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BODY:
The car must retain its original appearance, profiles, and dimensions. Factory roof and quarter panels must be used. Aftermarket fiberglass and/or carbon fiber replacement panels are limited to hood, front fenders, doors, deck-lids, and bumpers only. All front ends must be of factory dimensions and cannot be stretched. Aftermarket wings and spoilers are permitted. Complete stock appearing front and rear bumpers are required. A hood must be used: scoop or hood must cover the entire induction system. Forward facing hood scoops/ turbo or supercharger inlets are permitted. Hood scoop may not be taller than 9 inches measured from the bottom of the windshield. Beam trippers, extenders are prohibited.
INTERIOR:
Factory appearing dashboard, door panels, and driver seat is required. Full Carpet is required on floorboards including transmission tunnel. Factory floor pan on driver and passenger side required. Transmission tunnel maybe removable and must be metal. Bare inside frame of car cannot be exposed. Aftermarket steering column is permitted.
WINDSHIELD/WINDOWS:
OEM glass or lexan windows are permitted.
CHASSIS:
Complete stock chassis and frame rails must be retained from motor plate/shock tower to behind the rear wheel opening. Back-halved cars are not permitted. Front core support may be modified or removed. Aftermarket bolt-on replacement front K-members/sub frames are allowed (if front shocks bolt to K-member then they must be in factory location). Mini tubs are allowed. Rear frame rails may be notched for clearance and must be in the factory location. Factory wheelbase must be maintained. (+ or – 1 inch)
ENGINE:
Maximum displacement for all engines is 600ci. Small blocks are allowed any deck height but must retain stock bore spacing. Big block allowed the following deck heights but must retain stock bore spacing. GM Big Blocks are limited to a 10.2 deck height. Ford Big Blocks are limited to a 10.3 deck height. Mopar Big Blocks are limited to a 10.7 deck height
TURBOCHARGERS:
Single turbocharger limited to 80 mm or old style 98/88 mm maximum. Turbochargers w/nitrous-oxide prohibited.
SUPERCHARGERS:
Cog or gear driven superchargers are permitted, must meet all factory inlet, outlet, and internal housing dimensions.
NITROUS OXIDE:
Small blocks and Big blocks are limited to a single-stage fogger or plate system. A single stage fogger (2 nitrous solenoids and 2 fuel solenoids) are permitted. Conventional Style plate then you are limited to (1 fuel solenoid, 1 nitrous solenoid), and 1 purge solenoid, purge must exit engine compartment. Single bar plate limited to a .120 jet and Cross Bar plate is limited to two .82 jets. All nitrous systems are limited to a -6 line. All fogger combinations are limited to a .40 jet. No Raised Runner Heads allowed. A Raised Runner Head is defined as a head where the port is more than .550 from deck. Floor is actual surface of continuous flow. Big blocks are allowed a single bottle. EFI is not allowed on NOS combinations.
TRANSMISSION:
Any factory style automatic transmission allowed. OEM factory style manual transmission allowed. Bruno-Lenco transmissions are prohibited. Aftermarket clutch less manual transmission and clutch assisted manual transmissions are permitted on naturally aspirated combinations only. Electric shifters or air shifters are permitted.
INDUCTION:
All cars are limited to a dedicated single opening cast intake and a single carb or a single 4150 or 4500 series throttle body. (4 blade, dual blade or single blade throttle body permitted).Throttle body must bolt directly to intake manifold (No Adapters) in stock bolt location on 4150/4500 flange. EFI not allowed on NOS combinations.
OILING SYSTEM:
Dry sump oiling systems are permitted on all cars.
EXHAUST:
Mufflers or inserts are required on all cars except for turbo cars. Exhaust may exit underneath car or out the front fenders but must not affect timing or staging beams.
FUEL:
Gasoline only is permitted. Alcohol/E85 permitted on roots blown/V6/Inline-6/4cyl applications. Alcohol or E-85 or other derivatives is prohibited on all other combinations. Water or meth injection prohibited.
