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OPEN WHEEL MODIFIED

Updated: 4/11/23

THIS IS BUCKSHOT SPEEDWAY'S OFFICIAL OPEN WHEEL MODIFIED CLASS RULESET. YOUR CAR MUST LEGALY MEET THESE STANDARDS AND DEMINSIONS IN ORDER TO PASS TECH INSPECTIONS. IF YOUR CAR IS NOT WITHIN OUR ASSIGNED RULESET STANDARDS, YOU WILL BE DISQUALIFIED, NO MATTER YOUR FINISHING RACE POSITION.

 

IF SOMETHING IS NOT MENTIONED IN THIS RULESET, WE DO NOT ALLOW IT!
 

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These rules are based on Crate Racin' USA Modified Sportsman Division.

SAFETY RULES
  1. Safety is the primary responsibility of the RACER!!
  2. Series recommends Drivers have a SFI-Approved full fire suit (top and bottom), gloves, and shoes. Full Fire Suit (top and bottom or one-piece) is required (SFI rating optional, but highly recommended).
  3. Snell rated SA2010 or SA2015 full-face helmet required.
  4. Series recommends the use of a head and neck restraint system, but is not required.
  5. All cars must have a fully charged fire 2 lb. extinguisher mounted within reach of the driver. Series recommends a 5 lb. halon system.
  6. All cars must have a kill switch within easy reach of the driver, and clearly marked “Off” and “On”.
  7. All cars must have a quality fuel cell with roll over valve(check valve) in fuel cell vent.
  8. Minimum three(3) inch wide, two(2) inch if using head and neck restraint, SFI-Approved five point safety belts, mounted securely to the roll cage. (Recommend belts be no more than two years old.)
  9. Any pre-race technical/safety inspection and car or equipment is deemed unsafe by officials will result in not being allowed to compete. Official’s decisions are final!
  10. All track specific general safety rules or requirements will apply at all times to all participants(i.e. window nets, gloves, door plates, head and neck restraints, etc.) at that track. RaceCeiver one way radios are REQUIRED at every sanctioned event. Failure to have a RaceCeiver(or equivalent one-way device) could result in disqualification. Malfunction of such device (i.e. dead battery, ear phone failure, etc.) will not constitute any penalty.
  11. NO two-way radios, cell phones, or other communication devices will be allowed. RaceCeiver is the ONLY communication device permitted AND IS MANDITORY. Drivers caught with any other communication device will be disqualified for that event (heat or feature). No lighted signal devices(light sticks, flashlights, cell phones, etc.)
  12. No mirrors are allowed at any location on the car.
  13. ALL weight/lead must be painted white and include the car number. Weight must be securely fastened to the car with a minimum two (2) ½” diameter bolts. No weight may be attached to the back bumper. Losing weight in any race (i.e. heat, b-main, feature) will result in disqualification for that event.
ENGINE OPTION #1
  1. Chevrolet Performance Part #88958602/19258602/88858602 (CT 350) Commonly referred to as “602” engine.
  2. These engines are sealed at the intake manifold, cylinder head, front cover, and oil pan with special Chevrolet Performance cap seals, which are installed at the Chevrolet Performance factory.
  3. The ONLY seals allowed for competition are:
a. GM twist off bolt engines will NOT be legal.
b. Chevrolet Performance cap seals
c. Crate USA Gen IV(Green) or Gen V(Black) cable seals, RUSH cable seals, IMCA cable seals allowed.
d. NO ACAS, NDRA, FASTRAK, Crate USA Gen I (Silver), Gen II (Blue) or Gen III (Yellow) will be allowed.
e. To compete with ANY other seal/sealing system contact Crate Racin’ USA for approval.
  1. These sealed engines must not be altered, modified, or changed from factory specs. The sealed engines must remain intact and not tampered with.
