Pro Street Stock
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CHASSIS
A. Any 1968 or newer, stock passenger street type car. No commercial vehicles, convertibles, sports-cars, or station wagons allowed. Minimum stock wheel base 108" except strut cars which may be 101”.
WEIGHT
Minimum weight, including driver, after race is 2,800 pounds. Cars utilizing a 3 link must weigh 3000 pounds. Cars with aluminum heads must add 50 pounds in front of mid plate. Any added weight must be securely bolted with a minimum of ½ inch bolts.
FRAME
a. American made OEM front frame clips mandatory
b. No after market front frame clips.
c. Clips cannot be cut forward of lower A-frames and if rear steer they cannot be cut forward of steering box or idler arms.
d. No pick-ups or foreign car or truck clips allowed. This mean no Nissan, Toyota’s etc.
e. Chevrolet motors must be in Chevrolet frames.
f. Ford and Mopar may use Chevy, Ford, or Mopar frames.
g. Full frame cars must match front to rear. See enclosed chart for measurments.
FRONT SUSPENSION
All components and mounts must be steel, unaltered OEM, in OEM location and match frame. Rubber, nylon, or steel lower A-frame bushings only. No offsets or bearing type allowed. No sway bars. Exceptions are: weight jacks allowed. Must be in centerline of spring tower. OEM upper A- frame mounts may be moved or replaced with aftermarket steel non- adjustable mount matching upper A frame bolt on design. OEM or OEM replacement design ball joints allowed. Upper A frame may be aftermarket but must be non- adjustable. IMCA approved type recommended. Shock location may be moved. Frame may not be altered in any way. Single hole shock mounts only. Tie rod adjusting sleeve may be replaced with swedge tube. No suspension adjustments inside of drivers compartment. Spindles must be steel. No aluminum.
STEERING
All steering must use stock sector boxes in stock location. Rack and pinion cars must use stock components in stock location.
SHOCKS
One steel non adjustable unaltered shock per wheel No coil over, air or remote reservoir shocks. No Schrader or bladder type valves allowed. No coil over eliminators.
SPRINGS
One steel spring per wheel only. All coil springs must be 4.5 inches minimum diameter, non- progressive, except strut Camaros and Firebirds which must use stock size struts in stock location.
REAR SUSPENSION
Option 1: All components and mounts must be steel, unaltered OEM in OEM location and match frame. No independent rear suspensions. OEM rubber or nylon control arm bushings only. No offset or bearing type. Welded single hole shock mounts only. Exceptions are coil springs may be moved, but center line of axle tube can be no further forward than the front of spring, or no further back than rear of spring. Shocks may be moved but must remain behind housing. Rear end lower control arm mounts maximum 7.5 inches long. May have maximum 5 holes for adjustment. Upper control arm mounts on rear end must be level with each other. May use stock replacement length Speedway upper and lower control arms
OPTION 2: Same basic rules as above but may run a 3-link with stock length bottom control arms in stock location. Upper link must be solid with no cushion of any kind, and may not extend beyond the rear of the drivers sear.
OPTION 3: Strut cars. Must have all struts in stock locations.
NO MIXING OF OPTIONS.
BODY
Gutting allowed. All body chrome, glass, plastic, and interior must be removed. All doors and trunks must be welded or bolted. Body must be neat and have acceptable Front Firewall. Rear Firewall may be stock, with all openings sealed or may he metal of minimum 20 gauge thickness. In case, the top, bottom, and both sides must he fully sealed and with no openings. Fuel Cells may protrude through bottom of trunk, and must have adequate protection (drop hoop, Etc..), and must be in steel case. The front windshield area must be covered with approved driver Protection screen. Stock appearing rubber or plastic nose pieces are recommended. The car must be brightly painted in colors that contrast with the car number. Numbers must be at least 18” in height and 3” in width on both doors, top and rear of car. Aftermarket bodies will be allowed, but I prefer them to look factory. Aftermarket spoilers may be no taller than 8 inches with sideboards tapering to 1 inch no more than 12 inches to the front.
