OPEN WHEEL MODIFIEDS

This is a protest division.

A.  MINIMUM WEIGHT

2500 LBS.  AFTER RACE WITH DRIVER -

NO TOLERANCE

B.  ENGINES

Engines must be based on American Factory Design.  Must be naturally aspirated (carbureted).  Steel Blocks & Heads Only.  Maximum cubic inch is 362.  No titanium or exotic materials.  Must have operating self starter.

C.  CRANKSHAFT

1.  Minimum 48 lbs.  Balancing okay.

2.  No cutting of counter weights.

3.  No knife-edge cranks

D.  RODS

1.  Any steel rod-polished steel okay

2.  No titanium, aluminum or other billet rods

E.  HEADS

1.  Edelbrock Performer or Performer RPM intake mandatory

2.  Steel heads only.  No porting, polishing, or gasket matching.  Flat top  pistons only.

Valves - Ford 2.02 x 1.654

Chevy 1.94 x 1.50

Mopar 2.02 x 1.625

3.  HEAD CLAIM - $1,750 will be strictly enforced.  Claim has to be done by the driver on front straight immediately after feature and only by cars finishing on lead lap.  Limit to number of claims by driver may be imposed.  Money to be taken directly to flagman, he will alert car being claimed, car will then be impounded and pushed to tech.  If you leave the racing surface and exit out turn 1 gate, there will be no claim allowed.  The claim shall consist of heads, valves, valve springs, keepers and rocker studs.  Does not include rocker arms or stud girdles.

4.  Angle Milling allowed.

5.  No titanium valves

6.  No aluminum heads

7.  Roller rockers optional--stud girdle optional--screw-in studs optional.

8.  Valve springs optional--okay to machine for bigger springs

9.  Stock lifter size for motor used.

10.  Ford must run stock valve spring diameter an push rod stain less steel valves optional--NO PORTING, POLISHING OR GASKET MATCHING ALLOWED

F.  INTAKE

1. MANDATORY - Only Performer or Performer RPM Intake allowed - NO PORTING, POLISHING OR GASKET MATCHING ALLOWED

2.  These Intakes are legal:

PERFORMER:   FORD  351 W - 2181

FORD  351 C - 2665

MOPAR  - 2176

CHEVROLET  - 2101

CHEVROLET  - 2104

CHEVROLET VORTEC  - 2116

PERFORMER RPM:   FORD  351W - 7181

FORD  351C  - 2750

MOPAR  - 7176

CHEVROLET  - 7101

CHEVROLET VORTEC - 7116

3.  Adapter Spacer - Maximum 1-1/2" total + (2) .060 gaskets (1 on top and 1 under)

G.  CARBURETOR

1.  Must use (1) 2-barrell carburetor as follows:

Holley #4412 500 CFM + carburetor MUST PASS East Bay Raceway Park gauges.

2.  MODIFICATION ALLOWED

1.  Choke plate may be removed

2.  Jets and power valve optional.  Billet metering blocks allowed.

3.  NO OTHER MODIFICATIONS TO INCREASE AIR FLOW

4.  ONLY straight-type squirter modifications to the carburetor or any of its components, or substutions of other than Holley parts without prior written permission of East Bay Racway Park officials will cause the vehicle to be classified as illegal.

H.  FUEL TANKS

1. 22-gallon maximum (32 gallons in existence will grandfathered in).  NO ELECTRICAL FUEL PUMPS

2.  FUEL - Petroleum Base ONLY (GAS)

3.  Regular pump-type gas, CAM 2 Sunoco or equivalent

4.  NO TRICK ADDITIVES - NO ALCOHOL, ETC.

I.  DISTRIBUTORS

1.  OPTIONAL - NO MAGNETOS - Any single battery fired ignition system okay.

2.  MUFFLERS MANDATORY!  SCHOENFELD #112535  98 decibels measured at trackside

3.  NO TRACTION CONTROL DEVICES OF ANY TYPE

J.  CAM SHAFT

1.  Any flat tappet CAM and lifters - NO MUSHROOM LIFTER OR ROLLER CAMS

2.  Fords check with tech

3.  Stock lifters size for motor used.

K.  FRAME

Factory production complete 1960 or new perimeter American rear-wheel drive passenger car frame only.  NO sports car frames.  Frames must extend back to behind drivers seat.  Frame cannot be widened or narrowed.  Front crossmember may be notched and boxed for radiator and /or steering clearance only.  Minimum wheel base is 108 inches both sides.  Maximum overall width (front or rear).  Shall not exceed 78 inches from outside of tire to outside of tire.  Outside of tires must be widest part of car.  No part of car can be lower than four inches from ground except from crossmember and oil pan.  Frames may only be cut at point no further forward than 36" from center of rear-end housing.  Factory or tubular manufactured lower a-frames OK. Both side a-frames must measure same from bushings to ball joint.

L.  ROLL CAGE

Minimum 1.5 inch O.D.  with a minimum thickness of .095 inch for main cage.  Drivers head must not protrude outside cage with helmet on.  Roll cage msut be securely supported and braced with minimum on crossbar in top halo.  Foot protection bar required.  Main cage no further forward than rear of engine.  All bars forward of cage must be lower than hood.

Minimum of three driver side-door bars required, at least 1.5-inch O.D. and .083-inch wall thickness, as parallel with ground as possible, and perpendicular to driver.  Must be welded to front and rear of roll cage.  Passenger side must have at least one cross-door bar, horizontal, or angled, minimum 1-25-inch O.D.  Driver's side steel door plate, 18-gauge or .049-inch minimum thickness, must be securely welded to outside of door bars.  Plate must cover area from top door bar to bottom door bar and from rear hop down-post to five inches in front of seat.  Must be visible for inspection.

