars are permitted but must be welded around the perimeter.
    2. Welded Tabs/Bolt on Plates
      1. Intrusion plate must be bolted to fabricated 1⁄8 inch (.125”) magnetic steel tabs, welded securely to the chassis, using a minimum of eight (8) x 3⁄8 inch Allen button head bolts.
      2. A minimum of three (3) fabricated 1⁄8 inch (.125”) magnetic steel tabs and 3⁄8 inch Allen button head bolts required across top of the intrusion plate. A minimum of three (3) fabricated 1⁄8 inch (.125”) magnetic steel tabs and 3⁄8 inch Allen button head bolts required across the bottom of the plate. One (1) fabricated 1⁄8 inch (.125”) magnetic steel tabs and 3⁄8 inch Allen button head bolt in each in the middle front and middle rear of intrusion plate.
    3. Door Bar Clamps/Bolt on Plate
      1. Intrusion plate must be bolted to a minimum of six (6) approved-design door bar clamps using the included twelve (12) x half-inch (0.5”) Allen button head bolts per the manufacturer’s specification.
      2. A minimum of three (3) approved-design door bar clamps and the included six (6) x half-inch (0.5”) Allen button head bolts required across top of the intrusion plate and three (3) approved-design door bar clamps and included six (6) x half-inch (0.5”) Allen button head bolts required across bottom of intrusion plate

INTERIORS

  1. Interior is permitted to be dropped to the middle (just behind the seat) of the car a maximum of five inches (5”) below the top of doors and a minimum of twelve inches (12”) below the roll cage.
  2. Interior must be fastened flush at the top of the door and quarter panels and must taper gradually towards the center of the car. Maximum of seventy degree (70°) angle from the deck.
  3. Interior must run in a straight line from behind the drivers’ seat to the rear spoiler.
  4. Interior (deck) must run in a straight line across the back of car at the spoiler.
  5. All interiors must be made of aluminum.
  6. If interior is flat through the car, it must maintain a twelve-inch (12”) clearance from roll cage for easy exiting from either side of the car.
  7. Cowl (driver protection) panels in front of the driver may have a maximum of three inches (3”) in height. The cowl panel must taper to the deck or end in line with the steering wheel.
  8. If interior is dropped at firewall/back of hood, that portion of the firewall must be filled in vertically with aluminum. Interior may be dropped a maximum of two inches (2”) from the top of the hood.

SPOILER

  1. Rear spoiler must be manufactured of material of adequate strength such as Lexan, Aluminum, or Carbon Fiber.
  2. Rear spoiler material maximum eight-inch (8”) height measured from deck to tip of material. Maximum seventy-two inch (72”) width between outer edges of spoiler sides.
  3. Rear spoiler is not permitted to be suspended above the deck to create a “wing effect.”
  4. Rear spoiler must begin where quarter panels end. No extended decks permitted.
  5. Maximum of three (3) rear spoiler supports. Option of two (2) additional one-inch (1”) aluminum braces.
  6. Spoiler supports cannot be mounted wider than the top of the quarter panel.
  7. Spoiler must be straight (vertical and horizontal) where it mounts to interior (deck) panels.

ENGINES

  1. Engines must be based on a factory design and must be naturally aspirated. Aluminum or steel blocks permitted.
  2. No fuel injection devices, electric fuel pumps, turbo chargers, or blowers permitted.
  3. Magnetos are permitted. However, the engine must have an operating self-starter.
  4. The engine may be set back a maximum of (25 1/2”) from the center of ball joint to back of the block.
  5. Carburetor is limited to one four barrel.
  6. All engines are limited to one spark plug and two valves per cylinder.
  7. No engines using coil packs are allowed. Engine must operate using a single distributor. No distributor-less engines allowed.
  8. The GM CT525 engine is allowed.
    1. The engine must have the flat top “Signa-Key” Type seals. Engines with the older dome type break away seals, engines that have ANY other seal, or engines with no seals will be considered an open engine and must comply with all open engine rules.
    2. Cars with factory sealed CT525 engines will be given a 100 lb weight allowance.
    3. Cars with factory sealed CT525 engines will be given an additional 2″ deck height tolerance.
  9. A harmonic balancer certified to SFI Spec 18.1 is required.
  10. No overhead cam engines.

FUEL SYSTEMS

  1. An approved fuel cell (32 gallon maximum) must be securely mounted in the trunk area of the car inside a 20-gauge metal box supported by two (2) 1/8 x 2″ steel straps.
  2. The following fuel cell rules are MANDATORY:
    1. The only fuel cells that are approved are those that meet and/or exceed the FIA / FT3 or SFI 28.3 specifications.
    2. Fuel cells must be used in accordance with the FIA / FT3 or SFI 28.3 specifications. Alterations of any kind will not be permitted. (Example: alterations to top plate, alterations or removal of foam, etc.)
    3. Fuel valve plate, fuel pickup and fuel return fittings must be on the top of the fuel cell.
    4. Fuel cells that are not contained within a welded steel tubing “rack” must have two (2) equally spaced steel straps that measure two (2) inches wide by 1/8 inch in thickness that completely surround the fuel cell. The straps must be bolted to the frame. Longitudinal (front to rear) orientation is recommended for strap mounting.
  3. A firewall must be installed between the fuel tank and drivers’ compartment.
  4. Gasoline or Alcohol only. Nitrous gases or other nitrate additives are not permitted.
  5. Willy’s Carburetor roll over plate part # WCD4000 is approved for competition.
  6. Fuel Cell Can must be sixty thousandths (.060) aluminum or twenty (20) gauge steel.
  7. Caps must be threaded on. No twist on d-ring caps.

STEERING COMPONENTS

  1. One mechanical power steering pump permitted. Electronic steering components are not permitted.

CHASSIS

  1. No titanium chassis or suspension components
  2. No titanium fasteners

TRANSMISSION, CLUTCH AND REAR END

  1. Any transmission with working reverse and working forward gears is permitted.
  2. Manual transmission must be equipped with an operational clutch.
  3. Automatic transmissions are permitted.
  4. The transmission must be mounted to the rear of the engine and lead to one drive shaft.
  5. No “live-axle” rear-ends are permitted.
  6. No independent rear suspensions are permitted.
  7. All axle housings using a cable to lock-in the rear-end must have the cable mounted outside the cockpit area and not in reach of the driver.
  8. The axle housing must be of the “closed tube” design utilizing “full floating” magnetic steel axle shafts.
  9. The center section of the axle housing must be manufactured of either aluminum or magnesium.
  10. Axle tubes must be one (1) piece. Axle tubes must be manufactured of aluminum or magnetic mild steel. Axle tubes manufactured of exotic heavy materials (ex: tungsten) will not be permitted. The outside diameter of the axle tubes must not exceed three (3) inches. Axle tube internal inserts or external sleeves will not be permitted. The addition of any ballast weight to the axle housing will not be permitted.

DRIVE SHAFTS

  1. All drive shafts must be a minimum of two inches (2”) in diameter. All drive shafts must be painted silver or white.
  2. Only one drive shaft is permitted.
  3. The drive shaft must be protected with a secure drive shaft hoop or sling.

TIRES

  1. Tire Rule
    1. The Late Model Tire Rule will allow ONLY the following tires:
      1. Any Hoosier tire 1300 softest 
      2. Any LM 20-30-40
  2. Largest permitted tire is twenty-nine inches (29″) by eleven inches (11″) by fifteen inches (15″).
  3. Maximum circumference permitted is ninety-three inches (93″).
  4. Maximum cross section width permitted is sixteen and three-quarters inches (16 ¾”).
  5. Hoops for inspection must pass over tire freely.
  6. All sidewall markings must visible at all times. No buffing or removing of the compound designations.
  7. Any chemical treating of tires is illegal.
    1. Officials reserve the right to check and or confiscate any tire used in competition at any time. A driver is fully responsible for any tire used in competition regardless of the source of the tire and/or when the tire was put on the car.
    2. Officials can take tire samples using two methods.
      1. Officials can remove samples using destructive methods. In this case, no tires will be returned regardless of results. Drivers with treated tires will receive no compensation. Drivers with untreated tires will have the tire replaced.
      2. Officials can remove sample grooves from the tread of the tire. No compensation will be given to the driver for tires.
    3. Any tire used in competition may be protested for chemical treating by any driver competing in that same individual event(same feature, heat, qualifications, etc). Protest must be made to track officials prior to when the protested car returns to pit area. Protester must present $500 cash to official at time of protest.
      1. If tire is found to not have been treated, the protested driver will receive $150 for tire replacement even if destructive methods are not used.
      2. If tire is found to be treated, protester will receive $400 of their fee back with $100 being held for processing fees.
    4. All prize monies of drivers with tires taken for testing will be held until lab tests are received. If tire samples do not match the factory benchmark for that compound, the driver forfeits all monies won that night, not only those from the specific race where the driver was protested. (ie – A driver using a tire during qualifying that is found to be illegal will forfeit any monies won in heats, consis, or features that night.)
    5. Drivers with tires that do not match the factory benchmark will be disqualified for the event the samples were taken, be suspended 5 races, lose all championship points earned up to that point, be disqualified from any contingency programs for that season, and be subject to a $1,000 fine. These penalties are for a driver’s first offense. Further offenses will be handled on a case by base basis.
    6. Any driver refusing to submit tires for any testing or intentionally avoiding officials attempts to secure tires will be subject to the same penalties as those found using chemically altered tires.
    7. Any driver making a protest then backing out of protest may be subject to fines, suspensions, and/or other penalties.

WHEELS

  1. Only Aluminum wheels will be permitted.
  2. Wheels must be mounted with lug nuts: no knock-off mounting devices are allowed.
  3. Maximum wheel width is fourteen inches (14”).
  4. Maximum width outside of front tires is ninety inches (90”).
  5. Maximum width outside of rear tires is eighty-eight inches (88”).
  6. Only approved wheel discs will be permitted. Approved wheel discs are wheel discs that are fastened to the wheel using a minimum of three (3), 1/4 or 5/16 inch diameter magnetic steel hex head bolts. The use of wheel discs with any other type of fastener will not be permitted.
  7. Only aluminum wheel spacers will be permitted.
  8. The combined weight of the wheel, wheel hardware, wheel disc and fasteners, and tire must not exceed 40 pounds*. *The maximum combined weight in this rule is based upon current tire rules and may need to be adjusted in the event of an alternate tire.
  9. Bleeder valves of any kind are not permitted.

BRAKES, BRANK COMPONENTS, WHEEL HUB

  1. Must be equipped with sufficient four (4) wheel braking system.
  2. On track three wheel braking is allowed.
  3. Brake rotors must be manufactured of magnetic or stainless steel. No titanium or carbon fiber brake rotors are permitted.
  4. Brake rotors must be used as produced by the brake rotor manufacturer.
  5. Brake calipers must be manufactured of aluminum.
  6. The brake caliper including brake caliper pistons must be used as produced by the brake caliper manufacturer.
  7. Wheel hubs must be manufactured of aluminum or magnesium.
  8. Wheel hubs must be used as produced by the wheel hub manufacturer.
  9. The combined weight of the wheel hub, wheel bearings and seal, spindle nut and washers, brake rotor and attaching hardware, the axle cap, and the wheel spacer must not exceed 27 pounds.

SHOCKS & SPRINGS

  1. Shocks must be constructed of aluminum or steel. Canister shocks are permitted.
    1. The only external connection allowed to the shock is a single hose to a single remote canister with the option of a compression adjuster in the canister.
    2. Compression adjuster and/or canister cannot be mounted within the reach of the driver.
    3. Maxium shock body outside diameter is two (2), half-inch inches (0.50”)
    4. Maxium front shocks lengh is twenty one inches (21”). Messured center to center of the shock eyes.
    5. Maxium rear shocks lengh is twenty seven inches (27”). Messured center to center of the shock eyes.
  2. No cross connected shocks are allowed.
    1. The only external connection allowed to the damper is a single hose to a single remote canister with the option of a compression adjuster in the canister.
    2. Compression adjuster and/or canister cannot be mounted within the reach of the driver.
  3. No “Rod­ Through” designs are allowed.
    1. “Rod­Through” shocks are defined as those shock absorbers in which the piston rod protrudes from both ends of the shock body.
  4. No Inerters are allowed
    1. No rotating parts inside the damper.
    2. No Inerter style dampers, either mechanical or hydraulic, or other type of primarily acceleration sensitive damping devices not permitted.
  5. No Electrical adjusted or active dampers are allowed. No electrical wires, transmitting or receiving components will be allowed to be attached internally or externally to the dampers or mounted inside any component or dampers. No portion of the racecar including and not limited to ­ shocks and spring components or chassis components may have the ability to communicate transfer/transmit/receive any type of digital or analog data or any language and or adjust or monitor in any way whatsoever including but not limited to a variation of a wireless remote device/phone/computer/tablet/ipad or a mechanical remote device.
  6. Any new chassis design or component designs pertaining to and/or but not limited to shock absorber mounts must be approved before they will be permitted for use in competition. Manufacturer and/or competitor may be required to disassemble for complete inspection before in­statement of new part is permitted.
  7. Springs must be made of steel. Torsion bars are not allowed in rear.
  8. Coil springs must be steel. Leaf springs may be composite or steel.
  9. Spring preload adjustments for coil springs must be made using mechanical adjusting nuts on the shock body.
  10. Spring preload adjustments for leaf springs must be made using a mechanical adjusting device such as an adjustable shackle or threaded rod type mount.
  11. Other than spring dampening by the shock absorber, hydraulic, pneumatic, or electrically controlled adjusting devices, (static or dynamic) that affect spring preload or race car heights will not be permitted.
  12. Shock Locations
    1. Only one shock per wheel is permitted at the left front, right front, right rear corners.
    2. Left rear must have one shock behind the axle tube and may have one traction (dummy) shock on the front side o r top of axle tube. Must mount vertically to the birdcage or clamp bracket.
    3. One 5th Coil Shock permitted.
    4. One 90/10 optional shock may be mounted above lift arm on upper lift arm plates. Must be mounted towards the front of the car lying parallel with the car. Shock must mount within 3” of the centerline of the rear ends center section.
  13. One (1) drop chain (limiting chain) is permitted. Must mount vertically from the frame to a bracket on the birdcage to axle tube. Bracket on the axle tube can have a bearing or clamped solid.
  14. All bump stops and/or springs must be mounted on a shock with the exception of a left rear drop chain assembly, 6th coil assembly and/or lift arm assembly. No bump sticks are premitted.
  15. Suspension covers are not allowed. Rear covers on racecar are not allowed outside of your pit area. Spring and/or shock covers are permitted, but must be fastened directly to the spring or shock.
  16. A Swing Arm and/or Z Link suspension is permitted as long as the Top and Bottom solid links are mounted on hiems and run in the opposite directions of the bird cage. The Shock on a Swing Arm or Z Link rear suspension may mount to the bird cage or the bottom radius rod.