STREET EQUIPMENT:
Functional headlights, taillights and brake lights required. All headlights, brake lights, etc. must be on car and not removed for any reason. All vehicles may be towed back from their passes.
SUSPENSION:
Stock style, ladder bar and four link suspension are permitted on all cars. Aftermarket direct replacement components such as: front control arms, rear control arms, front coil over shocks, and rear coil over shocks are permitted. Aftermarket rack and pinion steering allowed. Rear leaf springs, springs, shocks, and coil-overs may be moved to accommodate tire clearance, and do not need to be mounted in stock location. Bolt-on or welded sub-frame connectors, rear sway bars, are permitted on all cars. Wheelie bars are prohibited on all cars. Torque arms are only permitted on cars that were originally equipped from factory with it. Upper and Lower control arms must be mounted in the factory chassis locations -S Box permitted.
Aftermarket rear suspension COPO Chevy and Drag Pack permitted on the new Camaro and Challengers or torque arm on late model GTO
TIRES:
All cars must compete on a Drag Radial type tire with the following sidewall designation 275/60/15 or a 28.0” x 10.5” slick, no “W” tires permitted.
BASE WEIGHTS:
1978 and earlier vehicles: deduct 50 lbs.
All minimum weights include the driver
All small block weights are based on a standard deck height.
Naturally Aspirated (small block) 2500 lbs.
Naturally Aspirated (big block) 2700 lbs.
NITROUS WEIGHTS:
Buick/Olds/Pontiac Nitrous combos will be 3150 lbs. and not to exceed 588 cu inches
Nitrous (small block) 2850 lbs.
Nitrous SB2 head combinations 2850 lbs.
Nitrous (big block single stage fogger standard/tall deck height and conventional heads) 3250 lbs.
* Add 100 lbs. for a small block tall deck(9.325 in.) [NOS only].
* Small Blocks (NOS & N/A) with 23 degree Chevy heads, 20 degree Ford heads, and 18 degree Mopar heads: deduct 100 lbs.
* Small Block 23 degree raised runner head deduct 50 lbs from base weight.
* Small Block (NOS only) 18-10 degree valve angle inline head: deduct 50 lbs
* Small block is 465ci or smaller.
* Buick/Olds/Pontiac Nitrous combos will be 3150 lbs. and not to exceed 588 cu inches.
SUPERCHARGER WEIGHTS:
F1A – 3000 lbs.
F1C – 3050 lbs.
YSI – 3050 lbs.
* Belt driven centrifugal superchargers: deduct 50 lbs.
TURBO WEIGHTS:
T-76 mm – 3000 lbs.
T-80 mm – 3050 lbs.
98/88 mm – 3300 lbs.
GT47 – 3200 lbs.
No Billet wheels on any turbo combinations, except for 76 mm (add 50 lbs for 76 with Billet wheel). No Reducers on turbo or supercharged combinations. 76mm & 80mm turbochargers (mid frame only) and superchargers must be as manufactured from factory (GT55-80 or equivalent with cast wheel add 50 lbs). Sheet metal or heavily modified cast intake add 50 lbs.
* Non-Intercooled boosted cars on gasoline: deduct 50 lbs.
Big Block Chevy Cylinder Head:
Conventional Heads as referenced to the original Mark IV design. (BBC symmetrical or raised port design is not defined as conventional for these rules)
* Stock port location/Standard port location – no raised runner
* Floor of port may not be more than .550 from deck
* No port plates or intake manifold adapter plates permitted
* No epoxy or welding permitted except for repair in chambers or between cylinders
* No welding of tops of runners except for adding bolt bosses for rocker stands
* Intake valve angle will measure 24* + or – 1*
* Maximum dimension allowable from deck surface to the top of the intake port will be no more than 3.125”
* Heads with “AS CAST” intake port lower than this dimension will be permitted.
* No welding or epoxy permitted to achieve this dimension.