ENGINE
Any automotive engine originally produced by an American manufacturer for passenger car use not to exceed 8 cylinders and not to exceed one intake and one exhaust valve per cylinder. Make optional, but must be same manufacturer as frame and body and must remain in stock location. Stock number of cylinders for make and model of car. No bowtie blocks.
A. Maximum displacement, to include wear and clearance, is: GM—362” total, Ford—362” total, Chrysler-368” total, all others must not exceed 362" total.
B. Heads: Any cast iron head that is sold retail for $800 or less. No modifications to any head other than straight milling.
C. No porting and polishing, or heads or blocks permitted. Port matching allowed intake to heads on intake side only. Bowls may not exceed an 80 degree angle. Heads may be surfaced. Valve angles, Ford 20degrees; Chevy, 23 degrees; Mopar, 18 degrees. Stock Stroke only. Stroke length must be + or - .014 of an inch of stock. No sleeved back engines permitted, flat top pistons only. Valve sizes may not exceed 1.60 ex, 2.08 intake. Chrysler and Ford stock valve size for head used.
D. No roller cams, mushroom or roller lifters, or overhead cams allowed.
E. One four barrel carburetor.
F. Intake Manifold optional.
G. Battery type ignition only, no magnetos. MSD may be used but swap rule with track is in effect. No digital ignition boxes of any kind. Boxes may not be accessible from drivers compartment. No wires from drivers compartment to ignition box. One box to car only.
H. The use of injection, super or turbo chargers, nitrous oxide, or water injection will not be allowed.
I. No injector type pumps. Electric fuel pumps are not allowed. Any steel rod no longer than 6 inches.
J. No dry sump or external oil pumps allowed.
K. Engine must be in stock location + or - 1” from upper ball joint center line.
L. No Predators allowed. Maximum 1” adapter plate under carburetor
OKC ALUMINUM SPECHEAD RULE
a. All spec heads will be applied with CNC bowl blend and make matching
b. No grinding or blending of CNC work is allowed.
c. No grinding or polishing of any kind is allowed anywhere on the castings.
d. No use of any substance that may change or alter the shape or size of ports or combustion chambers is allowed.
e. Valve seats and guides are to remain as manufactured and in their cast position, valve must stay on valve seat and cannot touch aluminum.
f. Valve angles are to remain as manufactured. The original seat center locations as provided by the head manufacturer may not be altered.
g. No tapering or reshaping of value guides will be allowed.
h. No minimum combustion chamber volume.
i. Spec cylinder head serial numbers must remain on the head and may not be defaced or altered.
j. No welding modifications are allowed to the original castings. Brodix will provide a repair service where we register and keep track of repairs if you desire. (Chevrolet part number SP CH OKC) (Mopar part number SP MO OKC) (Ford part number SP FD OKC) IMCA stamped head OK.
k. Valve stems may be no smaller than 11/32.
l. Fuel: and power steering pumps. Type optional. Must be run off front of motor, except oil pump.
m. Cars running aluminum heads must carry 25 pounds extra in front of mid plate.
Cars racing regularly at Brill Motor Speedway are legal to race at OSP.
SAFETY
ALL CARS SUBJECT TO INSPECTION AT ANY TIME.
A. Mandatory: 3” wide safety belt and shoulder harness with two belts over shoulder and of the quick release type. All belts must be securely fastened to the frame or roll cage. Belts must come from behind the driver.
B. Mandatory: Shock resistant roll bar padding.
C. Mandatory: Two throttle return springs, steel toe loop on throttle pedal is required.
D. Mandatory: All cars must have a fire extinguisher securely mounted within the reach of the driver for emergency use. No extinguisher may be taped to the mounting bracket or roll bar cage.
E. Mandatory: All drivers must wear driving suits made of a fire resistant material, and the suit should effectively cover the drivers body.