M.  BODY

Must be same width, front to rear, and paralleled to frame.  Engine compartment must remain open (no side panels).  Hood must be enclosed at rear.  Must have front and rear window posts.  Driver and passenger side windows must have a minimum of twelve-inch opening, measured at center of window.  Nose piece may have 1" fins or each side for strength.  Rear tail light panels are optional.  No aerodynamic tunnels.

N.  DRIVER COMPARTMENT

Must have a minimum of three windshield bars and full window screen (minimum 1" x 2").  Minimum .125-inch aluminum, or .060-inch steel, complete floor pan required.  Must go past back of seat.  Driver must be completely sealed off from racetrack, drive line, engine, fuel cell, canisters and pumps.  Oil coolers must not protrude above interior.  No drive activated devices to adjust anything on car except brakes will be allowed (i.e. wheel base or weight jacking).  No mirrors

O.  SHOCKS

One steel shock per wheel only.  Two additional shocks allowed on rear suspension (one on top of rear end-one on torque arm).  No coil over shocks with small springs., air shocks, remote reservoir shocks, or Schrader valves.  Coil over eliminators or coil over shocks with minimum 4.5" spring allowed.

P.  SPRINGS

Steel only.  One coil and /or leaf spring per wheel only.  One additional spring allowed on rear suspension.  Any coil spring must be at least 4.5 inches O.D.  No torsion bars or air bags.

Q.  REAR END/SUSPENSION

Rear end - steel or aluminum bird cages allowed.  Steel tubes only.  No aluminum tubes allowed.  No sprint car style open tube rears.  No aluminum trailing arms.  No wide 5 HUBS.  Minimum 4 1/2" springs anywhere on suspension.  No coil over springs.  Torque arms with 4 1/2" springs O.K.

R.  TRANSMISSIONS

Optional.  Must have neutral and working forward and reverse.  Must be able to go forward and backward with engine running.  NO in/out boxes.  Bert, Brinn or automatic allowed.

S.  ENGINE LOCATION

Rear of engine (bellhousing flange) must be mounted 72 inches forward from the center line of rear axle.  Engine offset must be kept within two inches of centerline of front crossmember with engine level.  Eleven-inch height minimum from ground to front center of crankshaft.

T.  TIRES AND WHEELS

Track approval Hoosier A40 or D40 only.  Eight-inch steel wheels only.  Steel bead lock on right rear only.

  No tire softeners.  No soaking of tires.  No preheating of tires.  No chemicals of any type which alter softness of rubber allowed on or inside tire except oxygen or nitrogen.  If found, tires will be confiscated, driver will receive a minimum of $500 fine, loss of all points accrued to that

date and/or possible suspension.  This could turn into a EPC problem if it continues.  No grinding or removal of factory markings.  No snow chains.  Grooving, cutting or siping of tires is allowed for regular season races.  During WinterNationals events grooving, cutting or siping is NOT allowed.

U.    SPOILERS:  8” SPOILERS ALLOWED.  Clear Lexan only.  NO ALUMINUM OR STEEL.  Side braces 18” maximum length X 8” high.  1” fins on each side of nosepiece allowed.  NO spoilers, wings, tunnels or aerodynamic enhancing devices allowed on car except on rear deck or nose piece.

V.  FRONT SUSPENSION

All components must be steel and in stock location.  Rubber, nylon or steel lower A-Frame bushing only. All lower A-Frame mounts and bolt holes on frame must be in stock location.  Tube type upper A-Frames allowed, can be moved, cross shaft may be aluminum. 

Lower A-Frames stock or square tube manufactured replacements.  Square tube replacement a-frames must have same measurements between bushings and ball joints as stock and should measure the same on both sides.

W.  BUMPERS

All bumpers must be rounded and turned back towards frame.  NO Rough or jagged ends allowed.

X.  STEERING

Stock steering box only.  Tie rods optional.

Y.  MUFFLERS

#112535  Schoenfeld Mandatory. 

98 decibel nose level per car maximum measured at trackside.  All muffler must remain on vehicle and be in working condition throughout race.

Z.  DRIVESHAFT

No aluminum driveshaft.  Carbon fiber driveshaft allowed.  No titanium driveshaft.

RULE BOOK DISCLAIMER

The rules and/or regulations set forth herein are designed to provide for the orderly conduct of racing events and to establish minimum acceptable requirements for such events.  These rules shall govern the condition of all events, and by participating in these events, all participants are deemed to have complied with these rules.  NO EXPRESS OR IMPLIED WARRANTY OF SAFETY SHALL RESULT FROM THE PUBLICATION OF  OR COMPLIANCE WITH THESE RULES AND/OR REGULATIONS.  They are intended entirely as a guide for the conduct of the sport and in no way guarantee against injury or death to any participant, spectator or official.

The race director or Head Tech Inspector shall be empowered to permit reasonable and appropriate  deviation from any of the specifications herein or impose any further restrictions that in their opinion do not alter the minimum acceptable requirements.  ANO EXPRESSED OR IMPLIED WARRANTY OF SAFETY SHALL RESULT FROM SUCH ALTERATIONS OR DEVIATIONS.  Any interpretation or deviation of these rules is left to the discretion of the officials and is final and binding.

On occasion when situations arise that are not covered by written rules herein, special rulings may be put into effect by the track officials.  Once such rulings are acted upon, they may become an act of policy and will be added to the existing rules of procedures.