Osage Casino Tulsa Raceway Park 2017 Radial Revenge Tour


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To the Osage Casino Tulsa Raceway Park 2017 Radial Revenge Tour. We would like to thank you for coming and racing with us. We would also like to thank all these great sponsors Strange Engineering, Precision Turbo & Engine, Proline, Wiseco, Induction Solutions, Mickey Thompson & Duck X Productions. We hope you have a great time while you are here. Tech is located at the east end of the pits. The fuel station is located at the north-east end of the pits along with the waste oil containers. The concession stand is right behind the main grandstands in the red brick building. The restrooms are located in the big white block building located in the middle of the pits on the north side. We also have a single shower on the east side of that building. The TRP souvenir stand is located in the white block building under the first set of the main grandstands. Race control and announcer’s suite is located on the second floor of the tower. We have enclosed in your racer packet the rules for each class and a complete schedule for the weekends event. Thanks again for racing with us here at Osage Casino Tulsa Raceway Park and please let us know if we can assist you in any way. Now let’s go racing and have some fun.

Notes:

Tack Address: 3101 N Garnett Rd Tulsa Okla. 74116

Track Radio Station: 102.7

Grand Prix Auto Parts 4915 E Admiral Pl Tulsa Okla. 74115 Phone:918-836-8487

Napa Auto Parts 6501 E Admiral Pl Tulsa Okla. 74115 Phone 918-836-7751

O Reilly Auto Parts 8101 N Owasso Exyp Owasso Okla. 74055 918-274-4440

Holiday Inn Express Owasso 7551 N Owasso Expy Owasso Okla. 74055 918-274-4100

Wyndham Hotel Tulsa 10918 E 41st Tulsa Okla. 74146 918-627-5000

RADIAL VS THE WORLD RULES

ANY CHASSIS PERMITTED
WHEELIE BARS PERMITTED
ANY TRANSMISSION PERMITTED
DUAL POWER ADDERS (PROHIBITED)
WEIGHTS LISTED BELOW ARE FOR RADIAL ENTRY (315 DOT) (3062R) (3362R)
+50 LBS (BB TT/SCREW ONLY) for any (PRO MOD CHASSIS) Tech Discretion
-50 LBS (Stock Wheelbase, Stock Appearing Body & No Wheelie Bars) (Must Have all 3)

** -50# for stock suspension (suspension for year make model car only)

SB N/A NO WEIGHT
BB N/A 2100 LBS
SB NOS 2200 LBS
BB NOS 2300 LBS (4.840 BORE ENGINES)
BB NOS 2350 LBS (5.00 BORE ENGINES)
BB NOS 2400 LBS (OVER 5.00 BORE ENGINES)

SB SINGLE TURBO 2600 LBS
SB TWIN TURBO 2500 LBS (Stock Bore Space)
SB TWIN TURBO 2600 LBS (Non-Stock Bore Space)
SB TWIN TURBO (500 CU IN +) 2900 LBS
-100 lbs. for SB TWIN TURBO (Cast Block / Cast Head)

SB PROCHARGER 2500 LBS
BB PROCHARGER 2750 LBS

BB TWIN TURBO 3050 LBS
BB TWIN TURBO (Non 481x / Non Hemi) 3000 LBS
BB TWIN TURBO (4.840 Stock Bore Space) 2900 LBS
BB TWIN SUPERCHARGER 2900 LBS
BB Single Turbo 2700 LBS
4 cyl. combos 2150 LBS (Production Engines Only)
6 cyl. combos 2500 LBS (Production Engines Only)

BB ROOTS BLOWER 2575 LBS
SB SCREW 2550 LBS
BB SCREW 2925 LBS

X275 Rules
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 lengthened and must meet all NHRA/IHRA height. (See ground clearance note below). Any beam tripping devices forward of the bumper are prohibited. (Track tech official will have final say) 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.

GROUND CLEARANCE:
Minimum 3 inches from front of car to 12 inches behind centerline of front axle, 2 inches for remainder of car, except oil pan, oil retention device, and headers.