F. Mandatory: Seats that have been approved for marketing as racing seats may be used if properly secured to body chassis and roll cage with aircraft bolts a minimum of 3/8” diameter.
G. Mandatory: Racing helmets meeting specifications set forth in TITLE 49, CODE OF
REGULATIONS, Part 571, Federal Motor Vehicle Safety Standard Number 571.218, or meeting the specifications set forth by the American National Standards Institute Inc. In ANSI 290.1-1971, ANS 290.1-1973, and ANSI 290.1-1979 required and must be worn at all times car is on track. Helmets must accompany car at time of inspection.
BRAKES
All cars must have minimum of four wheel brakes in working order. Brake balancing allowed. (Note rear calipers and rotors need not match).
WHEELS
Steel wheels only. Maximum 10” wide. One valve stem per wheel. No bleed off valves permitted, All wheels must have a minimum of five 1” lug nuts. Reinforcing of wheels is permitted. No dual, magnesium, or aluminum wheel allowed. All wheels must have double center plates or have 1/4” thick steel centers. Wide 5 pattern is okay. Cars may run bead locks on right side of car only.
TIRES
NASCAR pull-offs only!! Must durometer 60 or better. May use a KK-704 stamped or unstamped mounted on an 8 inch wheel.
MUFFLERS
Headers may be used. With headers, 16” Lobak mufflers or comparable brand are required. Only 2 mufflers per car allowed. No muffler modifications are allowed, NO zoomies. No leaks in exhaust on front side of mufflers. Cross over type headers may not be exposed in drivers compartment. Must exit through floorboard. Holes through body must be neat and sliced to header tubes.
ROLL CAGES
Steel roll cage mandatory. Front and rear bars must be connected at top (cage type). At least three side door bars front and rear roll bars is required. Minimum 1‘1/2” O.D. will require minimum of.120” wall tubing. Rear hoop must be welded to floor no more than 4” past door crack.
REAR-END
Any passenger car or pickup production rear end may be locked by: welding spider gears, mini spool, or by whatever mean. Stock Ford 9” may be used. Floaters acceptable. No limited slip, Detroit lockers, except ones that are locked solid with a spool locking device.
TRANSMISSION
OEM Standard or Automatic
A. Type optional. Bert or Brenn type of transmissions are okay.
B. Car must have self starter. neutral, and reverse gear in operating order.
C. Car must be able to leave pits and starting line under it’s own power.
D. From a neutral position, with engine running, car must be able to go forward and backward.
E. Drive shafts must be painted white.
F. Safety loops are mandatory.
G. Lakewood type scatter shield bell housing is required when needed.
BUMPERS
A. Bumpers need to look as close to stock as possible. No railroad type of bumpers. Uprights to protect the radiator may be constructed inside grill shell.
B. Nerf bars optional, but if used must be within 1” of body. Bumpers and nerf bars must have rounded ends with no sharp edges.
FUEL TANK
A fuel cell is mandatory. Fuel cell must be fully enclosed in a metal box of .20 gauge thickness minimum. In either case, the fuel container must be securely fastened to the trunk floor and frame with metal straps and bolts. Drain holes of 1/8” should be drilled in the metal box and trunk floor to release any fuel spillage that may occur.
FUEL
Race fuel or Methanol. No Additives
RADIATOR
Only one radiator and it must he centered in front of engine in vertical position. No auxiliary cooling tanks allowed. Metal Shrouds are Mandatory!
BATTERY
Must be securely mounted and covered with sheet rubber. Battery must be in good working condition and capable of starting car.
MISCELLANEOUS
A. Rearview mirrors are not allowed. No radio transceiver communications systems allowed,
B. Rupture of a gas tank or loss of fuel requires leaving the race track immediately.. Any loss of wheels, flat tires, dislodged hoods or body parts requires leaving the race track immediately.
ALL DRIVERS MUST HAVE WORKING RACEIVER BEFORE ENTERING TRACK. NO EXCEPTIONS!!!!!