  2. Any seals that have been removed or tampered with will make the engine illegal and not eligible for competition. The penalty for anyone tampering with seals, modifying any internal engine parts, or changing the parts from stock as delivered sealed from the factory will be subject to expulsion from racing in any Crate Racin’ USA sanctioned event for the remainder of the season and future seasons, as determined by officials.
  3. No changes are allowed to the engine including the intake manifold, heads, valve covers, front cover, oil pan, harmonic balancer, or any other part(s) on or in the engine.
  4. No vacuum pumps. No evac systems of any type, including but not limited to the breather system style.
  5. Engine’s Chevrolet Performance serial number, and when applicable, Crate USA build certification number, must be clearly visible to series technical inspectors.
  6. Driver’s finishing in the top 5 may claim/purchase the engine of any car finishing ahead of them. Claim fee is $3,800. Engine claimed will be just as it comes from Chevrolet Performance and WILL NOT include any accessories, carburetor, water or fuel pump, wires, distributor, etc. Refusal of claim will result in immediate disqualification and penalized the same as an engine that was found illegal inside the seal system (infraction penalty #1 below).
ENGINE CLAIM PROCEDURE
  1. Competitor, either driver or car owner, finishing in the top five of the feature race, must hand a Crate Racin’ USA or track official $4,200 cash or current cost from dealer (Newsome Raceway Parts), whichever is greater, within five (5) minutes after the checkered flag falls on the feature race.
  2. Engine will be removed, confiscated, and inspected by CRUSA officials at an agreed upon time and place upon being claimed. If legal, competitor claiming engine will receive the engine and will have to have engine re-sealed by a certified rebuilder of their choice. Series will provide seals for re-sealing. If engine is found to be illegal, driver being claimed will be penalized as outlined in infraction penalty #1 below and claiming driver will receive refund of their claim money.
ENGINE OPTION #1 INFRACTION PENALTIES
  1. Any violation of the engine rules and/or factory specs inside the sealing system of the engine will result in the driver and/or owner being disqualified from that event and suspended from series competition for 365 days and pay a $1,000 fine. After that period, the driver can only compete in series events with an engine equipped with original factory GM seal bolts, CP cap seals, or Crate USA seals from an authorized rebuilder approved and authorized by Crate Racin’ USA officials. Driver and/or owner will be notified in writing of series’ decision, via certified mail. All official’s decisions are final.
  2. Any violation of the engine rules and/or factory specs outside the sealing system of the engine will result in the driver being disqualified from that event. Driver and/or owner may be suspended from series competition for up to but not more than 30 days and fined up to but not more than $500 at series’ officials’ discretion. Driver and/or owner will be notified in writing of series decision. All decisions are final.
ENGINE OPTION #2
  1. 362 cubic inch maximum, factory steel production blocks.
  2. Any cast iron 23* steel heads. No porting or polishing of cylinder head. No aluminum heads.
  3. Max valve size: 2.02” intake, and 1.6” exhaust.
  4. Any intake manifolds. No porting or polishing.
  5. Steel or cast cranks and rods. No exotic material cranks or rods (ex.: aluminum or titanium)
  6. Flat top pistons only.
  7. Any flat tappet camshaft only. No roller cams.
  8. Timing chains only. No gear drives.
  9. Stud mount rockers only. No stud girdles.
  10. Stock diameter valve springs only. 1.260” maximum O.D. Beehive springs allowed, 1.320” maximum O.D., ANY manufacturer (Chevy, Ford, or Dodge). NO double valve springs.
ENGINE OPTION #2 INFRACTION PENALTIES
  1. Any violation of the engine rules and specs internally or within the seal of the engine will result in the driver and/or owner being disqualified from that event and suspended from series competition for 365 days and pay a $1,000 fine. Driver and/or owner will be notified in writing of series decision. All decisions are final.