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 from firewall to rear of door jamb. 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, only Chevy II or Dart permitted strut conversion). Shock tower can be notched or trimmed but must be in factory location, verifiable by the factory sheet metal being retained between frame rail and top of tower. 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 588ci. 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. (Cylinder head specs and list for BB Nitrous Combos attached)(Billet SB/BB blocks permitted with cast head only and 50 lbs.)

TURBOCHARGERS:
Single turbocharger limited to 88 mm maximum. (Garrett GTX55-88, Exile ETR-88, or = Forced Induction, Comp, Bullseye – mid frame or current (2013) Gen II Pro Mod MF88, PTE LF85 or LF88 turbos only). Turbocharger size will be verified by measuring the housing bore at the leading edge of the impeller wheel and must maintain the contour of the compressor housing. (Stepped or Clipped compressor wheel prohibited) Inducer dimensions will not exceed 3.462 inches and Exducer dimensions will not exceed 4.765 inches on MID FRAME turbos. Inducer dimensions will not exceed 3.462 inches and Exducer dimensions will not exceed 5.56 inches on LARGE FRAME turbos. The maximum diameter of the housing bore at the leading edge of the wheel may not exceed 2 mm more than the maximum allowable turbocharger size permitted. Inserts or reducers to achieve inlet or outlet dimensions prohibited. Any type of air to air or water to air intercooler permitted. Turbochargers w/nitrous-oxide prohibited except on 2-rotor, 4 cylinder, and inline 6 cylinder engines.
SUPERCHARGERS:
Cog or gear driven superchargers are permitted, must meet all factory inlet, outlet, and internal housing dimensions. Inserts or reducers to achieve inlet or outlet dimensions prohibited. Any type intercooler is permitted. Supercharger cannot be combined with nitrous oxide. Roots superchargers are limited to a 10-71. Centrifugal superchargers are permitted. Screw superchargers are not permitted.

NITROUS OXIDE:
Small block is permitted to run any type multi-stage nitrous systems. Big blocks are limited to a single stage fogger (2 nitrous solenoids, no limit on fuel solenoids) and two bottles are permitted or if using a single plate then your limited to (1 fuel solenoid, 1 nitrous solenoid), and 1 purge solenoid, purge must exit engine compartment. Big Block & Small block nitrous are permitted water injection. All EFI Big Blocks will only be allowed 2 nitrous solenoids for a dry nitrous system and will only have 1 line per nozzle/per cylinder. (Using both sides of the fogger nozzle on a dry EFI NOS BB combo are prohibited) (Cold nitrous systems permitted on big block combo and permitted on small block combo) All lines on big block combo must be visible and continuous from bottle to wye without interruption.

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 and nitrous small block combinations only. Electric shifters or air shifters are permitted.

INDUCTION:
Small Block combinations may run any type induction. Big Block combinations are limited to a dedicated single opening cast intake with a single carb or a single 4150 or 4500 series throttle body. (4 blade, dual blade or single blade throttle body permitted).

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. Meth injection prohibited. Water injection permitted on SB NOS combos only.

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 or ladder bar suspension cars only. Aftermarket four links are prohibited 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. (see notes below) Upper and Lower control arms must be mounted in the factory chassis locations -S Box permitted.

TIRES:
All cars with power adder must compete on a Drag Radial type tire with the following sidewall designation 275/60/15. Naturally aspirated combos are permitted to run a 28.0” x 10.5” slick, no “W” tires permitted.