A. Any 1968 or newer, stock passenger street type car. No commercial vehicles, convertibles, sports-cars, or station wagons allowed. Minimum stock wheel base 108" except strut cars which may be 101”.
WEIGHT
Minimum weight, including driver, after race is 2,800 pounds. Cars utilizing a 3 link must weigh 3000 pounds. Cars with aluminum heads must add 50 pounds in front of mid plate. Any added weight must be securely bolted with a minimum of ½ inch bolts.
FRAME
a. American made OEM front frame clips mandatory
b. No after market front frame clips.
c. Clips cannot be cut forward of lower A-frames and if rear steer they cannot be cut forward of steering box or idler arms.
d. No pick-ups or foreign car or truck clips allowed. This mean no Nissan, Toyota’s etc.
e. Chevrolet motors must be in Chevrolet frames.
f. Ford and Mopar may use Chevy, Ford, or Mopar frames.
g. Full frame cars must match front to rear. See enclosed chart for measurments.
FRONT SUSPENSION
All components and mounts must be steel, unaltered OEM, in OEM location and match frame. Rubber, nylon, or steel lower A-frame bushings only. No offsets or bearing type allowed. No sway bars. Exceptions are: weight jacks allowed. Must be in centerline of spring tower. OEM upper A- frame mounts may be moved or replaced with aftermarket steel non- adjustable mount matching upper A frame bolt on design. OEM or OEM replacement design ball joints allowed. Upper A frame may be aftermarket but must be non- adjustable. IMCA approved type recommended. Shock location may be moved. Frame may not be altered in any way. Single hole shock mounts only. Tie rod adjusting sleeve may be replaced with swedge tube. No suspension adjustments inside of drivers compartment. Spindles must be steel. No aluminum.
STEERING
All steering must use stock sector boxes in stock location. Rack and pinion cars must use stock components in stock location.
SHOCKS
One steel non adjustable unaltered shock per wheel No coil over, air or remote reservoir shocks. No Schrader or bladder type valves allowed. No coil over eliminators.
SPRINGS
One steel spring per wheel only. All coil springs must be 4.5 inches minimum diameter, non- progressive, except strut Camaros and Firebirds which must use stock size struts in stock location.
REAR SUSPENSION
Option 1: All components and mounts must be steel, unaltered OEM in OEM location and match frame. No independent rear suspensions. OEM rubber or nylon control arm bushings only. No offset or bearing type. Welded single hole shock mounts only. Exceptions are coil springs may be moved, but center line of axle tube can be no further forward than the front of spring, or no further back than rear of spring. Shocks may be moved but must remain behind housing. Rear end lower control arm mounts maximum 7.5 inches long. May have maximum 5 holes for adjustment. Upper control arm mounts on rear end must be level with each other. May use stock replacement length Speedway upper and lower control arms
OPTION 2: Same basic rules as above but may run a 3-link with stock length bottom control arms in stock location. Upper link must be solid with no cushion of any kind, and may not extend beyond the rear of the drivers sear.
OPTION 3: Strut cars. Must have all struts in stock locations.
NO MIXING OF OPTIONS.
BODY
Gutting allowed. All body chrome, glass, plastic, and interior must be removed. All doors and trunks must be welded or bolted. Body must be neat and have acceptable Front Firewall. Rear Firewall may be stock, with all openings sealed or may he metal of minimum 20 gauge thickness. In case, the top, bottom, and both sides must he fully sealed and with no openings. Fuel Cells may protrude through bottom of trunk, and must have adequate protection (drop hoop, Etc..), and must be in steel case. The front windshield area must be covered with approved driver Protection screen. Stock appearing rubber or plastic nose pieces are recommended. The car must be brightly painted in colors that contrast with the car number. Numbers must be at least 18” in height and 3” in width on both doors, top and rear of car. Aftermarket bodies will be allowed, but I prefer them to look factory. Aftermarket spoilers may be no taller than 8 inches with sideboards tapering to 1 inch no more than 12 inches to the front.