  2. Any violation of the engine rules and/or factory specs outside the sealing system of the engine will result in the driver being disqualified from that event. Driver and/or owner may be suspended from series competition for up to but not more than 30 days and fined up to but not more than $500 at series’ officials’ discretion. Driver and/or owner will be notified in writing of series decision. All decisions are final.
ENGINE PROTEST
  1. Protest fee for a complete tear down on an engine that finishes the feature event is $1,000. Complete tear down is the only option available. The protest fee must be paid to the race director or technical director, in cash, within 10 minutes after the checkered flag has fallen on the feature. Must finish in the top 5 to be eligible to protest. $100 of protest fee will go to the track. $200 will go to the series. Remainder of the protest money ($700) will go to the winner of protest. Any part or parts found to be illegal will be confiscated.
  2. Any time an engine is protested, and driver/car owner accepts the protest and agrees to tear down, the engine being protested, along with the carburetor, must be removed and impounded by racetrack immediately. Arrangements for Crate Racin’ USA Technical Director to inspect engine will be made, and parties involved will be made aware of time and location of inspection that is suitable to all. Any refusal for removal, impound, or inspection will result in disqualification.
  3. There will be NO counter/reverse protesting or claims allowed (cannot protest car finishing behind you).
  4. Any Crate Racin’ USA sanctioned track is authorized to call for or arrange an engine inspection by the Technical Director at any time. If this occurs, track will remove the engine and carburetor, and impound until arrangements can be made to inspection time suitable for all involved.
  5. If an engine is torn down by series’ or track officials, and not protested by another driver, series will provide gasket set and Crate USA engine seals to the Certified Rebuilder of choice, of the driver being torn down.
  6. Only two (2) people from the car being protested, and the driver filing the protest will be allowed in the determined tech area during any tear down. Driver initiating the protest must be present, unless extreme circumstance and arrangement is made with officials. All official’s decisions are final.
  7. Failure and/or refusal to tear down any engine or refusal to allow your car to be inspected by series officials at any time will result in a 365-day suspension and a fine in an amount to be determined by series officials.
ENGINE SETBACK
  1. Engine bell housing flange to center of axle tube – 70” minimum
CARBURETOR
  1. Engine Option #2 – 500 CFM 2 barrel only.
  2. 2 Barrel carburetor will be checked with go-no-go gauges top to bottom.
  3. Either engine Option may run 1” maximum carburetor spacer, .040” tolerance. At no point may spacer extend into intake manifold area. Two (2) standard thickness carburetor gaskets, .070” maximum thickness allowed.
  4. Engine Option #1 – may run one (1) four-barrel carburetor only. Chevrolet Performance 602 Circle Track Engines perform best with a quality 650 CFM carburetor.
  5. All carburetors (for both engine options) must have conventional style floats along with needles and seats. NO individual cylinder tuning or equivalent allowed.
  6. All carburetors (for both engine options) must have conventional “Holley-style” straight or down leg boosters. NO exceptions. NO super bowl type carburetors allowed.
FUEL, FUEL CELL, FUEL PUMP
  1. An approved fuel cell must be securely mounted in the trunk area of the car, inside a .20 gauge metal box supported by a minimum of 2” x 1/8” steel straps.
  2. Gasoline, Racing Gas, or E-85 fuel allowed. No methanol or alcohol. None of the following chemicals are allowed in any fuel used for competition: No nitrous oxide, propylene oxide, nitroethane, MTBE, hydrazine, or ethylhexanol.
A. Gasoline or Race Gas – specific gravity NOT to exceed .744 at 60 degrees. Any gasoline or race gas with a specific gravity of .745 or greater will be disqualified. Fuel is subject to testing on site, or fuel samples may be taken and sent to an independent lab for testing.
B. E-85 – specific gravity not to exceed .7855 at 60 degrees. Any E-85 with a specific gravity of .7856 or greater will be disqualified. Fuel is subject to testing on site, or fuel samples may be taken and sent to an independent lab for testing.