MINIMUM BASE WEIGHTS (SVA applies to 23* GM 20* Ford 18* Mopar 15* LS heads)
All minimum base weights include the driver.
All weights set with 3754X Pro Tire, add 50 lbs. for lock up converter. Billet block permitted with cast head/intake only add 50 lbs.
* NA Small Block 2300 lbs. (28 x 10 slick or 28 x 10 Pro Bracket Radial and any transmission permitted)
* NA Big Block up to 648 cu in – stock bore space any cylinder head-any intake 2600 lbs.
— deduct 100 lbs. for under 588 cu inch (28 x 10 slick or 28 x 10 Pro Bracket Radial and any transmission permitted)
* Nitrous Small Block 2600 lbs.
Small Blocks (NOS & NA) with single 4150 carb/throttle body: deduct 50 lbs.
Small Block (NOS) with any plate system: deduct 50 lbs.
(does not apply if used in conjunction with a fogger)
Small Blocks (NOS & NA) with 23 degree Chevy heads, 20 degree Ford heads, and 18 degree Mopar heads: deduct 100 lbs. Raised Runners -75 lbs.
Small Block (NOS only) 18 -10 degree valve angle inline head: deduct 50 lbs.
Small Block (NOS only) cast Tunnel Ram/Sheet Metal 2 carbs – 2 throttle bodies: add 50 lbs.
— add 50 lbs. for 28 x 10 Pro Bracket Radial
* Nitrous Big Block 2850 lbs.
— 9.801 and up deck add 50 lbs.
— no additional weight for traditional style cross bar plate.
— deduct 50 lbs. for single nitrous solenoid cross bar plate/carb combo.
— plenum style nitrous plate add 50 lbs.
— fogger system add 150 lbs. (no line or bottle restrictions)
— add 50 lbs. for 28 x 10 Pro Bracket Radial
* Turbo Small Block 3050 lbs.
— base weight set with cast SVA inline/mod motor and LF88/GTX-55-88/PTE PM Gen II 85 or (billet or non-inline headed 80mm x 130 on M1)
— deduct 400 lbs. for GT47-76 with cast SVA (M1 permitted)
— deduct 350 lbs. for GT47-80 with cast SVA (M1 permitted)
— deduct 100 lbs. for GT47-88 with cast head
— deduct 100 lbs. for GT55-80 with cast inline head
— deduct 100 lbs. for GTX-55-85/LF 85
— deduct 50 lbs. for 8.2
— add 100 lbs. for inline non-SVA head
— add 50 lbs. for PTE PM Gen II 88
— add 150 lbs. for non-inline cylinder head
— add 250 lbs. for billet head on LF88/GTX-55-88/PTE PM Gen II 85
* Blower Small Block 3050 lbs.
— base weight set with cast SVA inline/mod motor and F1X or XB105 (add 50 lbs. for M1)
— deduct 350 lbs. for 8-71 with billet block/cast head
— deduct 50 lbs. for 8.2 deck
— deduct 50 lbs. for Billet Xi (add 50 lbs. for M1)
— deduct 150 lbs. for cast Xi (M1 permitted)
— deduct 200 lbs. for F1R (M1 permitted)
— deduct 250 lbs. for F1C-10.5 (M1 permitted)
— add 50 lbs. for non-inline with billet Xi
— add 100 lbs. for non-inline/non SVA cast head on F1X or XB105
— add 150 lbs. for Gen III Mopar billet head (only blower combo permitted with billet head)
— add 50 for 28 x 10 Pro Bracket Radial
*Small Blocks (NOS & NA) with single 4150 carb/throttle body: deduct 50 lbs.
— *Small Block (NOS) with any plate system: deduct 50 lbs. (does not apply if used in conjunction with a fogger)
— *Small Blocks (NOS & NA) with 23 degree Chevy heads, 20 degree Ford heads, and 18 degree Mopar heads: deduct 100 lbs. Raised Runner -75 lbs.
— *Small Block (NOS only) 18 -10 degree valve angle inline head: deduct 50 lbs.
— *Small Block (NOS only) cast Tunnel Ram/Sheet Metal 2 carbs – 2 throttle bodies: add 50 lbs.
— *Throttle bodies exceeding 4500 series on Big Block NOS combinations: add 50 lbs.
— *Non Intercooled boosted cars on gasoline: deduct 100 lbs.
— * Belt driven centrifugal and roots style superchargers: deduct 100 lbs.
— *Aftermarket rear suspension COPO Chevy and Drag Pack Mopar permitted on the new Camaro and Challengers must be mounted in exact factory location on body/frame. Torque arm on late model GTO and 5th gen Camaro permitted. Corvette with any leaf spring or ladder bar type suspension permitted.
— * Buick/Olds/Pontiac/Mopar B1 Nitrous Combo will be 3000 lbs. and not exceed 588 cubic inches.
— V6/I6/I4 turbocharged – supercharged – nitrous combos will deduct 250 lbs. from base weight on gas and 150 lbs. if on alcohol.
— Factory IRS deduct 100 lbs.
— Deduct 100 lbs. for the 3754R tire
**Cold Nitrous -6 and -4 nitrous line(s) must be of standard braided line construction, (high pressure hydraulic line prohibited as they exceed the internal diameter of industry standard)
Standard spec lines/fittings only.
Lines
-4 I.D. .153 to .154
-4 I.D. with -6 Nut .153 to .154
-6 I.D. .275 to .276