ENGINE
Any automotive engine originally produced by an American manufacturer for passenger car use not to exceed 8 cylinders and not to exceed one intake and one exhaust valve per cylinder. Make optional, but must be same manufacturer as frame and body and must remain in stock location. Stock number of cylinders for make and model of car. No bowtie blocks.
A. Maximum displacement, to include wear and clearance, is: GM—362” total, Ford—362” total, Chrysler-368” total, all others must not exceed 362" total.
B. Heads: Any cast iron head that is sold retail for $800 or less. No modifications to any head other than straight milling.
C. No porting and polishing, or heads or blocks permitted. Port matching allowed intake to heads on intake side only. Bowls may not exceed an 80 degree angle. Heads may be surfaced. Valve angles, Ford 20degrees; Chevy, 23 degrees; Mopar, 18 degrees. Stock Stroke only. Stroke length must be + or - .014 of an inch of stock. No sleeved back engines permitted, flat top pistons only. Valve sizes may not exceed 1.60 ex, 2.08 intake. Chrysler and Ford stock valve size for head used.
D. No roller cams, mushroom or roller lifters, or overhead cams allowed.
E. One four barrel carburetor.
F. Intake Manifold optional.
G. Battery type ignition only, no magnetos. MSD may be used but swap rule with track is in effect. No digital ignition boxes of any kind. Boxes may not be accessible from drivers compartment. No wires from drivers compartment to ignition box. One box to car only.
H. The use of injection, super or turbo chargers, nitrous oxide, or water injection will not be allowed.
I. No injector type pumps. Electric fuel pumps are not allowed. Any steel rod no longer than 6 inches.
J. No dry sump or external oil pumps allowed.
K. Engine must be in stock location + or - 1” from upper ball joint center line.
L. No Predators allowed. Maximum 1” adapter plate under carburetor
OKC ALUMINUM SPECHEAD RULE
a. All spec heads will be applied with CNC bowl blend and make matching
b. No grinding or blending of CNC work is allowed.
c. No grinding or polishing of any kind is allowed anywhere on the castings.
d. No use of any substance that may change or alter the shape or size of ports or combustion chambers is allowed.
e. Valve seats and guides are to remain as manufactured and in their cast position, valve must stay on valve seat and cannot touch aluminum.
f. Valve angles are to remain as manufactured. The original seat center locations as provided by the head manufacturer may not be altered.
g. No tapering or reshaping of value guides will be allowed.
h. No minimum combustion chamber volume.
i. Spec cylinder head serial numbers must remain on the head and may not be defaced or altered.
j. No welding modifications are allowed to the original castings. Brodix will provide a repair service where we register and keep track of repairs if you desire. (Chevrolet part number SP CH OKC) (Mopar part number SP MO OKC) (Ford part number SP FD OKC) IMCA stamped head OK.
k. Valve stems may be no smaller than 11/32.
l. Fuel: and power steering pumps. Type optional. Must be run off front of motor, except oil pump.
m. Cars running aluminum heads must carry 25 pounds extra in front of mid plate.
Cars racing regularly at Brill Motor Speedway are legal to race at OSP.
SAFETY
ALL CARS SUBJECT TO INSPECTION AT ANY TIME.
A. Mandatory: 3” wide safety belt and shoulder harness with two belts over shoulder and of the quick release type. All belts must be securely fastened to the frame or roll cage. Belts must come from behind the driver.
B. Mandatory: Shock resistant roll bar padding.
C. Mandatory: Two throttle return springs, steel toe loop on throttle pedal is required.
D. Mandatory: All cars must have a fire extinguisher securely mounted within the reach of the driver for emergency use. No extinguisher may be taped to the mounting bracket or roll bar cage.
E. Mandatory: All drivers must wear driving suits made of a fire resistant material, and the suit should effectively cover the drivers body.