C. It is the competitor’s responsibility to know what is being put into their fuel cell.
  1. VP Racing Fuels and Lubricants is the Official Fuel and Lubricant of Crate Racin’ USA. We encourage competitors to find your local VP Racing Fuel dealer as their products are proven to be most consistent and always “Makin Power”.
  2. Drivers finishing in the top 5 may protest the fuel of car or cars finishing ahead of them. Protest fee is $150. Driver filing protest must have money with them and notify track or series official within 5 minutes of the checkered flag in that event. Fuel sample(s) will be taken and sent to an independent lab chosen by the series for testing. All official’s decisions and lab results are final and official.
  3. Penalties for any illegal fuel are as follows:
a. First Offense - $500 fine and 30-day suspension from any Crate Racin’ USA sanctioned events
b. Second Offense - $1,000 fine and 90-day suspension from any Crate Racin’ USA sanctioned events
c. Third Offense - $2,000 fine and 365-day suspension from any Crate Racin’ USA sanctioned events.
d. ALL OFFICIAL’S DECISIONS ARE FINAL, AND INDEPENDENT LAB USED WILL BE AT SERIES’ DISCRETION.
  1. Mechanical fuel pump only. Must be mounted in stock location
EXHAUST
  1. Collector type headers required. Must have four (4) tube into one (1) collector.
  2. Mufflers not required, UNLESS track mandates them. If mandated, mufflers must have some type of internal noise dampening characteristics i.e. baffles, extruded holes, screen, chambered, etc. Mufflers must meet local speedway’s noise decibel requirements.
  3. No tri-y headers or merged headers allowed.
  4. No square tube headers.
WEIGHT
  1. Cars equipped with Chevrolet Performance 602(Engine Option #1) must weigh 2,400 lbs.
  2. Cars equipped with engines falling under Engine Option #2 Rules must weight 2,600 lbs.
  3. All cars will be allowed a 1 lb. per green flag lap burnoff allowance at the completion of any race (example: 8 lap heat race = 8 lb. allowance).
  4. Each track’s on-site scales will be the official scales used to determine the official weight of each car.
  5. ALL weight/lead must be painted white and include the car number. Weight must be securely fastened to the car with a minimum two (2) ½” diameter bolts. No weight may be attached to the back bumper. Losing weight in any race (i.e. heat, b-main, feature) will result in disqualification for that event.
DISTRIBUTOR
  1. No magnetos.
  2. MSD is ok – 6AL or 6ALN MSD box ONLY.
  3. Series or track reserve the right to change MSD boxes with any car at any time.
  4. No electronic traction control devices allowed. MSD box may be confiscated by series at any time.
  5. Drivers finishing in the top 5 may protest another top 5 finishers box for $100. Series keeps $100 protest fee.
STARTER
  1. All cars must have a starter in working order. Starter must be mounted in stock location. NO reverse mount starters.
WATER PUMP / POWER STEERING
  1. Stock type cast or aluminum water pump permitted.
  2. No electric water pumps.
  3. Manual fans only. No electric fans.
  4. No reverse mount power steering pumps.
TRANSMISSION / DRIVELINE
  1. No straight/direct drives. No in or out boxes.
  2. Bert, Brinn, or equivalent ok.
  3. Drive shaft loop mandatory on all cars. Must be mounted 5” to 8” behind front U-joint of drive shaft.
  4. All drive shafts must be painted white for safety.
ROLL CAGE
  1. Must be constructed of minimum 1.05” O.D. steel tubing, with a minimum wall thickness of .095”.
  2. Minimum of 3 door bars, minimum of 1.05” O.D. steel tubing and .083” minimum wall thickness on driver’s side.
  3. Minimum of 2 door bars on passenger side
  4. Driver’s head/helmet should not protrude outside of cage with helmet on.
BODY
  1. See 2021 Body diagram/Specifications for specific body measurements.
  2. Full size fiberglass or aluminum roofs. No dished roofs.
  3. Cars may NOT run topless. Topless races will not count for points, unless approved in advance by Crate Racin’ USA officials, in which drivers will be given notice. These exceptions will be a rare occasion, or long-standing event, and not acceptable on a regular basis.