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:
• 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, BB3X, SR23
(non-raised runner Head Hunter)
• Edelbrock MC – 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 cc
• 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, 325, 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
*
If one combination appears to have an advantage rules may be changed at the race director’s discretion at ANYTIME in order to keep a level playing field for all competitors

MX235 Rules

FORMAT: This is a heads up 1/8th mile class run on a .400 Pro tree with a Professional Pairing Ladder. Auto-Start and Courtesy Staging is in effect. MX235 Top 16 Qualifiers will run in the “Front Runner” class while cars that did not qualify in the 16 car field may be eligible for a “Second Chance” Race. (32 Car Field or All Run Format may be used at certain events.)
SAFETY: All NHRA/IHRA and Local Track Safety rules apply for driver and car, the use of an oil retention device is MANDATORY.

CHASSIS: Complete stock chassis and front frame rails must be retained from motor plate/shock tower to behind the rear wheel opening (for non back-halved cars only). Back-halved cars are permitted. All aftermarket front suspension components are allowed. All replacement parts must be in stock location. Aftermarket bolt-on replacement front k-members/sub frames are allowed. Struts or relocated shocks are permitted. All aftermarket bolt-on front ends are legal. Mini tubs are allowed. Anti-sway bars 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. Stock suspension, ladder bar, and torque arm only. Aftermarket 4-links are prohibited. No Wheelie Bars. Factory wheelbase must be maintained within +/- 1 inch.

INTERIOR/BODY: Factory appearing (aftermarket parts are allowed) interior is required. Factory floor pan on driver and passenger side required from firewall to rear of door jamb. Firewall must be in stock location; minor modifications for transmission, etc. are permitted. Headlights and taillights must be functional. Aftermarket fiberglass or carbon fiber replacement panels are allowed. All front ends must be factory appearance and cannot be stretched. No extenders or stripe takers. Lexan or OEM Glass windows.

ENGINE: Maximum displacement for all engines is 640 cu. in. Small Blocks are allowed any deck height, but must remain stock bore spacing. GM Big Blocks are limited to 10.2 deck height. Ford Big Blocks are limited to 10.3 deck height. Mopar Big Blocks are limited to 10.7 deck height. Billet heads are prohibited for both SB and BB combinations.

TRANSMISSION: Any transmission permitted.

TURBOCHARGERS: Single turbocharger limited to 88mm maximum. Twin turbochargers limited to 72mm maximum. Inducer dimensions will not exceed 3.5039 inches. Turbocharger size will be verified by the measurement of the housing bore at the impeller wheels leading edge. The housing bores diameter at the leading edge of the wheel may not exceed 2mm more than the maximum allowable. Inserts or reducers to achieve inlet dimensions are prohibited. Turbochargers with nitrous oxide are permitted only on rotary, 4-cylinder, and 6-cylinder engines.

SUPERCHARGERS: Centrifugal and roots superchargers are permitted, must meet factory housing dimensions. Inserts or reducers to achieve inlet dimensions are prohibited. F-2 or equivalent allowed. Roots supercharger limited to 14-71. Screw superchargers are prohibited. Cannot combine supercharger with nitrous.

 

NITROUS: Multiple bottles must WYE together to a single -6 line. Small block nitrous is permitted to run any multi-stage nitrous system. Big block nitrous as a single stage fogger, must use -4 nitrous line maximum from WYE to solenoids. Electronic fuel injection allowed, only 8 nitrous feed lines on engine. Two stage nitrous plate allowed. Push nitrous systems are prohibited.

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, methanol, or E-85 is allowed.