SUSPENSION COMPONENTS

  1. Any new chassis design or component design and or technology pertaining to and/or containing suspension must be approvedbefore they will be permitted for use in competition. Manufacturer and/or competitor may be required to disassemble for complete inspection before instatement of new part is permitted.
  2. Suspension and/or rear end parts can be made of steel or aluminum. Aluminum mounting brackets are permitted.
  3. Frame and/or suspension mounts must be welded or bolted solid to the frame and not move. ie­ Floating, sliding, pivoting and/or rotating mounts and/or brackets of any sort are not allowed.
  4. Bolted components must match the correct bolt size with the hole (for instance no 3/8 bolts in a 1/2 inch hole will be deemed illegal) and be torqued to a min of 40 foot pounds per inch
  5. Rear Suspension Mounts.
    1. All mounts must be double sheer
    2. Double sheer mounts must be 1/8” minimum steel and/or 1/4” minimum aluminum.
    3. Sheer mounts must use minimum 5/8” rod ends with minimum 1/2” grade 8 bolts only. The bolt must be bolted through both sheer mounts.
    4. Double sheer mount must be no wider than 4 inches with a minimum 1/2” inch grade 8 bolt with steel or aluminum spacers only.
  6. Only one (1) mechanical traction device is permitted. Only one (1) pull bar or one (1) lift arm is permitted. No other options are allowed. Covers of any sort in any relation to the lift arm or pull bar are not allowed.
  7. Lift Arm & Pull Bar
    1. Floating, pivoting and/or rotating mounts and/or brackets of any sort (connected to and/or associated with the pull bar or lift arm) are not allowed.
    2. Lift arm is defined as a steel or aluminum triangulated bar that is connected at the top and bottom of the rear end housing, extending forward where it is connected to a shock, shock­spring coil­over combination and a limiting chain. One stabilizer bar is permitted to locate the front of the lift arm from left to right in the car.
    3. 6th coil or braking spring assemblies are permitted, must be in front of 5th coil shock.
    4. Pull bar is defined as a continuous assembly that is connected to the top of the rear end and extends forward to a solid mounting point located on the chassis. The mounting location at both the front and rear of the pull bar may be adjustable but must remain constant during competition (cannot be adjustable from the cockpit).
  8. Radius Rods
    1. All rear suspension radius rods must be of a fixed length. No hydraulic cylinders, torsion bars, bump rods, spring rods, slider rods or shock­type radius rods are permitted
    2. The only materials used to fabricate attaching (radius) rods that will be permitted are magnetic steel or aluminu
    3. Aluminum attaching (radius) rods may be solid or tubular material. Magnetic steel attaching (radius rods) must be tubular with a maximum wall thickness of 3/16 inch (0.1875)
    4. Radius Rods must be a minimum of 1” diameter OD. Rods can be round, square, or hex shaped
    5. Rods must be a minimum of .095 steel or .120 aluminum in tubing thickness.
    6. Heim joints must be a minimum 5/8, and a maximum 3/4” steel heim. No rubber bushings.
    7. ONLY ­ Two (2) radius rods per side.
      1. Radius rods must be spaced on the frame a minimum of 6”
      2. Radius rods must be spaced on the birdcage a minimum of 6” and a maximum of 12”
      3. Measurements will be made from center of each radius rod bolt.
    8. All radius rods must be straight with the exception of the left lower, that can have a bend for axle housing mount clearance.
  9. Birdcages
    1. Birdcages may consist of multiple barrels but must bolt or weld together to work as single barrel birdcage.
    2. Limited one birdcage (1) per side.
    3. Shock(s) and radius rods must mount to the birdcage.
    4. Floating, pivoting and/or rotating mounts and/or brackets of any sort are not allowed. All brackets or mounts attached to the birdcage must be bolted or welded solid.
    5. The only materials used to fabricate axle housing mounts (birdcages) that will be permitted is aluminum or magnetic mild steel. Axle housing mounts fabricated of exotic, heavy materials will not be permitted.
  10. Jack Bolts are permitted

REMOTE CONTROL SUSPENSION DEVICES

  1. NO “in-cockpit driver controlled” suspension devices permitted. NO weight jacks of any kind permitted. (This includes fifth [5th] coils, etc.). ANY driver using “in-cockpit driver controlled” suspension devices or weight jacks WILL BE DISQUALIFIED FROM COMPETITION!

MUFFLERS

  1. Mufflers are MANDATORY.
  2. Exhaust is not permitted to be directed towards ground. Exhaust must be parallel to the ground.

TRACTION CONTROL DEVICES

  1. All Traction Control Devices are strictly prohibited during any form or portion of an event, race or practice/test session.
  2. All traction control devices whether electronically controlled in the ignition system, wheel sensors or any means of measuring ground speed to control wheel spin are strictly prohibited. All devices not mentioned in the above that are found to control wheel spin, timing or fuel delivery control will be considered strictly prohibited.
  3. At NO time will there be any type of ping control devices, dial a chip controls, timing controls or any modifications to the ignition control boxes, distributors, or any other part of the Ignition System. This includes any add on component or components inside or outside the cockpit of any competitors racecar. There shall be NO driver controlled wheel spin, timing or fuel delivery control devices in the cockpit area of any racecar.
  4. A competitor found with any of the above mentioned will lose the complete device permanently and will lose all points earned to that point in the season. NOTE: A competitor may be asked for his electronic ignition at any time by the Technical Director to be sent for testing and inspection. Failure to hand over the electronic ignition will result in the holding of any purse monies won.
  5.   GPS and/or any other type of electronic tracking and/or locating device will not be permitted for any reason.

WEIGHT LIMIT

  1. The following weight rule will be in effect:
    1. Cars with Aluminum blocks: 2350 lbs
    2. Cars with Steel blocks: 2300 lbs.
    3. Cars with factory sealed GM CT525 engines: 2250 lbs.
  2. No burnoff allowance will be given.
  3. Any attached weights must be securely attached to the frame, painted white or bright silver and have the car number clearly displayed on them. All weights must be secured by two (2) half inch (1/2”) Grade 5 or higher bolts on two (2) weight clamps. Weights secured by one bolt and/or held on by a means other than accepted by the Technical Inspector will not be permitted. Due to the high risk factor involved, any car that loses lead weight during an event may be fined or face disqualification.
  4. All added weight(s) must be securely attached to the frame below the body decking.
  5. Frame is defined as the steel welded structure only.
  6. Any part that moves or is not a fixed component to the steel frame structure may not be used for any weight attachment.
  7. No weights may be attached to rear bumper.
  8. No driver-operated weight adjustment devices are permitted.

SAFETY EQUIPMENT

Safety equipment specifications listed below are listed as a guide and are only a minimum standard. These minimum standards may not be sufficient enough to protect a driver from injury or death from some incidents. It is the responsibility of the driver, car owner, and crew to ensure that the safety equipment on the car is properly installed, working as intended, and is sufficient to protect the driver from any incidents that occur. This may include using safety equipment that goes above and beyond the minimum specifications and recommended equipment listed below. 

  1. Batteries:
    1. NO batteries to be located in the drivers’ compartment/cockpit.
    2. The battery must be securely mounted with positive fasteners and brackets.
    3. The battery terminals must be insulated or enclosed with a non-conductive material that will prevent contact with any part of the race car should the battery become dislodged from the battery mount.
    4. One (1) mandatory battery disconnect switch must be installed on the rear deck, behind the driver seat, in a location that is easily accessible from outside the race car. The switch must be clearly labeled with off/on direction. The switch must be directly in-line with the NEGATIVE battery cable and be capable of completely disconnecting the NEGATIVE terminal of the battery from the race car. Negative or “ground” wiring connections must not be made anywhere from the battery negative terminal to the input side of the disconnect switch. An additional battery disconnect switch within the driver’s reach may also be used
  2. Seats:
    1. Full containment type seats constructed of aluminum to the general design specifications of SFI 39.2 standards are highly recommended. Design should include comprehensive head surround, shoulder and torso support system, energy impact foam, and removable head foam.
    2. Up fitting a current seat with bolt on kits will be permitted with a seat manufacturer produced kit and a base seat acceptable to the seat manufacturer. Components should include comprehensive head surround, shoulder and torso support system, energy impact foam. Must be installed in accordance to seat manufacturer’s instructions.
    3.  Seats must be used as supplied and instructed by the seat manufacturer with the exception of trimming the length of the left side head surround for the purpose of egress only. If the left side head surround is trimmed to a distance that is less than the most forward surface of the drivers helmet (usually the area crossing the chin) then a left side head net meeting the SFI 37.1 must be installed with a quick release latch.
    4. Seats must be mounted to a seat frame that is welded to the race car frame/roll cage structure. Attaching points, angles, and materials for the seat frame and mounting of the seat to the seat frame must be in accordance to the seat manufacturer’s instructions.
    5. Seat mounting brackets must use properly sized bolts and washers for the hole in bracket. No oversized holes or slotted holes in the bracket.
  3.  Restraints:
    1. The use of a 5, 6 or 7 point driver restraint system certified to SFI Spec 16.1 or 16.5 is REQUIRED no exceptions. All driver restraint systems shall not be in excess of 3 years of age past the date of manufacture. The use of a 7 point driver restraint system is strongly recommended. All mounting points of the racing harness MUST be mounted properly in accordance with the manufacturer’s instructions, and securely mounted to the chassis with the use of grade 5 or better hardware.
  4. Window Nets:
    1. Window Nets certified to SFI Spec 27.1 are highly recommended and must be mounted in accordance with the manufacture’s instructions and technical director’s satisfaction.
  5. Driver Worn Equipment:
    1. A helmet certified to Snell SA2010/FIA-8860, Snell SA2015/FIA-8860, SFI 31.1/2010 or SFI 31.1/2015 is REQUIRED.
    2. A driver suit certified to SFI Spec 3.2A/5 is REQUIRED.
    3. Gloves certified to SFI Spec 3.3/5 are REQUIRED.
    4. Socks and Shoes certified to SFI Spec 3.3 are REQUIRED.
    5. Head and Neck Restraint Devices/Systems are Highly Recommended
    6. At all times during an Event (practice, qualifying, and competition), drivers must connect their helmet to a head and neck restraint device/system certified to SFI Spec 38.1. The device/system must display a valid SFI Spec 38.1 label.  The head and neck restraint device/system, when connected, must conform to the manufacturer’s mounting instructions, and must be configured, maintained and used in accordance with the manufacturer’s instructions.
  6. Drive Line:
    1. A driveline “sling” is REQUIRED.
  7. Cockpit Tubs:
    1. Eighteen (18)-gauge steel or one and one-eighth inch (1 1/8″) aluminum “cockpit tub” to protect front, sides and rear of driver is HIGHLY RECOMMENDED.
  8. Fire Suppression:
    1. An in-car Fire Suppression system is Highly Recommended.
    2. All race cars should be be equipped with a thermally deployed automatic fire suppression system. The fire suppression system will consist of a DOT approved cylinder manufactured from aluminum or steel with a capacity of ten (10) lbs. of fire extinguishing agent, steel or steel reinforced lines, and two (2) thermally activated discharge nozzles.
    3. All systems must meet or exceed SFI 17.1 specifications.
    4. Systems must be fully charged with ten (10) lbs. of DuPont FE-36, 3M NOVEC 1230, or Fire Aide and display a legible and valid SFI and manufacturer label depicting fire extinguishing agent, capacity, and certification date. Cylinders that or beyond useful certification date must be inspected, serviced and re-labeled by the manufacturer.
    5. Cylinders must be mounted forward of the fuel cell. Cylinders must be securely mounted to the frame/roll cage assembly. The certification label must be unobstructed and easily accessible for inspection when the mounting is complete.
    6. The cylinder must be connected to the nozzles with steel or steel reinforced lines.
    7. Two (2) thermally activated nozzles must be used. One (1) nozzle must be located directly above the fuel cell in the fuel cell area and the second nozzle must be located in the driver cockpit area.
    8. An optional manual override cable may be added to the system.
  9. Drivers under the age of 18 are REQUIRED to have a HEAD SOCK, window net, gloves, and either a neck collar or a head and neck restraint system in addition to all other required safety equipment in place.

CAR CONSTRUCTION INFRACTION PENALTIES

  1. You may be given a simple warning.
  2. You may be asked to correct the infraction.
  3. You may be assessed a weight penalty.
  4. You may be disqualified when found and/or noticed with an infraction.
  5. You may choose to leave.

MISCELLANEOUS

  1. NO two-way radios. No crew to driver radio or transmitted communications of any kind.
  2. NO “in-cockpit driver controlled” electronic devices of any kind permitted.
  3. NO computer controlled devices of any kind permitted.
  4. NO rearview mirrors of any kind permitted.
  5. Raceceivers are mandatory at all times. 
  6. Electronic scoring is used to score all laps of all races. The scoring order of the electronic scoring system will me used for all positions and all laps unless an error occurs. This will be at the judgement of race officials only.
    1. A Westhold style transponder is mandatory at all times. 
    2. Transponder must be located on the left front down tube.
    3. Mounting the transponder at any other location can result in disqualification, loss of positions, or other penalties. 

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Modified Rules

RULE BOOK DISCLAIMER

The rules and/or regulations set forth herein are designed to provide for the orderly conduct of racing events and to establish minimum acceptable requirements for such events. These rules shall govern the condition of all events, and by participating in these events, all participants are deemed to have complied with these rules. No express or implied warranty of safety shall result from publications of or compliance with these rules and/or regulations. They are intended as a guide for the conduct of the sport and are in no way a guarantee against injury or death to a participant, spectator or official.

The race director shall be empowered to permit minor deviation from any of the specifications herein or impose any further restrictions that in his opinion do not alter the minimum acceptable requirements. No expressed or implied warranty of safety shall result from such altercation of specifications. Any interpretation or deviation of these rules is left to the discretion of the officials. Their decision is final.