* Tech official has final say at the time of inspection on any issues that may arise
Suggested castings to include the following:
* Billet heads not allowed
CFE/BMF 350 – 405cc Big Block Chevrolet
Chevrolet Factory OEM Iron & Aluminum; OEM Aluminum
Brodix BB-1, BB-1 OEF1, BB-2, BB-2X, BB-2 Extra, BB-2 Plus, BB-3, BB-3X, SR23 (non-raised runner Head Hunter)
Edelbrock Victor & Victor CNC, Edelbrock Victor Jr. CNC Oval & Rect
Edelbrock Performer RPM 454-O, 454-O, 454-R
Edelbrock Victor 24-degree Rectangular Port #77419, #77409
Edelbrock RPM XT Rectangle PN#51539
Edelbrock RPM XT Oval PN#51459
Edelbrock Victor PN#61409
Edelbrock Victor PN#61419
Edelbrock Victor PN#77609
Pro – Filer Sniper and SniperX 290 cc 320 cc and 375
Dart Pro 1 310 cc thru 355 cc, Race Series 265 cc thru 360 cc, Dart 380 Pro2
Canfield Big Block Chevy 24.5-800, 24.5-900
GMPP Signature Series BB Heads cast # 12363401, 12363391
Air Flow Research 265, 290, 305, 315, 335, 345, 357, 385, Oval, Rect & CNC Port
World Products Merlin II Oval & Rect. Port 269, 320, 345, 305, 350 Iron & Alum
(RHS) Pro Top Line Pro Thunder 320, 360 cc Alum & Iron
Big Block Ford Cylinder Head:
* Factory cast Iron heads (don’t’ think we’ll see many of them)
* A-429 Cobra Jet (Ford Motorsports)
* Cobra Jet (Blue Thunder, Trick Flow)
* Super Cobra Jet (Ford Motorsports, FRPP/Kaase)
* Blue Thunder “B” head
* Street Heat (Trick Flow)
* Edelbrock RPM
* P-51’s (Kaase)
* “A” designation heads (All manufacturers, Ford Motorsports, FRPP, Trick Flow, Eliminator, EX514, etc…)
Big Block Mopar
B-1 style cylinder heads only
The car must retain its original appearance, profiles, and dimensions. Factory roof and quarter panels must be used. Aftermarket fiberglass and/or carbon fiber replacement panels are limited to hood, front fenders, doors, deck-lids, and bumpers only. All front ends must be of factory dimensions and cannot be stretched. Aftermarket wings and spoilers are permitted. Complete stock appearing front and rear bumpers are required. A hood must be used: scoop or hood must cover the entire induction system. Forward facing hood scoops/ turbo or supercharger inlets are permitted. Hood scoop may not be taller than 9 inches measured from the bottom of the windshield. Beam trippers, extenders are prohibited.
INTERIOR:
Factory appearing dashboard, door panels, and driver seat is required. Full Carpet is required on floorboards including transmission tunnel. Factory floor pan on driver and passenger side required. Transmission tunnel maybe removable and must be metal. Bare inside frame of car cannot be exposed. Aftermarket steering column is permitted.
WINDSHIELD/WINDOWS:
OEM glass or lexan windows are permitted.
CHASSIS:
Complete stock chassis and frame rails must be retained from motor plate/shock tower to behind the rear wheel opening. Back-halved cars are not permitted. Front core support may be modified or removed. Aftermarket bolt-on replacement front K-members/sub frames are allowed (if front shocks bolt to K-member then they must be in factory location). Mini tubs are allowed. Rear frame rails may be notched for clearance and must be in the factory location. Factory wheelbase must be maintained. (+ or – 1 inch)
ENGINE:
Maximum displacement for all engines is 600ci. Small blocks are allowed any deck height but must retain stock bore spacing. Big block allowed the following deck heights but must retain stock bore spacing. GM Big Blocks are limited to a 10.2 deck height. Ford Big Blocks are limited to a 10.3 deck height. Mopar Big Blocks are limited to a 10.7 deck height
TURBOCHARGERS:
Single turbocharger limited to 80 mm or old style 98/88 mm maximum. Turbochargers w/nitrous-oxide prohibited.