TIRES: All cars must compete on a 235/60/15 radial, 26/8.5/15 radial, or 26/8.5/15 slick.

WEIGHTS:
All minimum weights include the driver.
Naturally Aspirated:
– Small Block – 2,350 lbs.
– Big Block – 2,600 lbs.

Nitrous:

  • Small Block Nitrous (Inline Head) – 2,650 lbs.
  • Small Block Nitrous (Non-Inline Head) – 2,700 lbs.
  • Big Block Nitrous (Up to 604 cu. in.) – 3,100 lbs.
  • Big Block Nitrous (605 to 640 cu. in.) – 3,150 lbs.

Supercharger:
– Single YSI/F1A/8-71 Supercharger (Small Block) – 2,800 lbs.
– Single F1C/10-71 Supercharger (Small Block) – 2,950 lbs. (Deduct 50 lbs. for 8.2/8.7 Deck) (Deduct 50 lbs. for Cast Stock Valve Angle) (Add 50 lbs. for F1C-10.5)
– Single F1R/Xi/12-71 Supercharger (Small Block) – 3,100 lbs. (Deduct 50 lbs. for 8.2/8.7 Deck) (Deduct 50 lbs. for Cast Stock Valve Angle)
– Single F1X/F2/XB105/14-71 Supercharger (Small Block) – 3,200 lbs. (Deduct 50 lbs. for 8.2/8.7 Deck) (Deduct 50 lbs. for Cast Stock Valve Angle)

Turbocharger(s):
– Single 76mm T6 Turbocharger (Small Block) (Mid Frame) – 2,900 lbs.
– Single 80mm T6 Turbocharger (Small Block) (Mid Frame) – 2,950 lbs.
– Single 82mm T6 Turbocharger (Small Block) (Mid Frame) – 3,000 lbs.
– Single 84mm T6 Turbocharger (Small Block) (Mid Frame) – 3,050 lbs.
– Single 88mm T6 Turbocharger (Small Block) (Y2K, GT47-88) (Cast Mid Frame) – 2,900 lbs. (Deduct 50 lbs. for 8.2 Deck)
– Single 85mm T6 Turbocharger (Small Block) (Pro Mod 85) (Mid Frame) – 3,250 lbs. (Deduct 50 lbs. for 8.2 Deck and/or Cast Stock Valve Angle)
– Single 88mm T6 Turbocharger (Small Block) (GTX55-88, Pro Mod 88, etc.) (Mid Frame) – 3,300 lbs. (Deduct 50 lbs. for 8.2 Deck and/or Cast Stock Valve Angle)
– Single 85mm T6 Turbocharger (Small Block) (Large Frame 85/GTX55-85) – 3,150 lbs. (Deduct 50 lbs. for 8.2 Deck and/or Cast Stock Valve Angle)
– Single 88mm T6 Turbocharger (Small Block) (Large Frame 88) – 3,200 lbs. (Deduct 50 lbs. for 8.2 Deck and/or Cast Stock Valve Angle)
– Twin 67mm Turbochargers (Small Block) – 3,200 lbs. (Deduct 50 lbs. for Cast Stock Valve Angle)
– Twin 72mm Turbochargers (Small Block) – 3,250 lbs. (Deduct 50 lbs. for Cast Stock Valve Angle)

Weight Additions and Deductions:
– Deduct 200 lbs. for Mod Motor
– Deduct 50 lbs. for Leaf Spring

  • Deduct 50 lbs. for Any Nitrous Plate System
  • Add 50 lbs. for Small Blocks (Nitrous Only) with Cast Tunnel Ram/Sheet Metal/2 Carbs or 2 Throttle Bodies
  • Deduct 100 lbs. for Blow Through Carburetor on Boosted Applications
  • Deduct 150 lbs. for Single T4 Turbocharger
  • Deduct 100 lbs. for Twin Turbochargers smaller than 67mm.
  • Deduct 500 lbs. for 4-Rotor and Inline 6-Cylinder Combinations
  • Deduct 300 lbs. for V6 Combination
  • Deduct 800 lbs. for 2/3-Rotor and 4-Cylinder Combinations

  • Deduct 250 lbs. for any Buick, Olds, or Pontiac combination.