Engine

  1. Any American made push-rod type engine will be permitted as long as the rear of the engine bell housing flange is mounted at least 72”-inches forward from the center of the rear axle. The engine offset must remain within two (2”) inches of the center line from the cross member. The minimum engine height when measured from the ground to the center of the crankshaft is 11” inches. Other engines of the push-rod type that meet this criteria may be approved for competition.
  2. All engines used in competition must be able to be used in a conventional passenger car without alteration. Alteration of motor mounts will not be permitted. Alteration of the castings and/or fittings will not be permitted. Any machine work on the outside of the engine or machine work on the front or rear of the crankshaft will not be permitted.
  3. Aluminum blocks will not be permitted.
  4. Magnetos will not be permitted.
  5. Wet sump oiling systems must be operative. Dry sump systems will not be permitted.
  6. Alteration to the cooling system will be permitted. If alterations to the cooling system are made the stock-appearing hood line must be maintained.
  7. The battery must be securely mounted and shielded. The battery must not be mounted inside the driver’s cockpit.
  8. The exhaust system(s) must be mounted with the exhaust directed away from the vehicle and away from the ground. The exhaust system(s) must remain completely below the interior deck of the car. The entire exhaust system (including the exhaust pipe and/or header exits) must be inside all parts of the body. The only breach of any interior or exterior body panel that will be permitted is for routing the left side header or exhaust pipe on the left side of the car. When routing the left side header or exhaust pipe through the left side firewall a maximum of 1/2” inch clearance around the header or exhaust pipe will be permitted. 
  9. Mufflers are mandatory.
  10. One two or four barrel carburetor is required.
  11. The engine must be a normally aspirated configuration.
  12. Fuel injection systems or electric fuel pumps will not be permitted.

Transmission & Driveline

  1. The drive shaft must be made from magnetic steel. The driveshaft must be painted white with the car number clearly labeled on the drive shaft.
  2. Carbon fiber drive shafts will be permitted. Aluminum or fiberglass drive shafts will not be permitted.
  3. A 1/2”-inch x 2”-inch 18-gauge steel drive shaft hoop is mandatory. The drive shaft hoop must be at least six (6”) inches behind the universal-joint. Two hoops are strongly recommended. A single 1/8”-inch plate on the right side of the drive shaft tunnel is recommended.
  4. All competitors are encouraged to perform systematic checks on their drive-train.
  5. Direct drives and/or any type devices will not be permitted.
  6. The transmission must be bolted to the engine. All cars must have forward and working reverse gears and be able to shift to forward or reverse with engine running. BERT-type transmissions will be permitted.
  7. Clutch-type transmissions must be equipped with explosion-proof steel bell housing. In lieu of an explosion-proof bell housing or if one is not available for your engine, a shield of at least 1/2”-inch x 6”-inches covering the clutch area 360 degrees securely fastened in place and fabricated from magnetic steel will be permitted.

Chassis/Frame

  1. Only factory production full 1950 or newer parallel American passenger car frames will be permitted. The frame must be complete in front of firewall. Cutting of the frame in any way in front of firewall will not be permitted.
  2. The frame must remain unaltered and must meet the requirements of the attached drawing.
  3. The Right side frame rail may not be altered and/or raised and/or moved from the stock OEM location in any manner and must measure a maximum of six (6) inches from the ground to the bottom or lowest edge of the frame rail.
  4. The front cross member may be notched to allow clearance for the radiator only. The cross members must be plated to retain complete box configuration.
  5. Jeep, Bronco, 4-wheel drive, front wheel drive or sports car frames will not be permitted.
  6. The minimum wheelbase permitted will be 108” inches. The maximum wheelbase permitted will be 112” inches. No tolerance – measurements are as posted
  7. Fiberglass lift bars and/or rear torsion bars will not be permitted.
  8. Any frame may not be widened or narrowed and must be able to support the roll cage on both sides and must be full and complete on both sides.
  9. The minimum frame and body height from ground is four (4) inches.
  10. The front bumper must be mounted to the ends of the frame with the bottom loop parallel to the ground.
  11. A minimum of 1” diameter tubing and/or pipe is required to for towing of the vehicle.
  12. The rear bumpers must be constructed of tubing and/or flat stock. All rear bumpers and/or tubing utilized in the fabrication of the rear bumper assembly must have an end cap. The rear bumpers must protect the fuel cell.
  13. The bumper(s) (front and rear) when measured from their center(s) must have a minimum of 25” inches of ground clearance. There will be a two (2) inch tolerance, plus or minus regarding this dimension. The rear bumper and/or the nerf bars must not extend beyond the width of rear tires. All bumpers must have round edges. Sharp edges on any bumper and/or bumper surface will not be permitted.
  14. The brace bars forward of the roll cage must not extend higher than stock hood height.
  15. The rear push bars must not extend beyond six (6”) inches of the rear quarter panel(s).
  16. All side bars and bumpers must be capped on ends.
  17. The maximum overall width of the car, front and/or rear, shall not exceed 78” inches when measured from the outside of the tire tread on both sides of the vehicle. A maximum one (1”) inch spacer between the hub and wheel will be permitted. Steel and/or aluminum spacers will be permitted, provided the overall tread width of the vehicle does not exceed 78”-inches.

Weight

  1. All added weight(s) must be painted white with the car number clearly labeled on each weight.
  2. All added weight(s) must be securely mounted to car with minimum of two (2) 1/2”-inch bolts that pass completely through each weight and the car. Weights that are mounted on the rear bumper or outside the body of the car will not be permitted. All added weight must be mounted below all windows and the interior sheet metal.
  3. All added weight(s) must be securely attached to the frame below the body decking.
  4. Frame is defined as the steel welded structure only.
  5. Any part that moves or is not a fixed component to the steel frame structure may not be used for any weight attachment.
  6. Weights attached to the rear bumper and/or outside the frame will not be permitted.
  7. Any car that loses any weight(s) during any event will be disqualified.
  8. The minimum weight of car with driver at all times including after the race is 2,400 lbs.
  9. Burn off and/or weight percentages and/or tolerance after the completion of any racing event will not be permitted.

Fuel Cells and Fuel

  1. Fuel cells must be used in accordance with the manufacturers specifications. Alterations of any kind will not be permitted (example: alterations to top plate, alterations or removal of foam, etc.).
  2. Either meet FT3 or SFI 28.3 requirements and/or Include:
    1. Key components of an approved fuel cell are: a metal container, bladder, foam baffling for slosh and explosion suppression, flap valve and rollover vent valve, threaded or snap lock cap.
    2. Fuel valve plate, fuel pickup and fuel return fittings must be on the top of the fuel cell.
    3. The fuel cell must be completely enclosed in an 18-gauge magnetic steel container.
    4. Fuel cells that are not contained within a welded steel tubing “rack” must have two (2) equally spaced steel straps that measure two (2) inches wide by 1/8 inch in thickness that completely surround the fuel cell. The straps must be bolted to the frame. Longitudinal (front to rear) orientation is recommended for strap mounting.
  3. The maximum capacity for the fuel cell will be 22 gallons. Engines that are fueled by alcohol may have a maximum capacity of 32 gallons.
  4. All fuel cells must be completely visible.
  5. The fuel cell must not extend lower than protective tubing.
  6. Racing gasoline or alcohol will be permitted.
  7. Nitrous oxide, nitrous methane, propylene oxide or any type of additives will not be permitted.

Body

(See drawing diagram for reference – There may be dimensions referenced in the drawing diagram that are not referenced in written rules and vice versa. All dimensions whether written and/or referenced in the drawing diagram dimensional are rule(s),)

  1. All bodies must follow dimension(s) and the appearance as shown in diagram. The body shall be the fabricated modified body from approved vendors. The body must be symmetrical, including but not limited to doors, nose, sail panels, spoiler supports, etc…The body must be symmetrical, including but not limited to doors, nose, sail panels, spoiler supports, etc.
  2. The front windshield and rear window support must be stock appearing. The front window support(s) may have a clear Lexan support of no more than 16” inches including the roof post at the bottom and going straight to the roof. The support must be securely fastened in a positive manner.
  3. The front roof post must be in a straight line from top to bottom.
  4. The sides of the engine compartment will remain open. Any side panels in the engine compartment area will not be permitted. A five (5”) inch drop on either side of the hood will be permitted and it must enclosed at the rear of the hood. The firewall on driver’s side must meet the front of the door. The firewall must be a minimum of 16”-inches in length from top-to-bottom.
  5. The top of the doors must remain in line with the rear engine plate. The bottom of the doors may extend a maximum of eight (8”) inches past the motor plate toward the front of the vehicle. Any material that exceeds 8”-inches will not be permitted.
  6. Right panel from top of door to bottom of door may not be no more than 3 inches and must be mounted straight inside the bottom.
  7. A maximum one (1”) inch flange on the outside edges (left and right side vertically) for the purpose of strengthening only will be permitted on the front nose only. Side fins and/or flanges of any kind along the length of the entire car (hood, front,and/or roof) will not be permitted.
  8. A maximum of one (1) stone deflector, for rear mounted oil pumps, oil filters, and for the main oil tank will be permitted. The deflector may be made of steel, aluminum, or heavy gauge wire. The cover may only be mounted near the unit it is designed to protect with a maximum size of eighteen (18”x18”) inches square and mounted only from the upper right frame rail to the lower right frame rail.
  9. The minimum roof height is 42” inches with a maximum height of 52” inches.
  10. The minimum deck height is 28” inches with a maximum height of 38” inches.
  11. Deck height should measure within 1”-inch from side-to-side.
  12. All cars must have a car number on both sides and the roof that are at least 18” inches in height and 14” inches in width.
  13. The driver’s last name must be displayed under the car number in a legible font that is a minimum of eight (8”) inch high letters.
  14. A minimum of two (2”) inches of tire clearance from the body is required.
  15. The minimum ground clearance will be four (4”) inches.
  16. The measurement from center of the hub to the rear top of deck will be a minimum of 34” inches and a maximum of 48” inches.
  17. The maximum body width at the body’s widest part will be 72” inches. The minimum of width at the body’s narrowest part will be 53” inches. The bottom of the doors may have a maximum width of 68” inches.
  18. On the left side the rear of the door may flare out six (6”) inches for tire clearance.
  19. The bottom of the flare must be curved and rounded not pointed in any fashion.
  20. The maximum rear width of car must be 67” inches at the widest point.
  21. The maximum roof width will be 50” inches with a minimum of 44” inches.
  22. The maximum roof length will be 56” inches with a minimum roof length of 41” inches.
  23. The maximum height on rear roof post vertical is 3” inches.
  24. The nose piece must not exceed 45”-inches in width, centered between the frame rails and must not extend past the leading edge of the front bumper. The nose piece must have a minimum of six (6”) inches from the ground to the bottom edge of the nose piece.
  25. Rear spoilers of any type, including but not limited to, shaping of panels, shaping of interior body panels, shaping and/or redirecting airflow with sail panels, etc., will not be permitted.

Interior and Driver Compartment

  1. All windows must have a minimum 11”-inch vertical opening. The entire interior must have a minimum of 11”-inches of clearance from the interior deck to the roof and all sections of the roll cage. The minimum window opening will be 12”inches. The interior deck sheet metal to the right side of the driver from the back of the seat forward should be fabricated on an angle from the driveshaft tunnel to the right side window to promote ease of exit for the driver through the right side and or front window opening.
  2. A master ignition switch within easy reach of the driver is mandatory. The switch must be clearly labeled “ON” and “OFF”.
  3. Hydraulic and/or pneumatic weight jacks, trackers, or similar adjustable components of any type will not be permitted.
  4. Mirrors of any type will not be permitted.
  5. The drivers compartment must be sealed from the engine and the race track. The rear bubble of the hood should be closed and sealed from the driver.
  6. Interior decks must be flat from side to side. Interior decks may have a up to a total of 6”-inches of “rake” from the most forward part of the deck to the most rearward part of the deck as described below. Interior deck from the rear of the seat forward may be flat or have up to 3”- inches of rake. The interior deck from the rear of the seat to the rear of the car cannot exceed 3”- inches of rake regardless of how much rake the front portion measures. The rake of the rear portion of the interior deck must be in a straight flat line from the rear of the seat to the rear of the car.
  7. Any car in competition must have right side door bars as part of the roll cage.

Roof & Roof Supports

(see drawing diagram for reference)

  1. All roofs must be full size. Half-moon roofs will not be permitted. The roof may not be mounted more than 12” (twelve inches) past the rear axle. The roof must be symmetrical.
  2. Wings, roof spoilers or ground effects of any kind will not be permitted.
  3. All flat type roofs will be allowed a maximum 3”-inch difference in height between the front of the roof and the rear of the roof. This measurement may be taken from the interior and/or the ground up in any circumstance. The rear of the roof must maintain the same height from side-to-side.
  4. All curved type roofs will be allowed a maximum of 5”-inches in the front and 2”-inches in the rear. The break in the roof must be within 6”-inches from the center of the roof.
  5. Wedge roofs will not be permitted.
  6. Dished roofs will not be permitted. Roofs must be rounded side-to-side. Bead rolls will be permitted.
  7. The rear roof post must begin where it meets the back edge of the roof. The rear roof supports may not extend past the front side of rear upright of the roll cage.
  8. The side vents on the front roof posts may extend rear ward from the lowest point, a maximum of 16”-inches, then at a 90 degree angle to roof for one (1) configuration, side vents must meet the outside of the car.
  9. The roof side (sail) panel window size must be 10”-inches x 15”-inches and must match drawing number – 2- side view. The roof side (sail) panels must be the same design, length (top and bottom) on both sides of the car. The roof side (sail panel will be allowed a 2 inch max. crown, when using a crown, the crown must be the same on both sides) When placing a straight edge vertically on the roof side (sail) panel it must touch the bottom of the panel (where it is fastened to the quarter panel), the top of the panel (where it fastens to the roof panel) and have no more than 2 inches of crown the entire surface between the (2) two mounting points The roof side (sail) panels must be symmetrical. The sail panel must be in the same location on both sides.
  10. When using the long roof side (sail) panels, They must be mounted in the same way as described above.
  11. If the long roof side (sail) panel is being used a 1”-inch radius will be permitted.
  12. Any sun shield must be on hinge for easy exiting, taping will not be permitted. The window opening must remain at a minimum of 12”-inches.
  13. All race cars in competition must meet the measurements illustrated in the attached drawing.
  14. There are only 4 (four) approved roof supports to choose from.
  15. The roof should be single thickness of material. The roll bar hoops must be exposed for inspection.
  16. If the roof is curved then a level will be placed on the top of the car and if the roof is 5”- inches or less in the front and 2”-inches or less in the rear and the break is in the middle then the roof will be permitted.
  17. The roofs on these cars will be stock appearing. The roof must maintain the same height on both sides. If track officials determine the roof does not meet the requirements as stated above then a penalty as determined by the official may be determined prior to competition, additional weight and/or other penalties, unless the roof can be returned to within the parameter as stated above prior to competition in the event that the roof was inspected for.