SUPERCHARGERS:
Cog or gear driven superchargers are permitted, must meet all factory inlet, outlet, and internal housing dimensions.
NITROUS OXIDE:
Small blocks and Big blocks are limited to a single-stage fogger or plate system. A single stage fogger (2 nitrous solenoids and 2 fuel solenoids) are permitted. Conventional Style plate then you are limited to (1 fuel solenoid, 1 nitrous solenoid), and 1 purge solenoid, purge must exit engine compartment. Single bar plate limited to a .120 jet and Cross Bar plate is limited to two .82 jets. All nitrous systems are limited to a -6 line. All fogger combinations are limited to a .40 jet. No Raised Runner Heads allowed. A Raised Runner Head is defined as a head where the port is more than .550 from deck. Floor is actual surface of continuous flow. Big blocks are allowed a single bottle. EFI is not allowed on NOS combinations.
TRANSMISSION:
Any factory style automatic transmission allowed. OEM factory style manual transmission allowed. Bruno-Lenco transmissions are prohibited. Aftermarket clutch less manual transmission and clutch assisted manual transmissions are permitted on naturally aspirated combinations only. Electric shifters or air shifters are permitted.
INDUCTION:
All cars are limited to a dedicated single opening cast intake and a single carb or a single 4150 or 4500 series throttle body. (4 blade, dual blade or single blade throttle body permitted).Throttle body must bolt directly to intake manifold (No Adapters) in stock bolt location on 4150/4500 flange. EFI not allowed on NOS combinations.
OILING SYSTEM:
Dry sump oiling systems are permitted on all cars.
EXHAUST:
Mufflers or inserts are required on all cars except for turbo cars. Exhaust may exit underneath car or out the front fenders but must not affect timing or staging beams.
FUEL:
Gasoline only is permitted. Alcohol/E85 permitted on roots blown/V6/Inline-6/4cyl applications. Alcohol or E-85 or other derivatives is prohibited on all other combinations. Water or meth injection prohibited.
STREET EQUIPMENT:
Functional headlights, taillights and brake lights required. All headlights, brake lights, etc. must be on car and not removed for any reason. All vehicles may be towed back from their passes.
SUSPENSION:
Stock style, ladder bar and four link suspension are permitted on all cars. Aftermarket direct replacement components such as: front control arms, rear control arms, front coil over shocks, and rear coil over shocks are permitted. Aftermarket rack and pinion steering allowed. Rear leaf springs, springs, shocks, and coil-overs may be moved to accommodate tire clearance, and do not need to be mounted in stock location. Bolt-on or welded sub-frame connectors, rear sway bars, are permitted on all cars. Wheelie bars are prohibited on all cars. Torque arms are only permitted on cars that were originally equipped from factory with it. Upper and Lower control arms must be mounted in the factory chassis locations -S Box permitted.
Aftermarket rear suspension COPO Chevy and Drag Pack permitted on the new Camaro and Challengers or torque arm on late model GTO
TIRES:
All cars must compete on a Drag Radial type tire with the following sidewall designation 275/60/15 or a 28.0” x 10.5” slick, no “W” tires permitted.
BASE WEIGHTS:
1978 and earlier vehicles: deduct 50 lbs.
All minimum weights include the driver
All small block weights are based on a standard deck height.
Naturally Aspirated (small block) 2500 lbs.
Naturally Aspirated (big block) 2700 lbs.
NITROUS WEIGHTS:
Buick/Olds/Pontiac Nitrous combos will be 3150 lbs. and not to exceed 588 cu inches
Nitrous (small block) 2850 lbs.
Nitrous SB2 head combinations 2850 lbs.
Nitrous (big block single stage fogger standard/tall deck height and conventional heads) 3250 lbs.
* Add 100 lbs. for a small block tall deck(9.325 in.) [NOS only].
* Small Blocks (NOS & N/A) with 23 degree Chevy heads, 20 degree Ford heads, and 18 degree Mopar heads: deduct 100 lbs.
* Small Block 23 degree raised runner head deduct 50 lbs from base weight.