  4. Sail panels – must be solid and meet specifications in attached diagram. Must be mounted within 2” of outside edge of interior deck.
  5. Rear spoiler – 4” maximum material height and maximum 67” wide. Maximum three (3) spoiler braces allowed, must be mounted in line, of equal material. No wings, lips, or fins of any type allowed.
  6. Aluminum nose panel must be flat, with a maximum 2” side fins allowed on nose.
  7. Engine compartment must remain open, with no side panels.
  8. Nose pieces may be maximum 42” width, centered between frame rails, and must not extend past the leading edge of the front bumper.
  9. No rub rails, or any bars of any type outside of the tires/body panels allowed.
WHEELBASE
  1. Minimum 108”, maximum 112”.
ALL SUSPENSION
  1. No data acquisition devices of any type allowed.
FRONT SUSPENSION
  1. No spring rubbers.
  2. Stock lower control arms must be mounted in stock location. May also use CRUSA approved WMP Products Part #1010 (Metric/Monte Carlo right side); #1011 (Metric/Monte Carlo left side); and #1210 (Camaro/Chevelle right side) and #1211 (Camaro/Chevelle left side) Call (601)527-0084 to order.
  3. Any stock passenger car spindles.
  4. One spring allowed on each corner. Must be a minimum of 5”.
  5. Tubular upper A-frames allowed. Upper A-frame mounts may be relocated.
  6. No bump stops of any type allowed.
  7. No chains/limiters of any type allowed.
  8. Stock type steering box. No rack and pinion. Steering quickener ok. Stock center link.
  9. Tie rods may be tubular and made with heim joints.
  10. Steel brake rotors and calipers only. No aluminum suspension parts allowed.
REAR SUSPENSION
  1. . No spring rubbers. No progressive springs.
  2. Quick change rear ends allowed. Magnetic steel axle tubes, hubs, rotors, and drive flanges only. No gun drilled axles.
  3. Steel brake rotors and calipers only. NO brake floaters.
  4. All rear suspension mounts and/or brackets must be welded or bolted solid. e. One spring allowed on each corner. All springs must be a minimum of 5”.
  5. All rear springs must be mounted centerline of rear end housing.
  6. No sliders. h. Three(3) link suspension setups must adhere to the following requirements:
A. Lower control arms must be a maximum length of 24” and minimum of 15”.
B. Upper control arm should be constructed of solid material with no bushings or springs located at the top center of the rear end housing and remain centered over the rear end housing and top of the drive shaft(1” tolerance). No movable brackets.
C. One panhard bar, minimum 23” length, may be mounted behind the rear end housing.
D. J-bar may be used, minimum 19 ½” length. Must be mounted from left side of chassis to the right side of the drive shaft.
E. Rear springs must be mounted on top of axle tube. Center of spring must be center of axle tube. Zero tolerance!
  1. Stock OEM suspension setups must adhere to the following requirements:
A. Lower control arms must remain in stock location on chassis.
B. Lower control arms must be mounted no lower than 2 ¾” from bottom of axle tube.
C. Upper control arms must remain in stock location on chassis.
D. Upper control arm mounts 7 ¾” from center of axle tube to center of mounting bolts.
E. Rear springs must be mounted on top of axle tube. Center of spring must be center of axle tube. Zero tolerance!
  1. Leaf spring suspension – any leaf spring allowed. No coil springs allowed.
  2. No bump stops of any type allowed.
  3. Solid limiting chain allowed on left rear suspension only.
SHOCKS
  1. Steel bodied, symmetric (same size/diameter), non-adjustable shocks only. No Schrader valve shocks. No piercing valves. Shock valving or gas pressure may not be adjustable at the racetrack. No shock covers. No air shocks. No remote reservoir shocks.