Suspension

  1. Suspension/Steering designs and applications are constantly evolving. Although the intent of the suspension/steering rules are an attempt to accommodate the majority of suspension/steering and suspension/steering component designs and applications currently being used in competition, the rules cannot be absolute.
  2. Unless otherwise specified, suspension/steering components must be manufactured using magnetic steel only. This includes but is not limited to, shocks, hubs, all control arms (A-frames), axle tubes, tie rods, etc.
 

Front Suspension

  1. All front suspension and steering components (except the upper control arm mounts) must utilize the original O.E.M. suspension and steering component mounting holes. All mounting holes must remain a single round hole as produced by the O.E.M. Adjustable mounts and/or “slugs” will not be permitted.
  2. Weight jacking bolts (wedge bolts) may be added to O.E.M. frame but, must be located within 1 (one) inch of the original centerline of the O.E.M. front spring location.
  3. Unless otherwise specified, the front suspension components must be O.E.M. serviceable parts and originate from the same O.E.M. frame manufacturer for that application.
  4. Unless otherwise approved, only O.E.M. and/or O.E.M. replacement type passenger car spindles will be permitted. Spindle O.E.M. manufacturer and model is optional. Fabricated spindles will not be permitted. Spindles must not be altered. O.E.M. spindles utilizing a removable steering arm must use the same O.E.M. steering arm originally supplied with the type and model of spindle being use or a fabricated steering arm that is an exact match (length, mounting holes, etc.). If a fabricated steering arm is used, competitors must be prepared to supply an O.E.M steering arm for an inspection comparison.
  5. One side lower control arm must maintain the OEM dimensions. The opposite side lower control arm must maintain the OEM dimensions +/- one (1) inch. The maximum outside to outside tread width measurement must not exceed 78”-inches.
  6. Alterations and/or relocation of the lower control arm mounts will not be permitted. Lower control arms may be O.E.M. lower control arms for the frame being used or DIRTcar approved fabricated lower control arms, which are mounted in the O.E.M. location and maintain the O.E.M. dimensions. Lower control arms must be the same length when comparing to O.E.M. right and left. The lower coil spring seat must be an integral welded component of the lower control arm. If using spherical rod ends (heim joints) as lower control arm mounts, the spherical rod ends (heim joints) must be welded to the lower control arm to prevent adjustment. Competitors must be prepared to supply an O.E.M lower control arm for an inspection comparison. 
  7. Tubular-type upper A-frames will be permitted. The upper A-frame mounting locations may be relocated. Aluminum cross shafts will be permitted.

Steering

  1. An O.E.M. steering system applicable to the O.E.M. frame assembly must be used. The steering system must consist of 1 (one) reciprocating steering gear assembly, 1 (one) pitman arm, 1 (one) idler arm, 1 (one) center steering link (drag link), 2 (two) inner tie rod ends or spherical rod ends, 2 (two) adjusting sleeves, and 2 (two) outer tie rod ends or spherical rod ends. Additional components, braces, rods, etc. will not be permitted.
  2. O.E.M. or exact fit aftermarket replacement center steering (drag) link, pitman arm, and idler arm available at auto part replacement venues will be permitted. Aftermarket components must match O.E.M. for all specifications, dimensions and design. Only single point round tapered mounting holes and O.E.M. tapered ball studs will be permitted. **
  3. Fabricated center (drag) links, braces, etc. are not permitted.
  4. Steel spherical rod ends (heim joints) and fabricated magnetic steel tie rod adjusting sleeves will be permitted. 5/8″or larger spherical rod ends and fasteners must be used. The inner rod end must connect to the center steering link using a stud that is tapered to fit the center steering link on one end with a straight 5/8″stud on the opposite end, or the center steering link may be drilled to accept a 5/8″ bolt. The outer rod end may use a 5/8″ grade 8 bolt with a bump steer spacer to connect to the steering arm. The O.E.M. steering arm may be drilled to accept a 5/8″ bolt. Tie rod adjusting sleeves must be magnetic steel tubing.
  5. The steering shaft and interior mountings may be fabricated. The steering wheel must remain on the left side of the vehicle. The steering shaft must have at least 1 (one) universal type joint to allow shaft to “fold” under impact.
  6. All steering wheels must connect to the steering shaft with an approved quick release coupler. SFI certified steering wheel couplers are highly recommended.

Rear Suspension

  1. Rear suspension configuration used on current and new chassis(s) must be the design commonly known as four (4) link. Older cars currently competing with other rear suspension designs will be allowed to compete until further notification.
  2. The frame/roll cage structure must have integral welded mounting brackets for the attachment of rear suspension components. Frame suspension mounts may be welded or bolted securely (without any movement) to the frame/roll cage structure.
  3. The only materials used to fabricate frame suspension mounts that will be permitted are magnetic steel or aluminum.
  4. Axle Housing Mounts
    1. Aluminum birdcages will not be permitted.
    2. Axle housing mounts may be a solid (welded) type or a floating type (birdcage) design.
    3. Only one (1) axle housing mount per side will be permitted.
  5. The final assembled axle housing mount must be a one (1) piece mount. When a floating type mount (birdcage) is fabricated using two (2) pieces, the two (2) pieces must create a common one (1) piece pivot (barrel). The two (2) pieces must be fastened or welded together to prevent independent movement of the two (2) pieces. The axle housing mount must attach directly to the axle tube with clearance only to permit rotation of the entire mount. Fore, aft or vertical movement of the mount or the axle housing within the mount will not be permitted.
  6. Only 2 (two) radius rods per side will be permitted to be connected from the axle housing mounts (birdcages) to the frame. Radius rods must be magnetic steel. Spring rods or any type of radius rods that change length dynamically are not permitted. (See Brakes 15.7.6D for floating caliper specifications)
  7. Radius rods must attach to the frame brackets and to the birdcages using metal spherical rod ends or mono ball type bearings. Non- metallic bearings and or bushings will not be permitted. All mounting holes for attaching radius rods must be round and properly fit the fastener being used to prevent movement.
  8. Independent rear suspensions will not be permitted.
  9. In regard to swing arm and/or Z-Link suspension, these suspension types are permitted. The shock on a swing arm or z-link rear suspension may mount to the bird cage or bottom radius rod. Top and bottom solid links must be mounted on hiems and run in the opposite direction of bird cage.
 

Shocks and Springs

  1. One (and only one) coil or leaf spring per wheel must be used. Coil springs must be manufactured from magnetic steel. Rear leaf springs (if used) may be either magnetic steel or an approved composite material. All coil springs must be a minimum of 5 (five) inches in diameter. Coil springs must be wound with all coils being the same O.D., I.D. from the top to the bottom of the spring. The coil spring wire diameter must be the same from the top to the bottom of the spring. Coil spacing must be equal. Round coil spring wire must be used. Coil springs with linear spring rates are the only coil springs permitted. Air springs are not permitted.
  2. Front coil springs:
    1. The top of the front coil spring must be closed end and ground flat.
    2. The upper front coil spring mount must be flat and support the top of the spring 360 degrees.
    3. The lower end of the front coil spring must be an open end with a maximum gap of 1/4 inch between the “tail” of the spring and the next coil.
    4. The lower front coil spring mount may have a single step to prevent spring rotation and accommodate the open end of the spring. The step of the lower front coil spring mount must not exceed one (1) inch in height. The lower coil spring mount must be a welded integral component of the lower control arm. When installed the lower end of the front coil spring must be supported 360 degrees.
  3. Rear Coil Springs:
    1. The top and bottom of the rear coil spring must be closed end and ground flat.
    2. The upper and lower rear coil spring mounts must support the spring for 360 degrees.
    3. Rear steel coil-over eliminators and/or steel/aluminum coil-over kits will be permitted. The coil-over eliminators and/or coil-over kits must conform to the shock and spring rules.
    4. Only one coil spring per wheel will be permitted.
  4. All rear springs must have a tethered and/or cable system in place to securely fasten them in position in the car.
  5. One and only one coil spring will be permitted on the lift bar and or brake spring. Lift bar and or brake springs must be a minimum of 5”-inches in diameter.

Shocks

  1. Only magnetic steel body, mono tube shocks with approved external adjustments will be permitted. Approved external adjustments are adjustments that can only be made with the shock absorber removed from the car. Remote adjusters of any type will not be permitted. Shocks must be conventional oil emulsion design. Shocks may be gas pressurized providing gas reservoir is an integral component of the shock body. Gas must be separated from the oil by a divider piston with a positive stop. The external portion of the shock shaft must remain exposed at all times. The lower shock “bearing” inside diameter and the shock shaft must not exceed 5/8″ in diameter. Pneumatic (AIR) shocks, remote adjustable shocks, and remote gas reservoirs will not be permitted.
  2. Coils over shocks of any type on the front of the car will not be permitted.
  3. Only one shock per wheel will be permitted. Lay down shocks less than 12” (twelve inches) away from brake rotor will not be permitted.

Axle Housing, Rear Differential

  1. The axle housing must be of the “closed tube” design utilizing “full floating” magnetic steel hubs and axle shafts. “Live axle”-type rear ends will not be permitted.
  2. Quick change rear ends will be permitted.
  3. The center section of the axle housing must be manufactured of either aluminum or magnesium.
  4. Axle tubes must be one (1) piece and manufactured of magnetic steel only. Axle tube internal inserts or external sleeves will not be permitted.
  5. The axle tube must not exceed (3) three inches O.D. (outside diameter) at any point from center section to hub.
  6. Rear differentials in all cars must be locked. Both rear wheels must always rotate in the same direction and never free wheel or turn at a different speed through the differential. Differentials may be locked by using a steel or aluminum spool, a steel or aluminum mini spool, or welding. Open, limited slip, traction sensitive, Detroit lockers or any other device that allows independent wheel rotation will not be permitted.

Brakes

  1. All cars must be equipped with a working braking system on all four wheels and all four wheels must be able to stop/brake at all times.
  2. Front brakes must utilize a one piece O.E.M. or aftermarket O.E.M., magnetic steel hub and vented rotor assembly. Rear brakes must utilize magnetic steel vented rotors. Carbon fiber, aluminum, and solid disc rotors will not be permitted. Drilling, lightening and/or any alteration to the brake rotors or calipers will not be permitted. Brake rotors of excessive size or weight when compared to an O.E.M. brake rotor will not be permitted.
  3. Only stock O.E.M. and/or approved aftermarket calipers will be permitted.
  1. Front calipers must mount solid to the front spindle. Rear calipers may be a solid mount type or a floating type design. Both solid and floating type rear caliper mounts must be mounted to the rear axle housing. When using a floating rear brake caliper, it must be completely separate from the rear axle housing (birdcage) mount. The floating rear caliper mount must pivot independently and be supported by one radius rod to the frame only.
  2. Brake proportioning (bias) valves and a right front shut off valve are permitted.

Wheels and Tires

  1. The following Hoosier tire compounds are the only tire compounds legal:
    1. 26.5/8.0-15 – M-30S, M-60
    2. 27.5/8.0-15 – M-30S, M-60
  2. The Right Rear tire must be one of the following AT ALL TIMES.
    1. 26.5/8.0-15 – M30S,  M-60
    2. 27.5/8.0-15 – M30S,  M-60
  3. Grooving of tires is not permitted. 
  4. Siping is permitted.
  5. Recapping of an approved tire is not permitted.
  6. Defacing or altering any of the manufacturer’s identification markings, letters, words, numbers, on any tire will not be permitted.
  7. Mud plugs are permitted on all four wheels. Bead locks will be permitted on the right side only.
  8. Wheel discs shall be fastened to the wheel using a minimum of three (3)- 5/16 inch or (3) 1⁄4 inch diameter magnetic steel hex head bolts.
  9. The use of wheel discs with any other type of fastener will not be permitted.
  10. Only 8-inch racing wheels will be permitted. Wheels must not weigh over 30 pounds
  11. All wheels must be conventional one-piece magnetic steel and must be mounted with lug nuts. Aluminum, plastic and/or carbon fiber wheels will not be permitted.
  12. All wheels must be fastened to the hub with five lug nuts.
  13. Wheel spacers are permitted. Wheel spacers may only be manufactured from magnetic steel or aluminum. Exotic, heavy metals are not permitted. Wheel spacers must not exceed one (1) inch in thickness. Wheel spacers must not exceed a 6-1/2 inch outside diameter.
  14. Tire softeners and/or chemicals designed to alter the chemical characteristics of the tire and/or the tire surface will not be permitted.
  15. Any chemical treating of tires is illegal.
    1. Officials reserve the right to check and or confiscate any tire used in competition at any time. A driver is fully responsible for any tire used in competition regardless of the source of the tire and/or when the tire was put on the car.
    2. Officials can take tire samples using two methods.
      1. Officials can remove samples using destructive methods. In this case, no tires will be returned regardless of results. Drivers with treated tires will receive no compensation. Drivers with untreated tires will have the tire replaced.
      2. Officials can remove sample grooves from the tread of the tire. No compensation will be given to the driver for tires.
    3. Any tire used in competition may be protested for chemical treating by any driver competing in that same individual event(same feature, heat, qualifications, etc). Protest must be made to track officials prior to when the protested car returns to pit area. Protester must present $500 cash to official at time of protest.
      1. If tire is found to not have been treated, the protested driver will receive $150 for tire replacement even if destructive methods are not used.
      2. If tire is found to be treated, protester will receive $400 of their fee back with $100 being held for processing fees.
    4. All prize monies of drivers with tires taken for testing will be held until lab tests are received. If tire samples do not match the factory benchmark for that compound, the driver forfeits all monies won that night, not only those from the specific race where the driver was protested. (ie – A driver using a tire during qualifying that is found to be illegal will forfeit any monies won in heats, consis, or features that night.)
    5. Drivers with tires that do not match the factory benchmark will be disqualified for the event the samples were taken, be suspended 5 races, lose all championship points earned up to that point, be disqualified from any contingency programs for that season, and be subject to a $1,000 fine. These penalties are for a driver’s first offense. Further offenses will be handled on a case by base basis.
    6. Any driver refusing to submit tires for any testing or intentionally avoiding officials attempts to secure tires will be subject to the same penalties as those found using chemically altered tires.
    7. Any driver making a protest then backing out of protest may be subject to fines, suspensions, and/or other penalties.

