CENTRAL MISSOURI SPEEDWAY
2008
STREET STOCK SPECIFICATIONS1.) Body/Frame/Steering:
a.) Cars must be 1964 or newer with stock firewall and floor intact and pedals in stock location.
b.) All body parts must be steel. Aluminum allowed for “hole fillers.” After market steel body panels allowed. No ground affects.
c.) The rear of car trunk can be cut out to center of rear end.
d.) Passenger side may be covered, but a removable or hinged inspection cover at least 12" by 12" must be installed.
e.) Wheel base must be 107" minimum both sides measured center lower ball joint to center rear axle housing.
f.) No sport cars i.e. Mustang, Corvette. No station wagons or trucks. Camaro with 108 inch wheel base allowed i.e. 1970-82.
g.) Must retain full stock bumpers not to exceed outside of tire tread, and edges must be rounded and smooth. After market or home built bumpers must stay within quarters of the body.
h.) Hood must clear air cleaner, or hole for air cleaner allowed provided it is boxed in completely with no openings.
i.) Must retain stock steering box in stock location. Quick steering may be added only if it is professionally manufactured.
j.) Front of car must be stock appearing. No wedge nose.
k.) Car and driver must weigh 3,100 pounds after feature.
2.) Roll Cage/Braces:
a.) Must be 4 post cage with rear and front brace loops. Loops must be the width of the frame with a maximum of 2 horizontal and 2 vertical bars behind front bumper.
b.) There must be a minimum of 4 side door bars on the driver’s side.
c.) All of the cage tubing must be a minimum of 1-1/2" O.D. and minimum of .093 wall thick.
d.) If fuel cell protrudes below trunk floor, a loop must be installed behind it lower than cell attached frame rail to frame rail and braced. Exposed cells will be in metal can.
e.) Each cage must have guard bars centered in front of driver’s face. If constructed of tubing, there must be at least 3 bars with a maximum 4" between center lines and must be a minimum of 3/8" O.D. . If constructed from solid bar, there must be 4 bars with a minimum of 3" between center lines and must be a minimum of 1/4" O.D. All of the bars must be welded in place.
f.) All cage construction will be inspected by the Tech Official and must be approved.
3.) Tires/Wheels:
a.) Maximum tire sizes allowed: 275-60/15 or 255-70/15. Must be DOT approved.
b.) No truck, R.V. or mud and snow tires. No recaps.
c.) I.M.C.A. stamped G-60 (KK-704) McCreary American Racer allowed. Modified takeoffs allowed.
d.) Tires may be sipped and grooved.
e.) Steel wheels only with maximum 8" bead width.
f.) Bead lock and/or mud plug on all four wheels is allowed.
g.) No bleed-off valves.
4.) Suspension/Brakes:
a.) All suspension components must retain stock location on chassis.
b.) Shocks must be stock appearing, steel and rubber or urethane bushed. No rod ends.
c.) Springs must be stock appearing and rear coils must be 5" minimum. No mono-leafs or plastic.
d.) No pan hard bars. No lift or pull bars. After market rear trailing arms are allowed. After market upper control arms allowed. No Hiems type, tube type only. Trailing arms must measure same, center to center.
e.) No weight jacking type of devices allowed. No adjustable leaf spring shackles. No adjustable brackets on rear end or front suspension.
f.) Ball joints must be stock type, may be heavy duty and reinforce with a strap welded across arm to help keep them in.
g.) All brake components must be OEM. No after market components. Rear drums may be replaced with disk provided they are OEM type components. No drilling except lugs.
h.) Brakes must operate on all 4 wheels and no shut off or adjustable valves allowed.
5.) Transmissions/Clutches/Third Member:
a.) Transmission must be OEM with all forward and reverse gears functional.
b.) No aluminum flywheel, mini-clutch, coupler or in and out box allowed.
c.) No after market clutches. Automatics must operate with factory torque converters. No down-sized torque converters.
d.) Car must start and move under its own power.
e.) 9" Ford or floater rear ends allowed in any car, but must mount in stock location.
f.) No quick change rear end.
g.) No aluminum drive shafts, and drive shaft must be same diameter as OEM.
h.) Rear end may be locked. Mini-spool is allowed.
6.) Engines:
a.) Engine must match body make: i.e. Ford to ford, GM to GM, etc.
Must be OEM cast iron Block American make V-8 engines.
Engine casting numbers can not be altered. Maximum 390 CID (2009 rules).
Heads - after market heads allowed. Has to be 23 degree minimum 64cc.
Guide plates, screw in studs, full aluminum roller rockers allowed. Stud girdles and shaft rockers allowed.
Flat top piston 2 valve relief or 4 valve relief or dished pistons for (2009)
350 Block only for Chevy
351 Block only for Ford
360 Block only for Chryslers
Track has options to enforce these restrictions with cubic inch pump gauge or by visually checking parts and part numbers.
DISQUALIFICATION AND LOSS OF POINTS IF FOUND ILLEGAL.
b.) Engine no further back than center #1 plug hole with center upper ball joint. Solid motor mounts allowed.
c.) Intake manifold must be Edelbrock Performance intake
2101 Chevy
2121 Ford
2176 Chrysler
NO EXCEPTIONS - NO PORTING OR GASKET MATCHING
d.) Factory OEM mechanical type fuel pumps only.
e.) Factory OEM wet sump oil pump only, no belt drives. After market oil pan allowed. No oil accumulators.
f.) Factory OEM distributors only. Can use after market coils and modules.
g.) Factory OEM 2 barrel carburetors or Holley 500 2 barrel. Bores are not to exceed 1-11/16". Choke horns may be removed, linkage may be altered, jets may be changed, 1-11/16". Choke horns may be removed, linkage may be altered, jets may be changed, springs may be changed, 1 spacer under carburetor up to 2", and after market air cleaner allowed.
h.) Racing tube type exhaust headers allowed.
i.) Cams must be flat tappet cams only. No mushroom or roller lifters allowed. Can not alter lifter bores.
j.) Factory OEM type water pump must be used and any other coolant system components can be after market or modified to suit your needs.
k.) Valve covers may be modified or after market value covers may be used.
7.) Fuel/Fuel Cell:
a.) Pump gasoline or racing gas only. No alcohol or performance enhancing additives of any kind allowed.
b.) Fuel cells will be a racing type bladder with tip over valve or check ball type valve installed on any vent to or on the fuel cell.
c.) If bottom of fuel cell bladder is not completely protected by trunk floor, it will be enclosed in steel container.
d.) No fuel cells larger than 22 gallons.
MUST HAVE VISIBLE NUMBERS ON BACK OF CARS
MUST HAVE 2 TETHERS ATTACHED TO REAR BUMPER
REFER TO GENERAL CAR AND SAFETY RULES in “Track Rules & Regulations” for more pertinent information.