A. All cars subject to inspection at any time
and must be free of mechanical defects and be in safe racing
condition.
B. Full face racing helmets meeting Snell 90
standards required and must be worn at all times the car is on
the track and must accompany vehicle at time of inspection.
C. Bucket seats are mandatory and must be
factory manufactured. Only approved seat installation and seat
structure accepted. Seat must be properly installed, and seat
backrest cannot be moved back farther than the roll cage rear
main hoop. No car will be permitted in competition unless seat
is properly installed.
D. Fire retardant uniform, fire resistant
gloves, fire resistant shoes and arm restraints are mandatory.
E. A 3” wide safety belt and shoulder harness
with 2 belts over shoulders, and a quick-release type are
required. Must have minimum of one submarine strap. All belts
must be securely fastened to frame or cage. Belts must be
replaced every three years beginning with belts dated 2001. Date
tag or stamp is required.
F. Shock-resistant roll cage padding on all
bars that driver’s head, legs and arms may contact while
strapped in seat is recommended.
G. Two throttle return springs and a steel toe
strap on throttle is recommended.
H. Front rock screen from top of hood to top
front halo and from roll bar is required.
I. There must be a 2” minimum clearance
between driver’s head with helmet and top of roll cage. Loops
may be used and must be constructed of same tubing requirements
as frame. These must be added in a safe manner.
J. No review mirrors allowed on or inside the
car.
K. Must have roll bar padding on main loop of
roll cage.
L. Must have a head net or seat brace for head
support.
SECTION I. CHASSIS
Sprint car configuration, Chrome moly construction, .095
minimum thickness top and bottom main
rails. Main frame rails must have a minimum outside diameter of
1 3/8 o.d. The engine is to be mounted in the center (no
offset). Engine is to be mounted in the front of the driver. No
vertical mounted engines. Minimum wheel base measured between
center of front hub to center of rear axle to be no less than
84". Must have complete roll cage. Seats need to be mounted with
minimum 3 bolts. All front axles to be made of steel
construction. All chassis must inspection.
Body Components conventional sprint car bodies. Hood must go
from the dash to the front torsion bars or past the front axle
center line. Body panels may not extend past the back edge
of the right tire. Right side body panels (arm guards)
mandatory.
SECTION II. WINGS
Top wings mandatory, Nose wings optional, Top wing
configuration of 16 (sixteen) square feet maximum, Side panels of top
wing 10 (ten) square feet maximum, Wicker bills of (1) inch
maximum.
No flaps or rudders may be attached to side boards or center
section. No by-level wings on top or nose. All wings must have
one piece center section.
No hydraulic or driver assisted wing movement allowed. Nose wing
Max center section measure of 2 (two) by 4 (three) feet max with
no wicker bill allowed.
SECTION III. TIRES
OCRS specified RIGHT REAR tire for all events
is the American Racer 102-16-0-15GT-OK tire. This is the only right
rear tire to be used in any event. All other tires brands
and/or compounds optional. All Tires subject to durometer
testing at any time. All tires must meet the durometer
specifications within 5 points.
SECTION IV. BRAKES
All participating cars must have minimum of one brake on the
front and one brake on the rear. No carbon fiber brake
components. Breaks must be in working order. If your brakes are not working before a race you will
not race. Brakes must be hydraulic type only.
SECTION V. FUEL
Methanol fuel only. No additives allowed. Fuel WILL BE tested
frequently and randomly. No oxidizers of
any kind. Fuel infractions are subject to
DISQUALIFICATION, FINES, and the possibility of complete REMOVAL
from any further competition.
This includes the OWNER AND DRIVER. THIS IS A NOT NEGOTIABLE
OR TOLERABLE.
Fuel cells and bladders mandatory. A fuel
shut off valve within reach of the driver required. No more
than 40 gallons of fuel allowed.
SECTION VI. WEIGHT RULES
Minimum weight rule includes the driver is 1500 lbs. This is
the minimum weight at race end. Cars will be weighed random
after heat races, dash and feature events. Any and or all cars may be weighted
after an event. Scales are available
before all events. Any added weight must be securely fastened
and painted white with the car # painted on the weight. 1499 lbs
is ILLEGAL.
SECTION VII. COMPETITIVE RESTRICTION
Minimum age to compete in an event is 16 (sixteen)
years of age. Proof of age will be required i.e.
birth certificate or legal drivers license.
SECTION VIII. ENGINES
368 Cubic inch maximum displacement. Steel blocks only. Flat
top pistons only, (no protrusions above piston face), No
internal reciprocating parts made of aluminum or titanium or any
thing other than steel. Water pumps to remain in the stock
location and must be belt driven. Wet sump oil systems only, no
external oil pumps or tanks of any kind. All competitors engines
are subject to inspection at any time. No crank trigger
ignition systems allowed.
SECTION IX. CYLINDER HEADS
OCRS BRODIX SPECIFIED CYLINDER HEADS PART #
CHEVEROLET SP-CH
FORD SP-FO
MOPAR
SP-MO
- All spec heads will be supplied with CNC bowl blend and
intake matching from Brodix.
- No grinding or blending of CNC work is allowed.
- No grinding or polishing of any kind is allowed anywhere
on the castings.
- No use of any substance that may change or alter the
shape or size of the ports or combustion chambers is
allowed.
- Valve seats and guides are to remain as manufactured and
in the cast position, valve must stay on the valve seat and
cannot touch aluminum.
- Valve angles are to remain as manufactured. The original
seat center locations as provided by the manufacturer may
not be altered.
- No tapering or reshaping or the valve guides is allowed.
- No minimum combustion volume.
- Serial #'s must remain on the head and must not be
altered or defaced.
- No welding modifications are allowed to the original
castings. Brodix will provide repairs and recertification.
- Valve stem may be no smaller than 11/32
The ONLY steel cylinder heads allowed for competition are original production for
Chevrolet only. These heads
must be straight plug castings that were produced for cars and
light trucks. Casting # 461x are illegal as with any angle plug
cylinder head. No aftermarket steel or aluminum cylinder heads
are allowed other than the specified head. Porting are
Polishing of the steel stock production head is legal. Ford and
Mopar cylinder heads must be the specified brodix head.
SECTION X. CARBURETORS
One 500 cfm holly 0-4412 5 point check legal carburetor
Venturi Bore Primary 1.373-1.377
Booster O.D. .620 (+or-) .010
Booster I.D. .380 (+or-) .003
Throttle Bore
1.6855-1.6865
Throttle shaft & Plate thickness Pri . 1868-.2008
Booster length
.434 (+-) .010
These dimensions will be checked with a go-no-go gauge.
Carburetors with injectors inside are illegal.
No air leak device of any kind.
SECTION XI. MUFFLERS
Mufflers are mandatory.
SECTION XII. TRACTION CONTROL
Traction Control devices of any kind is not allowed.
Electrical boxes or spark boxes and all wiring must be out of
cockpit area. RPM limiters are limited to 7000 rpm. Anyone found
with Traction control devices are subject to permanent removal
from any competition indefinitely. All violators will
be noted to all other sanction bodies.
SECTION XII IN-CAR ADJUSTMENTS
In-car adjustments of any kind are not allowed. This includes
but not limited to, Torsion bar adjustments, Wing adjustment
devices, Shock absorber adjusters and fuel adjustments. ECT.