SAFETY EQUIPMENT

Safety equipment specifications listed below are listed as a guide and are only a minimum standard. These minimum standards may not be sufficient enough to protect a driver from injury or death from some incidents. It is the responsibility of the driver, car owner, and crew to ensure that the safety equipment on the car is properly installed, working as intended, and is sufficient to protect the driver from any incidents that occur. This may include using safety equipment that goes above and beyond the minimum specifications and recommended equipment listed below. 

  1. Batteries:
    1. NO batteries to be located in the drivers’ compartment/cockpit.
    2. The battery must be securely mounted with positive fasteners and brackets.
    3. The battery terminals must be insulated or enclosed with a non-conductive material that will prevent contact with any part of the race car should the battery become dislodged from the battery mount.
    4. One (1) mandatory battery disconnect switch must be installed. The switch must be clearly labeled with off/on direction. The switch must be directly in-line with the NEGATIVE battery cable and be capable of completely disconnecting the NEGATIVE terminal of the battery from the race car. Negative or “ground” wiring connections must not be made anywhere from the battery negative terminal to the input side of the disconnect switch. 
  2. Seats:
    1. Full containment type seats constructed of aluminum to the general design specifications of SFI 39.2 standards are highly recommended. Design should include comprehensive head surround, shoulder and torso support system, energy impact foam, and removable head foam.
    2. Up fitting a current seat with bolt on kits will be permitted with a seat manufacturer produced kit and a base seat acceptable to the seat manufacturer. Components should include comprehensive head surround, shoulder and torso support system, energy impact foam. Must be installed in accordance to seat manufacturer’s instructions. 
    3.  Seats must be used as supplied and instructed by the seat manufacturer with the exception of trimming the length of the left side head surround for the purpose of egress only. If the left side head surround is trimmed to a distance that is less than the most forward surface of the drivers helmet (usually the area crossing the chin) then a left side head net meeting the SFI 37.1 must be installed with a quick release latch.
    4. Seats must be mounted to a seat frame that is welded to the race car frame/roll cage structure. Attaching points, angles, and materials for the seat frame and mounting of the seat to the seat frame must be in accordance to the seat manufacturer’s instructions.
  3.  Restraints:
    1. The use of a 5, 6 or 7 point driver restraint system certified to SFI Spec 16.1 or 16.5 is REQUIRED no exceptions. All driver restraint systems shall not be in excess of 3 years of age past the date of manufacture. The use of a 7 point driver restraint system is strongly recommended. All mounting points of the racing harness MUST be mounted properly in accordance with the manufacturer’s instructions, and securely mounted to the chassis with the use of grade 5 or better hardware.
  4. Window Nets:
    1. Window Nets certified to SFI Spec 27.1 are highly recommended and must be mounted in accordance with the manufacture’s instructions and technical director’s satisfaction.
  5. Driver Worn Equipment:
    1. A helmet certified to Snell SA2010/FIA-8860, Snell SA2015/FIA-8860, SFI 31.1/2010 or SFI 31.1/2015 is REQUIRED.
    2. A driver suit certified to SFI Spec 3.2A/5 is REQUIRED.
    3. Gloves certified to SFI Spec 3.3/5 are REQUIRED.
    4. Socks and Shoes certified to SFI Spec 3.3 are REQUIRED.
    5. Head and Neck Restraint Devices/Systems are Highly Recommended
    6. At all times during an Event (practice, qualifying, and competition), drivers must connect their helmet to a head and neck restraint device/system certified to SFI Spec 38.1. The device/system must display a valid SFI Spec 38.1 label.  The head and neck restraint device/system, when connected, must conform to the manufacturer’s mounting instructions, and must be configured, maintained and used in accordance with the manufacturer’s instructions
  6. Drive Line:
    1. A driveline “sling” is REQUIRED.
  7. Cockpit Tubs:
    1. Eighteen (18)-gauge steel or one and one-eighth inch (1 1/8″) aluminum “cockpit tub” to protect front, sides and rear of driver is HIGHLY RECOMMENDED.
  8. Fire Suppression:
    1. An in-car Fire Suppression system is Highly Recommended.
    2. All race cars should be be equipped with a thermally deployed automatic fire suppression system. The fire suppression system will consist of a DOT approved cylinder manufactured from aluminum or steel with a capacity of ten (10) lbs. of fire extinguishing agent, steel or steel reinforced lines, and two (2) thermally activated discharge nozzles.
    3. All systems must meet or exceed SFI 17.1 specifications.
    4. Systems must be fully charged with ten (10) lbs. of DuPont FE-36, 3M NOVEC 1230, or Fire Aide and display a legible and valid SFI and manufacturer label depicting fire extinguishing agent, capacity, and certification date. Cylinders that or beyond useful certification date must be inspected, serviced and re-labeled by the manufacturer.
    5. Cylinders must be mounted forward of the fuel cell. Cylinders must be securely mounted to the frame/roll cage assembly. The certification label must be unobstructed and easily accessible for inspection when the mounting is complete.
    6. The cylinder must be connected to the nozzles with steel or steel reinforced lines.
    7. Two (2) thermally activated nozzles must be used. One (1) nozzle must be located directly above the fuel cell in the fuel cell area and the second nozzle must be located in the driver cockpit area.
    8. An optional manual override cable may be added to the system.
  9. Drivers under the age of 18 are REQUIRED to have a HEAD SOCK, window net, gloves, and either a neck collar or a head and neck restraint system in addition to all other required safety equipment in place.

Other

  1. No sharp or protruding edges in or around the cockpit, which would impede the driver’s rapid exit from the car.
  2. Windshield screens with a minimum of .090 inch screens must be securely fastened. Three windshield bars in front of the driver are recommended.
  3. An electrical engine shut off switch is required. The switch must be clearly labeled and within the reach of the driver.
  4. A fuel shut off valve is required. The valve must clearly labeled and within reach of the driver.
  5. Flame retardant seat, roll bar, knee and steering pads or padding are recommended.

Roll Cage

  1. All cars must have a roll cage. The roll cage must be approved prior to competition and it must be welded to the frame. The driver’s head must not protrude above the top of the roll cage with the driver’s helmet on. The top of the roll cage must extend above the top of the driver’s helmet by a minimum of one (1) inch. The entire roll cage and all roll bar pieces must be fabricated from magnetic steel a minimum of .095” in thickness.
  2. The driver and right side door bars must be parallel to the ground and located perpendicular to the driver. There must be right side door bars. The side bars must be welded to the front and rear of the roll cage. No brazing or soldering is permitted. The door bars must have a minimum thickness of .095” and must have a minimum of 1-1/2” diameter. On the driver’s side there will be a minimum of three (3) door bars.
  3. Foot protection is mandatory. One piece of magnetic steel tubing, a minimum .095” in thickness, must be fastened and/or welded across the back of the engine with vertical tubing a minimum of .095” thick.
  4. The door side roll bars are mandatory and must extend into the door panels.
  5. The roll cage must consist of continuous hoops that are no less than 1-1/2” in diameter and must a minimum thickness of .095”.
  6. The roll cage must be mounted securely (welded) to the frame in a minimum of 6 (six) places.
  7. The roll cage must consist of a configuration of front and rear hoops connected by tubing on the sides and/or side hoops. Roll cage must be securely supported and braced. Gussets to brace any portion of the roll cage will be permitted.

Electronic Devices & Traction Control

  1. All electronic and/or computerized wheel spin and/or acceleration retardation traction control devices will not be permitted. Controlled timing devices attached to or controlling accelerator or rotation of wheel will not be permitted. GPS and/or any other type of electronic tracking and/or locating device will not be permitted.
  2. All traction control devices utilizing wheel sensors and/or any means of measuring ground speed to control wheel spin will not be permitted.
  3. Adjustable ping control devices, dial a chip controls, timing controls or automated throttle controls will not be permitted in cockpit or driver accessible areas.
  4. Adjustable restrictor plates will not be permitted.
  5. Any remotely controlled components inside or outside the cockpit of any competitor’s racecar will not be permitted.
  6. Radios or devices for transmitting voice or data will not be permitted, either in the racecar or on anyone connected with the car.

