1/8th mile Eliminator
.400 Protree Heads-up

((((((((ONLY TIRE RULES APPLY UNTIL QUICKER THAN 5.60))))))))

BODY:
Fiberglass/Carbon body panels are limited to hood, fenders, rear deck lid, doors and
bumpers. Cowl hoods may not be taller than half way point of the
windshield.

FRONT SUSPENSION:
Aftermarket front suspension components are allowed (but they must bolt-on
and mount in the stock mounting points). Must be for that car.

REAR SUSPENSION:
Stock type rear suspension or ladder bar only. Coil over shocks are
allowed. Anti-roll allowed. Aftermarket replacement control arms are
allowed. Stock frame rails must be in factory location, notching
permitted. Corvette permitted any type of transverse leaf spring rear
suspension. Wheelie bars are prohibited on all cars.

INTERIOR:
Stock appearing interior. Factory type dash accepted. Must have carpet or factory mat.
Rear seat can be removed.

EXTERIOR:
Prefer stickers on window. But limited stickers on body!
Lexan is permitted

ELECTRICAL:
Optical devices are prohibited. All entries must have operational head
lights and tail lights.

CYLINDER HEAD / ENGINE INDUCTION:
BOP High Ports and Ram Air 5 **call for tech**
Big block OE passenger car block base weight, aftermarket block see below
Big blocks limited to OEM stock valve angle, on all combos. Call or PM for approved
heads.
Cylinder heads limited to: 23 degree Raised Runner Chevrolet, 15 degree LS (LS1/2/6,
AFR 245,Dart,Pro1,Profiler LS1/6, P/N 215,Edelbrock 245,Procomp,World Products Warhawk,)ONLY!
18 degree Mopar, 20 degree Ford, OEM Ford casting 4v Modular, any 2v Modular
All SB power adder engines limited to 460 cubic inches.
All BB Power adders engines limited to 588 cubic inches.
SB N/A limited to 480 cubic inch(with added 7 lbs per cubic inch over 470) And BB N/A
limited to 632 and BOP power adder limited to 588
A engine in question will be measured with a P&G gauge. Correction factor 1.5%
will be used.
Competitors maybe asked to remove cylinder head for bore and stroke measurements
should any discrepancies arise.
Sheet metal intake manifolds are prohibited.
Single carb
No welding or epoxing cylinder heads or intakes that relocate runners.


POWER ADDERS:
Single type power adder only.

FORCED INDUCTION:
Single turbo or blower on all combos
Boosted cars are limited to small block entries ONLY.
Billet wheels allowed on 72mm
Max Turbo inducer/ with Maximum wheel diameter of 102mm, Maximum
exducer of 88mm with maximum turbine wheel diameter of 96mm. Reference Borg-Warner part # 171701 if any questions.
Max Turbo size 75mm Inducer / with Maximum wheel diameter of 106mm, Maximum exducer of 88 mm inducer with maximum turbine wheel of 96. Reference Borg-warner part # 171702
You may be required at any time to remove your turbo and/or your turbo
cover to be checked.
Maximum supercharger sizes F1,F1D,F1A,B7 JT-B,D1, V-7 JT Trim, NOVI 2200, Kenny Bell 3.6
allowed with weight
Air to water, Air to air intercooler,water meth injection,or straight meth allowed.
Can only run 1 style intercooler (Can't take weight break if using one of these)


Turbocharged (S475) and supercharged entries are limited
to stock valve angle SB combos only. SB CHEVY 23 DEGREE - SB FORD 20 DEGREE - 18
DEGREE MOPAR - FACTORY HEADED SMALL BLOCK FORD MOD MOTOR - LS CHEVY Heads listed
above ONLY!!CATHEDRAL PORT ONLY
No raised runner heads permitted on boosted application
No Co2 in car

NITROUS:
No multiple stages permitted. Second kit must be removed
No Pusher systems of any kind (No NANO or similar), No nitrous chillers (NO COLD
NITROUS)
Only 1 nitrous bottle allowed in car at a time.
No "leaking" nitrous in any way in any location.
Must have perfectly round jet orifice.
Purge plume must be entirely outside of the engine bay and directed
upward.
1 Nitrous and 1 Fuel Solenoid on all plate entries.

Big Block OEM Block Nitrous entries maximum jetting
1 jet .076
2 jets .053
8 jets .026

Big Block Aftermarket Block
1 jet .068
2 jets .048
8 jets .024

Small Block Nitrous entries maximum jetting
1 jet .082
2 jets .057
8 jets .028


TRANSMISSION:
Any OEM style automatic or OEM manual transmission is allowed with power
adder. Clutch assisted/clutchless manual transmission allowed on N/A.
Manual transmissions must utilize SFI approved bell housing.

WHEELS/TIRES:
Approved tires:
*ANY 26x8.5 or 235/60-15 drag radials,Mickey Thompson 3453 ONLY, also allowed smaller versions of the M/T S/S", Any Nitto, M&H, BFG or Toyo tire 275/60/15 or Smaller, Pro Tires allowed on SB N/A Combo's
*Wheel limit is 12"


BASE WEIGHTS:
* SB naturally aspirated - 2600
* SB nitrous - modular 3050
* SB nitrous - 3100
* SB turbo - 3100
* V6 turbo-3150
* SB & 6cyl supercharged - 3100
* BB NA 3100
* BBF NA 3150
* BBC nitrous 3225
* BOP nitrous 3200 with SB jets

No Awd or Fwd vehicles

WEIGHT PENALTIES AND DEDUCTIONS:
* Add 75pds BB 541 to 588 cubic inches(Nitrous)
* Add 75pds SB 441 to 460 cubic inches(Nitrous & run @ aftermarket bb jet)
* Deduct 50lbs for SBC, and SBF stock cast block. No deductions for LS Aluminum or
Cast Stock block
* Add 50pdsRaised-runner 23 SBC & Hi Port SBF Heads(N/A & Nitrous Only)
* Add 150pds
F1,F1D,F1A,B7 JT-B,NOVI 2200 Chargers
* Deduct 50pds 2V Mod motor(turbo or nitrous)
* LS limited to 9.2 deck height(Stock deck height)
* Deduct 50pds with a 4150 carburetor (NOS and N/A only)
* Deduct 50pds non intercooled
* Deduct 50pds for 6AL or 7AL used by itself(No Add On's)
* Deduct 100pds 8.2 deck blocks(NOS or N/A)
* Add 50pds for Any 16-18* heads or LS 15(rectangular port heads or heads not in
the above approved cylinder head list) and run with BB OEM jet
* No Trick Flow A heads allowed with Nitrous
* Add 100pds heads 15.0 or 14.9 LS heads and under run with BB OEM jet
* Add 150pds SB canted valve head run with BB aftermarket jet
* Grid ignition boxes cannot use any add-ons,except for ignition box
itself.
* With all the new heads that are coming out, we will look at them and
adjust periodically.
* Engine diapers are mandatory(Stock Block Entries)
* ANYONE caught cheating will be banned from all OSCA events
* After final round, both cars have to report to scales then to OSCA trailer for
jet and car re-inspection.
OSCA reserves the right: If one combo has a significant advantage ,we will
look at the rules and adjust them accordingly