* Small Block (NOS only) 18-10 degree valve angle inline head: deduct 50 lbs
* Small block is 465ci or smaller.
* Buick/Olds/Pontiac Nitrous combos will be 3150 lbs. and not to exceed 588 cu inches.
SUPERCHARGER WEIGHTS:
F1A – 3000 lbs.
F1C – 3050 lbs.
YSI – 3050 lbs.
* Belt driven centrifugal superchargers: deduct 50 lbs.
TURBO WEIGHTS:
T-76 mm – 3000 lbs.
T-80 mm – 3050 lbs.
98/88 mm – 3300 lbs.
GT47 – 3200 lbs.
No Billet wheels on any turbo combinations, except for 76 mm (add 50 lbs for 76 with Billet wheel). No Reducers on turbo or supercharged combinations. 76mm & 80mm turbochargers (mid frame only) and superchargers must be as manufactured from factory (GT55-80 or equivalent with cast wheel add 50 lbs). Sheet metal or heavily modified cast intake add 50 lbs.
* Non-Intercooled boosted cars on gasoline: deduct 50 lbs.
Big Block Chevy Cylinder Head:
Conventional Heads as referenced to the original Mark IV design. (BBC symmetrical or raised port design is not defined as conventional for these rules)
* Stock port location/Standard port location – no raised runner
* Floor of port may not be more than .550 from deck
* No port plates or intake manifold adapter plates permitted
* No epoxy or welding permitted except for repair in chambers or between cylinders
* No welding of tops of runners except for adding bolt bosses for rocker stands
* Intake valve angle will measure 24* + or – 1*
* Maximum dimension allowable from deck surface to the top of the intake port will be no more than 3.125”
* Heads with “AS CAST” intake port lower than this dimension will be permitted.
* No welding or epoxy permitted to achieve this dimension.
* Tech official has final say at the time of inspection on any issues that may arise
Suggested castings to include the following:
* Billet heads not allowed
CFE/BMF 350 – 405cc Big Block Chevrolet
Chevrolet Factory OEM Iron & Aluminum; OEM Aluminum
Brodix BB-1, BB-1 OEF1, BB-2, BB-2X, BB-2 Extra, BB-2 Plus, BB-3, BB-3X, SR23 (non-raised runner Head Hunter)
Edelbrock Victor & Victor CNC, Edelbrock Victor Jr. CNC Oval & Rect
Edelbrock Performer RPM 454-O, 454-O, 454-R
Edelbrock Victor 24-degree Rectangular Port #77419, #77409
Edelbrock RPM XT Rectangle PN#51539
Edelbrock RPM XT Oval PN#51459
Edelbrock Victor PN#61409
Edelbrock Victor PN#61419
Edelbrock Victor PN#77609
Pro – Filer Sniper and SniperX 290 cc 320 cc and 375
Dart Pro 1 310 cc thru 355 cc, Race Series 265 cc thru 360 cc, Dart 380 Pro2
Canfield Big Block Chevy 24.5-800, 24.5-900
GMPP Signature Series BB Heads cast # 12363401, 12363391
Air Flow Research 265, 290, 305, 315, 335, 345, 357, 385, Oval, Rect & CNC Port
World Products Merlin II Oval & Rect. Port 269, 320, 345, 305, 350 Iron & Alum
(RHS) Pro Top Line Pro Thunder 320, 360 cc Alum & Iron
Big Block Ford Cylinder Head:
* Factory cast Iron heads (don’t’ think we’ll see many of them)
* A-429 Cobra Jet (Ford Motorsports)
* Cobra Jet (Blue Thunder, Trick Flow)
* Super Cobra Jet (Ford Motorsports, FRPP/Kaase)
* Blue Thunder “B” head
* Street Heat (Trick Flow)
* Edelbrock RPM
* P-51’s (Kaase)
* “A” designation heads (All manufacturers, Ford Motorsports, FRPP, Trick Flow, Eliminator, EX514, etc…)
Big Block Mopar
B-1 style cylinder heads only
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