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OPEN WHEEL MODIFIEDS |
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 inside tire except oxygen or nitrogen. If found, minimum of
$500 fine, loss of all points accrued to date & possible
suspension. This could turn into a GPC problem if it continues.
No grinding or removal of factory markings. No snow chains. No
grooving, cutting or siping of tires.
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. No carbon fiber driveshaft. 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 expressed or implied warranty of
safety
shall result from the publication of or compliance with these
rules and/or
regulations. They are intended as a guide for the conduct of the
sport and in
no way a guarantee against injury or death to a participant,
spectator, or
official.
The race director shall be empowered to permit reasonable and
appropriate
deviation from any of the specifications herein or impose any
further
restrictions that in his opinion do not alter the minimum
acceptable
requirements. No expressed or implied warranty of safety shall
results
from such alterations of specifications. Any interpretation or
deviation of
these rules is left to the discretion of the officials. Their
discretion is final.
On occasion when situations arise that are not covered by
written rules,
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.
The Management of East Bay Raceway Park
THE MANDATORY MUFFLERS FOR ALL
CLASSES IS SCHOENFIELD #112535
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