  2. Front shocks must extend 7” minimum and must be fully collapsible. Rear shocks must extend 9” and must be fully collapsible.
  3. Shock Claim:
A. $200 per shock.
B. Car claiming shock(s) must finish in the top 5 and on the lead lap. Claims must be made to Tech Official within 5 minutes after the checkered flag falls on the feature event.
C. No reverse shock claims (cannot claim shocks from car finishing behind you)
D. Refusal to allow shocks to be claimed or confiscated by officials will result in driver losing all points and money for that event, and face the following punishment:
a. First Offense – 2-week suspension and $250 fine.
b. Second Offense – 30-day suspension and $500 fine.
c. Third Offense – 365-day suspension and $1,000 fine.
  • Series or track officials may confiscate or claim shocks at any time. If confiscated and shocks are determined to be legal, they will be returned to driver and points and money will be awarded as earned. If shocks are determined to be illegal, driver will lose all points and money from the event and face the following punishment:
a. First Offense – 2-week suspension and $250 fine.
b. Second Offense – 30-day suspension and $500 fine.
c. Third Offense – 365-day suspension and $1,000 fine.
WHEELS
  1. 8” maximum steel wheels. Beadlocks allowed. Stock type lug pattern only.
  2. No wide 5 wheels or adapters.
  3. Wheel covers must be securely fastened. Recommend that wheel covers have a minimum of 5 mounting points. Wheel covers having only 3 attachment points must be bolted on at all 3 points using a minimum 1/4” or 5/16” magnetic steel hex head bolt and fastening (nut assembly) system. Cars that lose a wheel cover may be subject to disqualification.
TIRES
  1. Hoosier H500 and American Racer Tires 500 Torc. Grooving or siping are allowed. Grinding/buffing is permitted. NO drilling.
  2. Tires must remain in factory manufactured condition. Any alteration from factory manufactured condition is prohibited. All decisions are final.
  3. No chemically altering of tires.
  4. Tires must punch 55 at ambient temperature (cold). The series’ durometer is the official durometer and testing method of punch number rule. Any tire failing to punch properly will be subject to further test methods and disqualification. Tire(s) in question may be confiscated and tested by any means deemed necessary by track or series’ officials. All decisions are final.
  5. Drivers finishing in the top 5 may protest the tire of car or cars finishing ahead of them. Protest fee is $150. Driver filing protest must have money with them and notify track or series official within 5 minutes of the checkered flag in that event. Tire samples will be taken and sent to an independent lab chosen by the series for testing. All official’s decisions and lab results are final and official.
PENALTITIES FOR ILLEGAL TIRES:
a. First Offense - $500 fine and 30-day suspension from any CRUSA sanctioned event
b. Second Offense - $1,000 fine and 90-day suspension from any CRUSA sanctioned event
c. Third Offense - $2,000 fine and 365-day suspension from any CRUSA sanctioned event
d. Failure to allow any tire(s) to be confiscated will result in an additional $500 per tire fine added to any other fines and penalties. All decisions are final.
ALL OPEN WHEEL MODIFIED TEAMS ARE HELD ACCOUNTABLE FOR THEIR CONDUCT ON AND OFF THE TRACK. THE FANS AND SPONSORS PAY US, AND HELP US MAINTAIN THE VERY FUNDS YOU ARE RACING FOR. ANY MISCONDUCT THAT REPRESENTS BUCKSHOT SPEEDWAY VERY POORLY WILL RESULT IN POSSIBLE FINES, AND/OR EXPULSION FROM EVER RETURNING.
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Engine #1
Carburetor
Engie #2
Fuel
Engin Protest
Weight
Exhaust
Electronics
Body
Safety
Suspension
Shocks
Tires
Transmission
Deminsions
Parallel Lines
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