  • Deduct 100 lbs. for IRS

  • Deduct 300 lbs. for Front Wheel Drive

LIMITED 275

FORMAT:

This is a 1/8 mile heads-up class run on a .400 pro tree with a pro ladder. All run field. Courtesy staging and auto-start is in effect. It will be run on a pro ladder.

SAFETY:

All NHRA/IHRA and Local Track Safety rules apply for driver and car, including the use of an oil retention device or engine diaper.

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. *Add 3lbs per ci over 588 on big blocks. 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 GT47/S400(mid frame) chassis only. All turbochargers must be manufactured from factory. 88mm turbos are limited to standard GT47-88mm/S400-88mm turbochargers only (Excluding 88R, 88T or equivalent). If you have a question about legality please contact the organization for clarification. Turbochargers w/nitrous-oxide prohibited.

No hybrid turbochargers. All turbochargers must have a model and serial number.

All turbochargers will have the compressor cover removed for tech inspection.

Cast inline valve head only.

SUPERCHARGERS:

Cog or gear driven superchargers are permitted, must meet all factory inlet, outlet, and internal housing dimensions. Cast inline valve head only.

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 is limited to (1 fuel solenoid, 1 nitrous solenoid), and 1 purge solenoid, purge must clearly exit engine compartment. Single stage plate limited to a 125 jet on BB combinations and 150 on SB Combinations with the Cross Bar plate limited to two 82 jets. All nitrous systems are limited to a -6 line. All fogger combinations are limited to a 36 jet unless otherwise specified. 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 allowed on NOS combinations.

No Cold Nitrous.

All jets must have a round orifice.

No Wizard of Nitrous (WON) systems

No water injection

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.

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/E85 only are permitted. 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 to the lanes and 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 50lbs

All minimum weights include the driver

Small Block

All small block weights are based on a standard deck height.

Naturally Aspirated (small block) 2500lbs

*Non-RR 23 degree Chevy heads, 20 degree Ford heads, and 18 degree Mopar deduct 100lbs

Big Block

Naturally Aspirated (big block) 2700lbs

NITROUS WEIGHTS:

Small Block

  • Small Blocks with 23 degree Chevy heads, 20 degree Ford heads, and 18 degree Mopar heads 2800lbs
  • Small Block 23 degree raised runner head 2900lbs

  • Small Block 18-10 degree valve angle inline head and LS 15-11 degree valve angle head 2900lbs

  • The above small blocks only limited to 40 jet with fogger, 150 single entry plate, or 82’s dual entry plate.

  • Nitrous SB2/SC1 head combinations 3150lbs and limited to 36 jet

  • Small block is 455ci or smaller. *Add 3lbs per ci over 455 on small blocks.

  • Buick/Olds/Pontiac Nitrous combos will be 3150lbs and not to exceed 588 cu inches.

  • Big Block

    *Nitrous Big Block single stage standard/tall deck height and conventional heads 3250lbs limited to 36 jet in fogger, 125 in single entry plate or 82’s in dual entry plate.

    SUPERCHARGER WEIGHTS:

    F1A – 3100lbs

    F1C – 3150lbs

    YSI – 3150lbs

    • Belt driven centrifugal superchargers: deduct 50lbs

    TURBO WEIGHTS:

    76 mm – 3100lbs

    76 mm – 3150lbs Billet wheel

    80 mm – 3150lbs

    80 mm – 3250lbs GT55

    88 mm – 3300lbs

    No Billet wheels on 80mm or 88mm turbo combinations. No Reducers on turbo or supercharged combinations. All turbochargers (mid frame only) and superchargers must be as manufactured from factory.

    • Non-Intercooled boosted cars on gasoline: deduct 50lbs

    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

    All cylinder heads must be mass produced with a part number (no one offs allowed).

    TECH:

    All engines are subject to valve angle, port location, and displacement verification at any time

    Nitrous limits and turbo size will be verified before each event and at random during the event as deemed necessary by tech officials

    THE RULES MAY BE ADJUSTED AS NECESSARY IN AN EFFORT TO MAINTAIN PARITY

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