Sport Mod Rules

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2022 Sports Modifieds rule package
UNITED SPORT MODIFIED PROMOTER’S ASSOCIATION
2022 OPEN WHEEL SPORT MODIFIED RULES & REGULATIONS
(1) DISCLAIMER AND WAIVER OF LIABILITY
The following rules are for the Open Wheel Sport Modified division. Interpretation of, or amendment to, these rules may be made at any time in the interest of fair competition. The rules and regulations set forth herein are designed to provide for the orderly conduct of racing events and to establish minimum acceptable requirements for such events. These rules shall govern the condition of all events, and by participating in these events. They are intended only as a guide for the conduct of the sport and are in no way a guarantee against injury or death to participants and / or others involved. These rules and regulations do not warrant or guarantee, in any way, the safety or fitness of any race car. This is a dangerous sport. You are risking your life by participating in any fashion. No racing facility, promoters, officials, track representatives, or sponsors will be held responsible or liable for injury or death.
1. GENERAL RULES
1. All race rules and regulations shall apply at all racing events. A. Items marked with a ** will have the penalty carried to any other track in the association IE: suspeneded 2 weeks from Atomic for xyz rule suspended at Moler and every other track
2. Track officials and the track tech shall have full authority over race cars at any racing events. At the discretion of the officials in charge, any competitor may be disqualified for rules violation, or hazardous equipment, or hazardous actions.
3. All vehicles are subject to inspection by an official at any time.
A. The driver is required to bring the car to the official area in order to be allowed to participate.
B. The driver and track officials are the only ones permitted in the pre-tech / post tech area. Anyone causing trouble in or around the tech areas is subject to ejection from the event.
C. Officials may at their discretion inspect cars in the drivers own pit area.
D. Approval of a participant’s race vehicle; or other equipment by an official inspector shall mean only that the vehicle is approved for participation in a competitive event; and shall not be construed in any way to mean, or imply that the inspected vehicle is guaranteed to be mechanically sound or safe. Be it further known and understood that the racing facility and its officials shall not be held liable for any mechanical failure nor for losses, injuries or death from same. and shall not be construed in any way to mean, or imply that the inspected vehicle has passed tech inspection as post-race tech inspection is the final determination of conforming or non-conforming to the rules 4. Any unsportsmanlike conduct by a driver, car owner, pit crew, agent, etc., shall be grounds for disqualification and / or punitive action; including, but not limited to any and / or all or a combination thereof: probation, suspension, fines, loss, of any and / or all points, loss of any and / or all purse / prize money; which shall be determined by the officials. Drivers are responsible for the conduct and actions of their car owners, crew members, agents, etc.
5. Event officials are in charge of inspection for the event. The event official shall have the final ruling at the event. In the event of a problem with an official call it shall be taken up with track personnel or the track promoter.
6. The Sport Modified class is intended to be economical therefore car is only permitted to run in a sport mod class and cannot compete in the Modified class or any other class.
7. Failure to furnish all information regarding and required for I.R.S. purposes to the racing facility or any false information will result in the same penalties provided above.
8.** Absolutely no alcoholic beverages will be consumed by drivers or their pit crews prior to / or during a racing event. The use, distribution, or sale of illegal drugs at any time can be cause for immediate, indefinite suspension.
9. Drivers under 18 years of age must have a signed and notarized parental consent form signed by a parent or legal guardian. Said document shall be in the possession of the racing facility before participation of said individual will be allowed. Track insurance regulations hold precedence in regards to minimum competition age. Racing facilities may require participants to undergo a physical examination before an individual is allowed to compete in a sanctioned event.
10. All drivers must be registered with the racing facility.
11. Any driver that exits their car for any reason except for a fire or instructed by a track official to do so while on the track will be at the mercy of whatever penalty the track wants to enforce. (2). CONDUCT OF DRIVER AND CREW
1. Officials will not tolerate any unsportsmanlike conduct. If a track determines any competitor to be driving rough and / or you have been determined to have crashed another car intentionally you may be disqualified and lose all points for that event.
(3). INSPECTION AND RULE INFRACTIONS
1. If an official and / or inspector tells a driver that an infraction needs to be fixed on the car, that infraction needs to be fixed.
A. Every track inspector / official will get a list of these drivers and the list could be posted on the official USMPA page.
2. Officials will have the right to conduct a more detailed inspection on any part of the car including the motor at any given time. (Example: (But not limited too) compression, cubic inch, etc.)
(4). INFRACTION PENALTIES
1. The driver will be asked to correct the infraction.
2. If the infraction cannot be fixed for that racing event then the driver will be given a simple warning. Given one (1) week to fix the said infractions. No grace period If infraction is a performance advantage or safety item track official has final say.
3. The driver may be disqualified when found and / or noticed with an infraction.
4. You may choose to leave.
(5). BUY OUT CLAIMS
1. All (cash only) buy out or trade claims must go as follows:
A. The driver placing the claim must be on the lead lap.
B. Driver must stop on the front stretch and shut the engine off to make a claim then proceed to the tech area.
C. Anyone refusing the buy out or trade will lose all money and points accumulated for that racing event. 1. Buy-outs are as followed: 2 Barrel Carburetor – $450.00, 4 Barrel Carburetor 775.00, Shocks – $125.00 Per Shock, Tire protest fee is $125.
(6). WEIGHT AND WEIGH – PROCEDURES
1. All cars must weigh 2,500 lbs with the driver after every race 602 crate 150 lb less (2350 lbs). 2. Any added weights must be securely mounted to the frame or roll cage with at least two (2) ½ inch steel bolts, nuts, and washers. A. Weights must be painted white and have the car number on it. 3. Weights must not be used in the driver’s compartment, or outside the body or hood area must be mounted below all windows and the interior sheet metal.
4. The top five finishing cars, minimum, in each and every race MUST be weighed after each race.
5. Cars which are disqualified from heat races for weight violations of any kind will be put on the tail of a “C” Main or “B” main. If the car count dictates that all cars are in the feature then disqualified cars will start on the tail.
(6). CARS MUST GO DIRECTLY TO THE SCALES AFTER A RACE TO BE WEIGHED.
A. DO NOT GO TO YOUR PIT AND THEN BACK TO THE SCALES.
B. DO NOT STOP AT ANY OTHER PIT AND THEN GO TO THE SCALES.
C. GO DIRECTLY TO THE SCALE!!!
D. NO ONE OTHER THAN THE TRACK OFFICIALS ARE ALLOWED AT THE SCALE.
**TRACK SCALES ARE THE OFFICIAL SCALES** 7. Should a car not make weight:
A. The car will be removed from the scales and will circle back around to the scale line for reweighing to verify the weight of the car.
B. Should the car still not make the required weight, then that car will be disqualified from that race and all cars finishing behind that car will be moved up one position.
C. In the case the following should happen then the sixth (6) place car may be asked to return to the scales for post tech.
8. Cars which are disqualified from the feature for weight violations of any kind will forfeit their points and prize money for that race date.
(6A.) DRIVER ONLY WITH THE CAR AT THE SCALES AND / OR INSPECTION SITE.
A. ANY ONE CAUSING TROUBLE AT THE SCALES WILL BE EJECTED.
B. ANY DRIVER AND / OR PIT CREW MEMBER THAT CAUSES TROUBLE (fighting etc.) WILL CAUSE THEIR CAR TO BE DISQUALIFIED FROM THE ENTIRE RACE EVENT.
C. FURTHER ACTION (points) MAY ALSO BE TAKEN (ejection).
10. Drivers crossing the scales may be asked to remove their helmets before recording the cars official weight.
(7). TRACTION CONTROL **
1. Use of any type of “traction control” is absolutely forbidden in any racing event.
A. For purposes clarity, “traction control” shall refer to any device, controlled by mechanical, electric, and / or computer, either in the car attached to the car, or by a remote means. No data gathering or recording devices. No cockpit or driver controlled ignition timing or fuel delivery devices.
2. Officials may inspect any car they suspect could be benefiting from the use of “traction control” devices at anytime.
3. Driver / crew of car called to be inspected are expected to cooperate (in a sportsman-like manner) with inspector; and may be required to jack up the car, remove wheels, panels/covers, and install jack stands to make safe the inspection process. Failure to cooperate with the inspection will be considered an indictment of guilt on the competitor’s part, and competition will be found in violation of this rule. No Exceptions. No follow up inspection for this violation.
4. Officials maintain the right to confiscate any part/s they suspect as “traction control” from any car, at any time, for as long as it would be necessary to determine if said part/s is or is not classified as an a non-conforming part “traction control” device. If device is found to be conforming, device will be returned as soon as practical to owner. If part/s are found to be “non- conforming”, part/s are sacrificed to the officials.
(😎. ENGINE LOCATION
1. The rear of the engine, bell housing mounting flange surface, must be mounted at least 72 inches forward from the center line of the rear axle.
2. Engine offset must be kept within two (2) inches of the center line of the front cross member.
3. Minimum engine height is eleven (11) inches from the ground to the front center of the crankshaft.
(9). Engine
1. Blocks:
A. Chevy 350, Ford 302, or 351W, Mopar 340 or 360. * OEM steel bock only. No Performance Blocks Allowed.
B. Maximum cubic inch shall not exceed 390 cubic inch. Will be checked
C. Chevrolet Performance Parts 602 crate engine (GM Part Number – 88958602) will be permitted for competition (602 Crate) must have with cast iron heads. No aluminum heads.
D. No machine work may be done on the outside of any engine, or on the front or rear of the camshaft. Blocks may not be shaved.
E. All engines used in competition must be able to be used in a conventional passenger car without alterations.
F. Engine “cast – in” motor mount locations cannot be removed or altered. Castings and fittings must not be altered.
2. Compression:
A. 175 lbs. Maximum compression includes 602 (Hot) NO TOLERANCE. Portsmouth cars traveling to other tracks must pass the vacuum test per PRP rules instead of the compression test, cars traveling to PRP to race must pass the compression test. The test it is either a vacuum or compression eng IE: cannot fail vacuum test then say check as a compression eng . B. Must be dish or flat top pistons.
C. No gas ported pistons.
compression test procedure Techs will check compression by having driver pull spark plug. (Tech will pick plug) Disconnect coil or ignition to keep engine from starting. Use a Snap on or Mac Compression Gauge. Hold carburetor in wide-open position with air cleaner removed. Roll engine until needle on gauge stops moving. (per tech) Look at gauge and take reading. (Tech) Engine must roll at speed capable of starting if car will not crank at speed to tech compression or cubic inch test it will not pass tech (tech has right to put charger on or jump battery to crank or start, we will not push it to tech it).
3. Carburetor:
A. One (1) stock (4412) 2 barrel Holley 1.375 round venturi, 1.687 base plate must have stock measurements no modification except removal of the choke plate. 602 crate engine may run 4 barrel from approved list seeJ below Cars using the 602 crate engine may use one of the following:
One (1) four (4) barrel 650 cfm Holley carburetor, Part Number 4777 or 80777 One (1) four (4) barrel 650 cfm Holley HP Carburetor Part Number 80541-1, (-2). One (1) two (2) barrel 500 cfm Holley carburetor Part 4412.
No modifications with the exception of removal of choke plate. Straight open hole spacer allowed.(NO Super sucker type spacers allowed.) Jets, power valve and accelerator pump may be changed. Must use stock metering blocks. The minimum weight of car using the 602 engine above with driver at all times including after the race is 2,350 lbs.(Note: This weight requirement may be altered during the season as we work on balancing the engine configurations.)
B. A straight 1in. thick max open holed spacer allowed, * NO Super Sucker type spacers allowed.
C. You may change jets, power valve and accelerator pump only.
D. Must use stock metering blocks.
E. Max thickness between top of intake and bottom of carb with gaskets is 1.25”
F. There is a $450 (Cash only) buy out on any 2 Barrel $775. on any 4 Barrel carburetor or trade claimer for his.
* Driver must stop on front stretch to make claim then proceed to tech. Anyone refusing buy out will lose all money and points accumulated for that night. The driver placing a claim must be on the lead lap.
G. Two (2) carburetor throttle return springs are required.
H. Engine must be normally aspirated. No type of fuel injection allowed.
I. Must run restrictor plate provided by the track. Note: this Optional from track to track in 2021, This plate requirement may be implemented after testing during the season as we work on balancing the engine configurations.)
4. Air Cleaner:
A. Only one single round air cleaner. (NO AIR BOXES)
5. Fuel Pumps:
A. OEM style diaphragm pumps only.
B. Must be mounted in Stock location.
C. No electric or belt driven pumps etc.
6. Heads:
A. Heads must be steel only with stock diameter valve spring. (Example: Chevy 1.260 not 1.625).
B. No beehive or barrel springs.
C. No stud girdles.
D. Must have OEM style stamped steel rockers and may use roller tip and /or full roller rocker stud mount.
E. 7/6” diameter rocker studs maximum.
F. OEM type if factory is 23 degrees valve angle, your heads must be likewise.
G. No porting of any kind. (This is to include gasket matching and bowl blending.)
H. No Canted Valve Heads (Cleveland Type)
I. No spacers between heads and intake.
J. Machining or planning to the internal part of the head casting for deck surface cleaning, angle mill or chamber volume reduction as well as surface work on the intake is acceptable.
7. Cams:
A. Hydraulic or flat tappet. (solid)
B. No roller of any type.
C. Must fire OEM (Example: Chevy 18436572) * No 4 – 7 swap cams.
8. Intake Manifold, Adapters and Spacers:
A. Any 4 BBL Intake Only
B. No porting or machine matching of any kind. (This dimension includes gaskets.)
C. No velocity tubes on adapters or built into the intake of any kind.
D. NO PORTING of any kind (this includes gasket matching or anything to increase air flow) to be as taken out of the box.
9. Ignition:
A. No trigger type and / or crank trigger type: MSD or HEI Distributor (OEM) only is permitted. **ALL ENGINES must run a MSD 6500 rpm rev limiter
B APPROVED Ignition boxes MSD 6425, MSD64253, MSD 6420, MSD6430, MSD 6427, Engines Utilizing HEI must run rev control MSD8727CT. NO OTHER INGNITION SYSTEM MAY BE USED. C All rev controllers (limiters) must be out of reach of the driver and sealed in place with clear sealant on both a chip or dial knobs rpm limiter will be checked for any infration or manipulation of these ignition rules includes but not limited to missing sealant busted/cracked sealant revvlimit highrer than 6500 RPM ** 1st offense: any driver exceeding 6500 RPM will be disqualified for the night and lose all points. you will also be suspended from cometition for 4 weeks. 2nd offense suspended for 1yr from date of offense before eligible to participate again. 10. Oil Pump:
A. Must be wet sump only (in the pan).
* No External oil pump of any kind.
11. Oil Pan:
A. Must be steel only. (NO Exceptions).
 