F. Mandatory: Seats that have been approved for marketing as racing seats may be used if properly secured to body chassis and roll cage with aircraft bolts a minimum of 3/8” diameter.
G. Mandatory: Racing helmets meeting specifications set forth in TITLE 49, CODE OF
REGULATIONS, Part 571, Federal Motor Vehicle Safety Standard Number 571.218, or meeting the specifications set forth by the American National Standards Institute Inc. In ANSI 290.1-1971, ANS 290.1-1973, and ANSI 290.1-1979 required and must be worn at all times car is on track. Helmets must accompany car at time of inspection.
BRAKES
All cars must have minimum of four wheel brakes in working order. Brake balancing allowed. (Note rear calipers and rotors need not match).
WHEELS
Steel wheels only. Maximum 10” wide. One valve stem per wheel. No bleed off valves permitted, All wheels must have a minimum of five 1” lug nuts. Reinforcing of wheels is permitted. No dual, magnesium, or aluminum wheel allowed. All wheels must have double center plates or have 1/4” thick steel centers. Wide 5 pattern is okay. Cars may run bead locks on right side of car only.
TIRES
NASCAR pull-offs only!! Must durometer 60 or better. May use a KK-704 stamped or unstamped mounted on an 8 inch wheel.
MUFFLERS
Headers may be used. With headers, 16” Lobak mufflers or comparable brand are required. Only 2 mufflers per car allowed. No muffler modifications are allowed, NO zoomies. No leaks in exhaust on front side of mufflers. Cross over type headers may not be exposed in drivers compartment. Must exit through floorboard. Holes through body must be neat and sliced to header tubes.
ROLL CAGES
Steel roll cage mandatory. Front and rear bars must be connected at top (cage type). At least three side door bars front and rear roll bars is required. Minimum 1‘1/2” O.D. will require minimum of.120” wall tubing. Rear hoop must be welded to floor no more than 4” past door crack.
REAR-END
Any passenger car or pickup production rear end may be locked by: welding spider gears, mini spool, or by whatever mean. Stock Ford 9” may be used. Floaters acceptable. No limited slip, Detroit lockers, except ones that are locked solid with a spool locking device.
TRANSMISSION
OEM Standard or Automatic
A. Type optional. Bert or Brenn type of transmissions are okay.
B. Car must have self starter. neutral, and reverse gear in operating order.
C. Car must be able to leave pits and starting line under it’s own power.
D. From a neutral position, with engine running, car must be able to go forward and backward.
E. Drive shafts must be painted white.
F. Safety loops are mandatory.
G. Lakewood type scatter shield bell housing is required when needed.
BUMPERS
A. Bumpers need to look as close to stock as possible. No railroad type of bumpers. Uprights to protect the radiator may be constructed inside grill shell.
B. Nerf bars optional, but if used must be within 1” of body. Bumpers and nerf bars must have rounded ends with no sharp edges.
FUEL TANK
A fuel cell is mandatory. Fuel cell must be fully enclosed in a metal box of .20 gauge thickness minimum. In either case, the fuel container must be securely fastened to the trunk floor and frame with metal straps and bolts. Drain holes of 1/8” should be drilled in the metal box and trunk floor to release any fuel spillage that may occur.
FUEL
Race fuel or Methanol. No Additives
RADIATOR
Only one radiator and it must he centered in front of engine in vertical position. No auxiliary cooling tanks allowed. Metal Shrouds are Mandatory!
BATTERY
Must be securely mounted and covered with sheet rubber. Battery must be in good working condition and capable of starting car.
MISCELLANEOUS
A. Rearview mirrors are not allowed. No radio transceiver communications systems allowed,
B. Rupture of a gas tank or loss of fuel requires leaving the race track immediately.. Any loss of wheels, flat tires, dislodged hoods or body parts requires leaving the race track immediately.
ALL DRIVERS MUST HAVE WORKING RACEIVER BEFORE ENTERING TRACK. NO EXCEPTIONS!!!!!
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