12. Evacuation Pump or System:
A. NO evacuation pump of any kind on the engine.
13. Cooling System:
A. Cooling system may be modified.
B. Radiator and oil cooler must not protrude above interior.
C. No electric water pumps or cooling fans allowed.
D. No Sprinkler systems.
E. Any overflow tubes are to be directed to the ground, between the frame rails.
14. Starter:
A. At beginning or night all cars must have the capability of starting without being pushed or pulled.
B. Starter must bolt to engine in factory location and working.
C. The stock starter must start the car and be the only one on the car.
(10). DRIVETRAIN
1. Drive Shaft
1. Drive shaft can be made of steel or carbon fiber. A. Steel drive shafts must be painted white.
2. Drive shaft loop is required. Loops must be constructed of 1/4” X 2” steel. A. Tubular loop may be used but must be made of minimum 1” diameter tubing.
3. Loops must be mounted no less than two (2) inches and no more than six (6) inches from the rear of the front universal joint of the drive shaft.
2. Transmission / Bell Housing / Clutch
1. A 3 speed, 4 speed manual, and automatic types are allowed. Aftermarket racing transmissions are allowed as recognized by track officials. A. Bert, Brinn, Falcon, etc. are permitted.
2. No “IN and OUT” boxes will be allowed. 3. With motor running and car in a still position, driver must be able to engage car and move forward, then stop and engage car and move backwards.
A. Must have forward and reverse working
4. No type of quick change transmissions permitted.
5. Only OEM or Aftermarket steel bell-housings are permitted. Cars running a full size clutch must run explosion proof bell housing
(11). SUSPENSION / STEERING
1. Front suspension and steering components must be O.E.M. as specified and be in stock location, and must be replaceable by stock part from same type suspension. Stock passenger car spindles or (3) three piece spindle
allowed. No fabricated spindles. Aftermarket tube type lower control arms may be used. O.E.M. stock lower control arms cannot be altered or moved, (exception: may weld shock mount on lower control arm). Steel bushings in
lower control arms are acceptable. All front suspensions must comply with the 78 inch maximum track width.
2. All cars are required to have a collapsible steering shaft unless you have a steering shaft with knuckles or joints that will break off.
3. Tube type upper control arms are allowed and can be moved. Cross bar upper control arm may be aluminum.
4. No center steering. In cockpit steering may be modified to drivers taste, but must remain on the left side of the car.
5. No rack and pinion steering. Steering box must be O.E.M. Steering box must remain within original bolt pattern of frame used.
6. O.E.M. Tie rod ends and adjustment sleeves may be replaced by a minimum .625inch (5/8”) rod end (heim joint) and steel tubes. Stock OEM drag links only. *All cars must have a stock OEM drag link with no alterations.
7. No aluminum, fiberglass, or composite suspension, steering, or rear end parts allowed, except where noted in these rules.
8. No aluminum hubs allowed.
9. Front hub and Rotor assembly must be one piece steel O.E.M.
(12). COIL / LEAF SPRINGS
1. Any coil spring on a car must be minimum 4 ½ inches outside diameter. Coil springs must be steel. Leaf springs may
be steel or composite type.
A. Lowering blocks, rear spring shackles, and rear end drive bars may be steel or aluminum only.
B. No torsion bars allowed in the rear.
2. No hydraulic, ratchet, or electric weight jacking devises allowed anywhere in or on the car.
3. One shock per wheel only Total of 4 allowed (“Dummy” shock absorbers are still considered to be a shock).
4. One (and only one) coil or leaf spring per wheel must be used. Coil springs must be manufactured from magnetic steel. Rear leaf springs (if used) may be either magnetic steel or an approved composite material. All coil springs must be a minimum of 5 (five) inches in diameter.
A. Coil springs must be wound with all coils being the same outside diameter, inside diameter from the top to the bottom of the spring.
B. The coil spring wire diameter must be the same from the top to the bottom of the spring.
C. Coil spacing must be equal.
D. Round coil spring wire must be used.
E. Coil springs with linear spring rates are the only coil springs permitted.
F. Air springs are not permitted.
(12)A. FRONT COIL SPRINGS
1. The top of the front coil spring must be closed end and ground flat.
2. The upper front coil spring mount must be flat and support the top of the spring 360 degrees.
3. The lower end of the front coil spring must be an open end with a maximum gap of ¼ inch between the “tail” of the spring and the next coil.
4. The lower front coil spring mount may have a single step to prevent spring rotation and accommodate the open end of the spring.
A. The step of the lower front coil spring mount must not exceed one (1) inch in height.
B. The lower coil spring mount must be a welded integral component of the lower control arm.
C. When installed the lower end of the front coil spring must be supported 360 degrees.
(12)B. REAR COIL SPRINGS
5. The top and bottom of the rear coil spring must be closed end and ground flat.
6. The upper and lower rear coil spring mounts must support the spring for 360 degrees.
5. One (1) (and only one (1)) coil or leaf spring per wheel is permitted.
A. Actual spring has to stay in contact in lower control arm insert or perch at 360 degrees.
B. Spring must fit flat on the lower control arm at all times at 360 degrees.
C. No ramp and or spring locator welded in lower control arm, and should not exceed one (1) inch.
D. No adjustable Helix.
(13). SHOCKS **
1. Steel Crimped/Spun tube top and bottom, non-adjustable, non-rebuild able, with a $125.00 buyout, this maybe adjusted up during year for inflation. Must have a fixed bearing and can have a removable heim joint. No Schrader valves or remote reservoir shocks of any kind. No gas shocks of any kind. Oil filled only. No Bump Stops.
Some approved shocks include: * If you do have other shocks they must be approved by track tech through USMPA. AFCO-1400 series, 1200 series
Integra-4200 series P/N 310-421XX Pro Shocks- WB Series P/N WBXX ** NO ALTERING OF SHOCKS Track may exchange any shock they believe to be altered tampered with or non-conforming if in fact shock is non-conforming to the rules driver will be suspended 1st time for 2 weeks / 2nd time 1yr of competition from all tracks. One and only 1 shock per wheel only (“dummy” shock absorbers are still considered to be a shock). max 4 shocks anywhere on car
(14). REAR ENDS
1. Any passenger car type or truck type rear ends are allowed. 2. Steel-tube quick change rear ends are allowed. Quick changes are optional, but not mandatory. * Steel axle tubes ONLY.
3. No aluminum birdcages
4. NO split Birdcages. No calipers mounted to Birdcages
5. Birdcages may consist of multiple barrels but must bolt or weld together to work as one (1) single barrel cage. * Limit to one (1) birdcage per side.
6. Shock(s) and radius rods must mount to the birdcage.
7. Floating pivoting and / or rotating mounts and / or brackets of any sort are not allowed. All brackets or mounts attached to the birdcage must be bolted or welded solid.
8. No wide five hubs.
9. Two (2) bars per side of rear end.
A. Total of two (2) bars per side.
B. No springs on / or in bars.
10. No aluminum components allowed except: axle caps, drive plates, pinion plate, and wheel spacers.
11. One (1) piece steel J-Bar. Must be a steel J-Bar. No springs on J-Bar.
12. Pull Bars &/or lift Bars must consist of a solid bar…no springs, no shocks or rubbers.Must be mounted solid on both ends no movable brackets.
(15). BRAKES
1. Must have a working caliper and rotor on each wheel and must lock up all four (4) wheels. All calipers solid mounted on axle tube (no brake floaters).
2. O.E.M. style calipers or stock replacement cast iron or aluminum only. Carbon fiber, aluminum, and solid disc rotors will not be permitted (must be vented). Drilling, lightening and/or any alteration to the brake rotors or calipers will not be permitted. Brake rotors of excessive size or weight when compared to an O.E.M. brake rotor will not be permitted.
3. Calipers must remain stock, GM slide pin mounting in original position
A. Tech will measure @ 5.64” (5 5/8 inch) on center for mount bolts.
B. Cast iron vented brake rotors only. *May not be modified; I.e….scalloped, etc.
C. Front rotors may be re drilled for different bolt pattern and / or larger studs. D. Hubs, rotors, & calipers must maintain minimum OEM dimensions (no lighting)
(16). TIRES AND WHEELS
1. The only tires approved for competition are the Hoosier: M-30S and M-60 RR must run M-60 compound in the DIRTcar plated tire 26.5/8.0/15 or 27.5/8.0/15. The maximum width of the tire will be 9” inches.
2. No Grooving allowed
3. Siping will be allowed but not to excess to cause grooving.
4. Must run the same 4 tires during the entire racing event. this Optional from track to track in 2021 They will be checked and marked during inspection.
5. If the car has a flat, the track tech must approve the replacement tire and mark it accordingly. * The replacement tire must be the same make and compound of the tire being replaced. 6. **No tire softeners, no conditioners, no altering of tires with any natural or unnatural, no hazardous or non-hazardous compounds or chemicals which alter the factory set baseline settings of a given tire.
7.If a protest is requested on a tire: Tire protest fee is $125 (CASH ONLY) per tire to cover any lab fees.
A. The samples will then be sent to the lab. If the lab determines that the tire has been altered from its original composition (non-conforming), the racer forfeits the event purse and points, Should the tire be determined to be conforming and within original factory composition the driver in question will be awarded his purse and points from event in question. Lab results are final.
B. If the driver refuses a protest on a tire then he will automatically forfeit all points and purse money for that racing event.
**If caught chemically altering ANY tires the following will apply**
* 1st offense: any driver with any treated tires will be disqualified for the night and lose all points. you will also be suspended from cometition for 4 weeks month probation. 2nd offense suspended for 1yr from date of offense driver will have to pay each time for tire test and $250 fine before eligible to participate again.
2. Wheels
1. Eight (😎 inch steel wheels only.
A. one (1) inch tolerance for bead locks.
2. Bead locking devices allowed on the right side wheels only.
3. Mud plugs allowed on all wheels. Any mud plug other than foam must be securely mounted to the wheel. Track officials will determine if the mud plug is securely mounted. If using a cover we recommend using plastic covers.
(17). FUEL CELLS
1. Racing fuel cells are required and must be mounted by at least two (2) steel straps, no less than two (2) inches wide X 1/8 inch thick, and all the way around the cell. Using a minimum of two (2) bars around the top, bottom, and sides of the fuel cell.
2. All fuel cells must be mounted securely to the frame.
3. Fuel cells must be enclosed completely in a steel container, mounted behind the rear axle only, and must be protected in the rear by the roll cage tubing mounted securely to the frame or rear bumper.
4. No part of the fuel cell should be lower than the protective tubing.
5. Protective tubing should extend no wider than six (6) on both sides of the fuel cell.
6. Fuel cells must have check valves, and bladders are highly recommended.
7. Fuel cells are limited to 32 gallon maximum capacity. 8. Fuel cells with the fuel pickup located in the top of cell are mandatory. * Bottom feed pickups are not permitted.
9. Retrofitting a bottom feed cell will be permissible, but the bottom feed opening must be plugged and sheet metal covered. * A cap on the exposed bottom fitting will not be acceptable for plugging.
(18). BUMPERS / NERF BARS
1. Bumpers must be used on both, the front and rear of car. Bumpers and nerf bars must be steel.
A. Front bumper must be mounted to both frame horns.
B. Front bumper may be no wider than the frame horns, with two (2) inch tolerance only, to accommodate bumper mounting bracket per side.
2. Rear bumpers and side nerf bars may not extend beyond the width of the rear tires, and must not contain any sharp edges.
3. There shall be no rough edges on any bar or bumper on the car.
4. No straight rear bumpers allowed.
A. The ends of the rear bumper must be bent to form 180 degree bend, or be bent forward in a 90 degree bend.
B. Rear bumper must mount to rear of chassis.
C. Rear bumper may be constructed of round or square tubing, and must protect the fuel cell.
5. Both front and rear bumpers shall be eighteen (18) inches plus or minus two (2) inches from the ground. This measurement is to the “center” of the bumper. This means if your bumper is constructed with its two (2) bars, upper and lower, twelve (12) inches apart, then the center of your bumper is six (6) inches from either the top or bottom. This is where the measurement is taken, at the “center” not the top or the bottom.
6. A bumper which is badly damaged may be required to be repaired or replaced before the car is allowed to compete.
(19) HELMETS & SAFETY EQUIPMENT
1. Helmets are required and must meet a minimum standard rating of Snell SA2015 or SA2010. If no sticker is present track officials must and will assume the helmet does not meet the required standards and the helmet will not be allowed. Helmet must accompany the race vehicle at time of inspection.
2. Fire Suits
1. SFI 3.2A/5 minimum rating approved full fire suits of a flame retardant material must be worn by all competitors at all times. Two (2) piece fire suits are allowed.
2. Fire suit must be in good operable condition.
3. Fire suits with holes in the suit, liquid oil/grease stains and / or do not fit properly are unsafe and Tech officials may determine the suit is not suitable for race competition.
4. Fire retardant gloves and shoes are highly recommended.
3. Fire Suppression
1. Fire suppressant system is highly recommended. We Recommend
A. Cylinders mounted forward of the fuel cell.
B. Cylinders securely mounted to the frame/roll cage assembly. C. The certification label unobstructed and easily accessible for inspection when the mounting is complete.
D. The cylinder connected to the nozzles with steel or steel reinforced lines.
E. One (1) nozzle located directly above the fuel cell in the fuel cell area and the second nozzle must be located in the driver cockpit area.
F. You may have a 5lb. or 10lb. system.
G. Must be DOT / SFI approved. NO TOLERANCE. Fire systems are good till manufacture specs.
4. If no fire suppressant system then a minimum 2lb Fire Extinguisher will be mandatory.
5. Fire Extinguishers must be securely mounted and accessible. 6. Belts
1. Competition type seat belts are required. Lap Belts, Shoulder Belts, and Submarine Belts are required. *No factory type seat belts may be used.
2. Metal to metal buckles required on shoulder and seat belts.
3. All belts must be dated no more than three (3) years old.
A. If not dated, officials must and will assume the date has expired and they will not be allowed.
B. The ONLY recognized date will be the manufactured date as stamped on the seat belt manufacturers tag.
C. No sales receipt will be recognized. Example: If a car is inspected in May of 2022, the seat belts can be dated no earlier than May 2019.
D. Driver will be given one (1) warning to get belts replaced before the next racing event. The second warning-the belts MUST be replaced before the car will be allowed to participate in any further competition activities.
E. Damaged belts will be required to be replaced regardless of the date tag on the belts.
7. Window Nets
1. Window nets are highly recommended.
8. Neck Restraint Devices
1. Neck Braces are mandatory unless a Hans Style restraint system is being used.
9. Rock Guards
1. Rock guards shall end at the point perpendicular to the steering wheel.
(20) RADIO COMMUNICATION
1. No type of radio communications are permitted except for Raceivers.
(21). Kill Switch / Battery
1. A kill switch is required.
2. Switch must be clearly marked and located within easy reach of the driver, and safety crews must be able to reach the switch when standing outside the car.
3. All cars must have a battery and be self-starting.
4. Battery must be securely mounted.
5. Battery cannot be mounted inside the drivers’ compartment.
6. Only one (1) American passenger car 12 volt battery, no resister to slow crank
(22). Exhaust
1. Duel exhaust only.
A. No “Y” pipes or 180 headers.
B. Try “Y” headers are not acceptable.
2. Aftermarket headers are permitted.
3. No Oxygen sensors allowed.
4. Exhaust systems must be mounted in such a way as to direct spent gases away from the cockpit of vehicle, and away from areas of possible fuel spillage.
5. Exhaust system(s) must remain completely below the interior deck of the car.
6. The entire exhaust system (including the exhaust pipe and /or header exits) must be inside all parts of the body and outlets are to be no higher than the mid line of the body sides.. The only breach of any interior or exterior body
panel that will be permitted is for the routing the left side header or exhaust pipe on the left side of the car.
7. When routing the left side header or exhaust pipe through the left side firewall a maximum of ½ inch clearance around the header or exhaust pipe will be permitted.
8. Track officials may require turn downs on the collectors.
9. Mufflers are recommend, and may be required at some tracks.
(23). CAR NUMBER 1. Car number must appear on both sides of the car and the roof, a minimum of eighteen (18) inches tall and nine (9) inches wide, per number
2. The number must also appear on the nose and fuel cell of the car a minimum of six (6) inches tall.
A. Number must be a contrasting color to the car.
(24). Fuel
A. Gasoline only. * NO ALCOHOL
B. Only pump gas is allowed includes race gas & E85.
C. No Nitrous Oxide
D. No additives of any kind.
(25). No rear spoiler allowed.
(26). Must run the official decal of USMPA on upper front of both doors
(27) UNLESS OTHERWISE NOTED IN THESE RULES CHASSIS & BODIES will follow current published UMP rules. https://dirtcar.com/rules/dirtcar-modifieds/
You can compete for Championship points and a trophy in the West by competing in minimum 2 events per track in the west region on any night they are running your best 2 nights at each track total 14 nights count towards the USMPA Championship we only count feature points 1st 48 points 2nd46 points 3rd 44 points and so on.
THE 8 WEST TRACKS.
MOLER RACEWAY PARK , PORTSMOUTH RACWAY PARK, ATOMIC SPEEDWAY, 35 RACEWAY, BRUSHCREEK MOTORSPORTS COMPLEX, WILLARD SPEEDWAY, MUDLICK VALLEY RACEWAY

Hornet Rules

RULE BOOK DISCLAIMER

The rules and/or regulations set forth herein are designed to provide for the orderly conduct of racing events and to establish minimum acceptable requirements for such events. These rules shall govern the condition of all events, and by participating in these events, all participants are deemed to have complied with these rules. No express or implied warranty of safety shall result from publications of or compliance with these rules and/or regulations. They are intended as a guide for the conduct of the sport and are in no way a guarantee against injury or death to a participant, spectator or official.

The race director shall be empowered to permit minor deviation from any of the specifications herein or impose any further restrictions that in his opinion do not alter the minimum acceptable requirements. No expressed or implied warranty of safety shall result from such altercation of specifications. Any interpretation or deviation of these rules is left to the discretion of the officials. Their decision is final.

Engine

  1. Only three (3) or four (4) cylinder in-line engines will be permitted.
  2. Engine must match the make of the car being used in competition.
  3. Aftermarket and/or racing-type cylinder heads will not be permitted.
  4. High performance and/or sports car engines of any type will not be permitted.
  5. Turbo charged and/or super charged and/or rotary engines and/or engines originally designed with a variable cam-timing system will not be permitted.
  6. No after market intakes or throttle bodies, must be OEM part from same make [gm to gm, forf to ford and ext] 

Electronics and Ignition System

  1. Only 12 volt ignition systems will be permitted
  2. Traction control of any-type will not be permitted.
  3. Batteries:
    1. Only one twelve (12) volt battery securely mounted will be permitted.
    2. The battery must be securely mounted with positive fasteners and brackets.
    3. The battery terminals must be insulated or enclosed with a non-conductive material that will prevent contact with any part of the race car should the battery become dislodged from the battery mount.
    4. If the battery is located in the driver’s compartment, it must be in a marine type case. The case must be securely mounted to the frame, either directly or by means of a steel rack. The steel rack must be constructed of minimum 1″ square tubing, and be securely welded to the frame or cage in a manner that will not allow the box or rack to move. An additional metal strap or bar must secure the marine type case to the rack or frame. All bolts must be secured through steel tubing or the frame of the car. Bolting through the body or floor pan is not sufficient. 
    5. One (1) mandatory battery disconnect switch must be installed. The switch must be clearly labeled with off/on direction. The switch must be directly in-line with the NEGATIVE battery cable and be capable of completely disconnecting the NEGATIVE terminal of the battery from the race car. Negative or “ground” wiring connections must not be made anywhere from the battery negative terminal to the input side of the disconnect switch. 
  4. Only stock OEM starters in the OEM location will be permitted.
  5. Only one aftermarket tachometer, oil pressure and water temperature gauge(s) will be permitted.
  6. The vehicle computer (ECU) must be mounted in a visible location providing ease of inspection.
  7. An electrical engine shut off switch is required. The switch must be clearly labeled and within the reach of the driver.

Exhaust System

  1. Headers are permitted. 
  2. Removal of the catalytic converter, air conditioning compressor and smog pump will be permitted.
  3. Mufflers are required.

Engine Compartment

  1. The engine and radiator must be OEM and mounted in the stock OEM location for the year, make and model of the car in competition.
  2. Solid engine mounts and/or safety chains will be permitted.
  3. Accumulators and/or accusumps will not be permitted.
  4. Reinforcing will not be permitted with the exception of the front strut bar.

Transmission & Driveline

  1. The transmission and/or transaxle must remain OEM and unaltered for the year, make and model of the car in competition.
  2. All forward and reverse gears must be operational.
  3. The flywheel, flexplate, clutch and/or torque converter and/or assembly must remain unaltered and OEM of the year, make and model of the car in competition.
  4. Mini-type clutches and/or couplers will not be permitted.
  5. Transmission coolers in the driver compartment will not be permitted.
  6. Torque dividing final drive systems will not be permitted.
  7. Locked differentials of any type will not be permitted. Locking of transmission by welding of gears is allowed.
  8. A minimum one (1) inch inspection hole must be located in the bell housing.
  9. All Axle shafts must be painted white

Chassis/Frame

  1. All chassis and frames must remain unaltered and OEM. Any front wheel drive, compact car frame will be permitted.
  2. A maximum wheelbase of 107-inches will be permitted.
  3. The magnetic steel floor pan must remain unaltered and OEM. Any work that is done in the form of patches must be completed with magnetic steel.

Roll Cage

  1. Unless otherwise noted all tubing utilized in the construction of the roll cage must be 1.50-inch Outside Diameter, .095-inch thick magnetic steel tubing.
  2. A six-point, full perimeter cage, using 1.50-inch Outside Diameter, .095-inch thick magnetic steel tubing is required.
  3. The rear hoop must have bracing that crosses in an ‘X’ configuration. Rear kick up supports are required.
  4. A minimum 1.25-inch outside diameter cross bar is required across the top of the halo bar.
  5. The roll cage must be securely fastened (welding is required) utilizing a minimum of .250-inch plating to mount cage to the frame. Only magnetic steel will be permitted. Iron, galvanized pipe, fittings, square tubing, brazing and/or soldering will not be permitted.
  6. A minimum of three (3) door bars on the driver side and two (2) door bars on the passenger side, mounted in a horizontal manner will be required. Vertical bracing from the top-to-the-bottom of the door bars on both sides is required.
  7. A minimum of three (3) windshield bars and protective screen will be required in front of the driver.
  8. The driver compartment must be sealed completely from the track, the engine and the fuel cell. The front and rear firewalls must remain and any holes must be patched with magnetic steel.
  9. Mirrors will not be permitted.
  10. Gutting of the car will not be permitted with the exception of clearance for the roll and door bars.
  11. All material considered flammable including airbags must be removed.
  12. The interior must remain open.

Weight

  1. Additional weight of any type will not be permitted. Any item(s) that are deemed to provide additional weight must be removed.

Fuel Cells and Fuel

  1. The fuel system must be complete, unaltered and OEM for the year, make and model of the car in competition.
  2. Only standard pump gasoline will be permitted for competition. A maximum of 93 octane. Performance additives will not be permitted.
  3. The gas tank/fuel cell may be mounted ahead of the rear axle with a minimum 1/8-inch shield mounted under it. The shield must be securely mounted. If the shield becomes loose or falls off the car, the car and driver will be disqualified for the entire event. 
  4. The RECOMMENDED gas tank/fuel cell arrangement is the following:
    1. If the gas tank/fuel cell is mounted behind the rear axle the gas tank/fuel cell MUST be replaced with a maximum eight (8) gallon fuel cell that meets or exceeds FIA/FT3 or SFI 28.3 speciications located to the trunk area of the car. Those who choose to use this option MUST install and use the cell in accordance with the FIA/FT3 or SFI 28.3 specification, and cannot alter the cell in any way. NO OTHER TYPE OF FUEL CELL IS ALLOWED IN THIS LOCATION.
    2. All cells must be mounted to a 1″ x 1″(minimum) square tubing frame that is welded to frame supports. Minimum of 4 – 2″ steel straps completely around cell.
    3. The trunk area must have a firewall between it and the driver’s compartment that is completely sealed. 
  5. A fuel cell vent, including cap vent, must have a check valve. If the fuel cell does not have an aircraft-type positive seal filler neck, then a flapper, spring and/or ball type filler roll-over valve is mandatory.
  6. External electric fuel pump wired to the ignition switch with aftermarket fuel cell will be permitted.
  7. All cars must be equipped with an fuel pump safety oil pressure switch.
  8. Cool cans will not be permitted.
  9. Fuel lines that pass through the driver compartment must be magnetic steel.

Body

  1. Any front wheel drive, compact car will be permitted for competition. Station wagons, convertibles, trucks, and/or two seat cars will not be permitted.
  2. The body must remain unaltered and OEM in appearance. After market bumper covers allowed [no wedge stile bumper covers permitted]
  3. The inner fenders must remain unaltered and OEM. Removing of the inner fenders will not be permitted.
  4. The hood and trunk lid / hatchback must be positively and securely fastened.
  5. All doors must be positively and securely fastened. Must be welded if possible.
  6. All glass, exterior lights, chrome and/or plastic trim and hood insulation must be removed.
  7. The dashboard may be removed.
  8. Front and rear bumpers must be positively and securely fastened. Welded, chained and/or cabled to the frame will be permitted.
  9. A front and rear tow hook easily accessible will be required.
  10. Can use OEM or AFTER MARKET front and rear bumper cover [NO WEDGE STYLE BUMPER COVERS] bumper covers must remain on the vehicle, but may be altered to allow for tow hook.
  11. A maximum seven (7) inch sun visor will be permitted.
  12. The opera windows may be closed and/or sealed. No closing, sealing, or blocking of side windows in front of the B post. Moving window frames to change the factory sizing will result in disqualification.

Suspension

  1. All components and mounts must remain unaltered and OEM and must match the year, make and model of car in competition.
  2. Weight jacks, modifications, racing components, aftermarket or homemade traction devices will not be permitted.
  3. The car must remain in alignment from front-to-rear and must track straight. Rear steel allowed. Maximum one 1/8″ thick washer per bolt.  
  4. A maximum of 5 degrees of camber will be permitted on any wheel.
  5. Center mounted steering will not be permitted.
  6. A quick release, aftermarket steering wheel will be permitted. The steering column must remain OEM and unaltered.
  7. Aftermarket remote reservoir power steering will not be permitted.
  8. All shocks and struts must remain unaltered and OEM in the OEM location.
  9. Spring rubbers will be permitted.

Brakes

  1. All brake components must be unaltered, OEM, magnetic steel and operative on all four wheels. 3 wheel braking permitted with right rear safety hub. 
  2. Disc and/or drum brakes will be permitted and they must match the year, make and model of the vehicle in competition.
  3. Only OEM Master Cylinders in OEM location will be permitted.
  4. Brake shut off and/or valve bias adjuster(s) will not be permitted.
  5. Only magnetic steel brake lines will be permitted.

Wheels and Tires

  1. Only OEM DOT 13, 14, 15 or 16-inch passenger tires will be permitted. Racing, mud, and/or snow tires will not be permitted. Mixing of sizes is allowed. 
  2. Alterations of any type including re-caps, softening, chemical alteration, conditioning, siping and/or grooving will not be permitted.
  3. All wheels must be OEM steel or aluminum wheels with a maximum width of seven (7) inches and a standard bead. Beadlock allowed on Right Front wheel only.
  4. Racing wheels are permitted. Maximum seven (7) inches width. 
  5. Wheel spacers and/or bleeder valves will not be permitted.
  6. Wheel reinforcement is strongly recommended.
  7. One (1) inch Outside Diameter magnetic steel lug nuts on steel wheels are required.

SAFETY EQUIPMENT

Safety equipment specifications listed below are listed as a guide and are only a minimum standard. These minimum standards may not be sufficient enough to protect a driver from injury or death from some incidents. It is the responsibility of the driver, car owner, and crew to ensure that the safety equipment on the car is properly installed, working as intended, and is sufficient to protect the driver from any incidents that occur. This may include using safety equipment that goes above and beyond the minimum specifications and recommended equipment listed below.  

  1. Seats:
    1. Full containment type seats constructed of aluminum to the general design specifications of SFI 39.2 standards are highly recommended. Design should include comprehensive head surround, shoulder and torso support system, energy impact foam, and removable head foam.
    2. Up fitting a current seat with bolt on kits will be permitted with a seat manufacturer produced kit and a base seat acceptable to the seat manufacturer. Components should include comprehensive head surround, shoulder and torso support system, energy impact foam. Must be installed in accordance to seat manufacturer’s instructions. 
    3.  Seats must be used as supplied and instructed by the seat manufacturer with the exception of trimming the length of the left side head surround for the purpose of egress only. If the left side head surround is trimmed to a distance that is less than the most forward surface of the drivers helmet (usually the area crossing the chin) then a left side head net meeting the SFI 37.1 must be installed with a quick release latch.
    4. Seats must be mounted to a seat frame that is welded to the race car frame/roll cage structure. Attaching points, angles, and materials for the seat frame and mounting of the seat to the seat frame must be in accordance to the seat manufacturer’s instructions.
    5. The seat must be mounted a minimum of 30” (inches) from the center of the rear end, measured at the bottom of the seat.
  2.  Restraints:
    1. The use of a 5, 6 or 7 point driver restraint system certified to SFI Spec 16.1 or 16.5 is REQUIRED no exceptions. All driver restraint systems shall not be in excess of 3 years of age past the date of manufacture. The use of a 7 point driver restraint system is strongly recommended. All mounting points of the racing harness MUST be mounted properly in accordance with the manufacturer’s instructions, and securely mounted to the chassis with the use of grade 5 or better hardware.
  3. Window Nets:
    1. Window Nets certified to SFI Spec 27.1 are REQUIRED and must be mounted in accordance with the manufacture’s instructions and technical director’s satisfaction.
  4. Driver Worn Equipment:
    1. A helmet certified to Snell SA2010/FIA-8860, Snell SA2015/FIA-8860, SFI 31.1/2010 or SFI 31.1/2015 is REQUIRED.
    2. A driver suit certified to SFI Spec 3.2A/5 is REQUIRED.
    3. Gloves certified to SFI Spec 3.3/5 are REQUIRED.
    4. Socks and Shoes certified to SFI Spec 3.3 are REQUIRED.
    5. Head and Neck Restraint Devices/Systems are Highly Recommended
    6. At all times during an Event (practice, qualifying, and competition), drivers must connect their helmet to a head and neck restraint device/system certified to SFI Spec 38.1. The device/system must display a valid SFI Spec 38.1 label.  The head and neck restraint device/system, when connected, must conform to the manufacturer’s mounting instructions, and must be configured, maintained and used in accordance with the manufacturer’s instructions
  5. Cockpit Area:
    1. No sharp or protruding edges in or around the cockpit, which would impede the driver’s rapid exit from the car.
    2. Windshield screens mandatory. Screens must be securely fastened.
    3. Flame retardant seat, roll bar, knee and steering pads or padding are recommended.
  6. Fire Suppression:
    1. An in-car Fire Suppression system is Highly Recommended.
    2. All race cars should be be equipped with a thermally deployed automatic fire suppression system. The fire suppression system will consist of a DOT approved cylinder manufactured from aluminum or steel with a capacity of ten (10) lbs. of fire extinguishing agent, steel or steel reinforced lines, and two (2) thermally activated discharge nozzles.
    3. All systems must meet or exceed SFI 17.1 specifications.
    4. Systems must be fully charged with ten (10) lbs. of DuPont FE-36, 3M NOVEC 1230, or Fire Aide and display a legible and valid SFI and manufacturer label depicting fire extinguishing agent, capacity, and certification date. Cylinders that or beyond useful certification date must be inspected, serviced and re-labeled by the manufacturer.
    5. Cylinders must be mounted forward of the fuel cell. Cylinders must be securely mounted to the frame/roll cage assembly. The certification label must be unobstructed and easily accessible for inspection when the mounting is complete.
    6. The cylinder must be connected to the nozzles with steel or steel reinforced lines.
    7. Two (2) thermally activated nozzles must be used. One (1) nozzle must be located directly above the fuel cell in the fuel cell area and the second nozzle must be located in the driver cockpit area.
    8. An optional manual override cable may be added to the system.
  7. Drivers under the age of 18 are REQUIRED to have a HEAD SOCK, window net, gloves, and either a neck collar or a head and neck restraint system in addition to all other required safety equipment in place.

MISCELLANEOUS 

  1. NO two-way radios. No crew to driver radio or transmitted communications of any kind.
  2. NO “in-cockpit driver controlled” electronic devices of any kind permitted.
  3. NO computer controlled devices of any kind permitted
  4. NO rearview mirrors of any kind permitted.
  5. Raceceivers are mandatory at all times. 
  6. Electronic scoring is used to score all laps of all races. The scoring order of the electronic scoring system will me used for all positions and all laps unless an error occurs. This will be at the judgement of race officials only.
    1. A Westhold style transponder is mandatory at all times. 
    2. Transponder must be located at the rear axle tube/crossmember.
    3. Mounting the transponder at any other location can result in disqualification, loss of positions, or other penalties.
  7. Any driver without a valid driver’s license must be approved in advance by speedway officials before being allowed to compete.
  8. Any driver competing in any other division will not be allowed to compete in the Hornet division for the remainder of the season.
  9. To preserve the economical nature of the division there will be a claim rule in effect.
    1. Any driver who finishes on the lead lap of the feature and has competed in at least 50% of the events ran during the season may claim the winning driver’s car for $500 cash plus exchange of the claiming driver’s car. All claims must be made to speedway officials immediately after the feature event. The claim may be made by the driver only and they must have cash in hand.
    2. The car may be claimed by speedway officials for $1,000. This claim can and will be used to prevent any one car from dominating the division. Any car claimed this way will be auctioned off at a future event.
    3. The claim does not include any of the following; Seat, seatbelts, any other permanently mounted safety items and/or aftermarket fuel cell and/or electronic fuel pump.
    4. Any driver refusing to allow his car to be claimed will be disqualified for the night in question and be barred from competition for the next 4 events.
    5. No driver’s car may be claimed in their first night of competition during a season.
    6. No claims will be allowed during the last two scheduled points events of a season.