SCRAFAN.COM - Shasta Raceway Park Spec Sprint Cars

NOTE: This class is designed with the intentions that the average dirt type spec sprint car will be competitive to run on pavementwith little to no changes other than tires &possible better brakes. Wide body asphalt coil over cars are not allowed. The intention of this class is so a team could very easily run dirt on Friday & pavement on Saturday. This will give drivers & teams the chance to add to their portfolio and try different types of racing. This class is a work in progress so please be patient.

1. Open to any sprint car tubular chassis. NO 2x4 modifed frames. Officials descretion.
2. Minimum cage structure to be no less than 1 3/8" with .095 minimum wall thickness. Cage must extend above drivers helmet, a halo bar will be required if helmet is not below bottom of top roll bar.
3. Wheelbase minimum 84", with a maximum of 92".
4. Motor, body, seat, rearend center section and fuel tank must be mounted to centerline of chassis.
5. All cars must weight 1700 lbs. with driver and all driver's equipment. You will way after time trials and designated times during the night.
6. Bumpers and side nerf bars must be sprint car type bars and must be mounted securely to the chassis. Bars will be constructed of 1" steelwith .060 wall thickness. Front bumpers may be aluminum 1" .120 wall thickness. Side nerf bars must not extend outside of rear tires.

DRIVE TRAIN

1. All drive trains must have a driveline or rear coupler system. (to disengage rear end from engine) All drivelines must be enclosed and have nomore than one (1) u-joint and that must be at the front.
2. Standard torque tube and ball housing recommended, new style scattershield highly RECOMMENDED.
3. Torque tube safety strap or hoop manditory.
4. Buckley yokes allowed. BUT MUST HAVE NEW STYLE SCATTERSHIELD!!
5. Any conventional quick change rear end allowed, maximum 2" offset.

SUSPENSION

NOTE: NO FOUR CORNER COIL OVER ASPHALT WIDEBODY TYPE CARS ALLOWED!!!!!!

1. Conventional torsion bar suspension, coil over front with rear torsion bar allowed, front sway bar allowed.
2. NO rear panhard bars allowed, MUST USE JACOBS LADDER OR WATTS LINK!!
3.Outsie of right rear tire to center or rear end may not exceed 43".
4. No independent suspension allowed, straight front axle only, 54" maximum width kingpin to kingpin.
5. One shock per wheel, no cockpit adjustable shocks allowed.
6. NO COCKPIT ADJUSTABLE SUSPENSION DEVICES!!!

WHEELS & TIRES

NOTE: CARS MUST USE ALL HOOSIER TIRES TO BE ELIGBLE FOR CHAMPIONSHIP
NOTE: NCMA TIRE RULES MAY BE USED EXCEPT FOR THE RIGHT REAR

1. Wheels: Any aluminum or steel racing wheel is allowed with any offset. Bead locks nocks not required on wheels. (SIX PIN FRONT WHEELS HIGHLY RECOMMENDED)
2. Front tire size 11.0/25.0-15 Hoosier 2010 LF tire compound, 2030 RF tire compound.
3. Left rear tire sizes 25.0/13.0-15, 26.0/13.5-15, 27.0/13.0-15 Hoosier M-20 and M-2020 compound.
4. Right rear tire 17.0/28.0-15 Hoosier M-60 compound.
5. NO TIRE SOFTENING OR SIPING OF TIRES ALLOWED.

BRAKE SYSTEM

1. Steel, cast iron or aluminum rotors only. NO TITANIUM BRAKES ALLOWED!!
2. Minimum left front and inboard rear brake. (BRAKES ON ALL FOUR WHEELS HIGHLY RECOMMENED)
3. Brake porportioning adjusters allowed.

BODY/GENERAL APPEARANCE/AERODYNAMIC DEVICES

1. Body and chassis must be well maintained. OFFICIALS DISCRETION
2. Conventional sprint car hoods and body panels.
3. Numbers must be on both sides of tail tank and on nose of car. Numbers must be at least 14" tall. MUST BE EASILY READ FROM SCORES BOOTH. Transponders mandatory.
4. No aerodynamic devices allowed. NO wings, wedges, or modified belly pans. No body part may be designed to form a wind brake except those to cool or protect the engine, cooling system or to cool the brake system. OFFICIALS DISCRETION
5. Right or left side arm guards may not exceed above the bottom of the drivers helmet.
6. Drivers must be able to easily escape the car. Driver may be asked to demonstrate this capacity.
7. Firewall will be solid and fit between the engine and driver's compartment. Reasonable holes foe wiring, plumbing, and linkage is allowed. OFFICIALS DISCRETION
8. Floor pan must extend from the fire wall to the front of the driver's seat.

FUEL & FUEL SYSTEM

1. A securely mounted fuel cell with bladder is required. Sprint car type only.
2. Sprint car factory fuel cells & bladders mounted by factory specifications only. OFFICIALS DISCRETION!!
3. Minimum 25 gallon cell, maximum 40 gallon cell, 28 gallon cell recommended.
4. Fuel tank MUST have working vent check valve.
5. Fuel systems must have fuel shut off device within easy reach of the driver. A waterman shut-ff system is recommended for addional safety.
6. All fuel lines and filters will be securely and safely mounted to the satisfaction of the officials.
7 . Methanol racing fuel only. NO ADDITIVES. Including nitrous oxide or oxygenated additives.
8. Mechanical fuel pumps only. NO ELECTRIC FUEL PUMPS ALLOWED.

MUFFLERS

1. Mufflers mandatory at all times. 95 dba @ 100 ft. NO EXCEPTIONS OFFICIALS DECISION FINAL!!!!!

ENGINE

1. 360 C. I. Maximum. NO EXCEPTIONS
2. Rear of engine block may not exceed more than 43 inches ahead of the center of the rear axle.
3. Cast Iron blocks and headsonly. Stock 23 degree valve angle.
4. Flat tappet cams only NO Roller cams allowed! Roller rockers and stud girdles allowed.
5. Gear drive and dry sump oil system OK.
6. No titanium or aluminum rods, titanium valves & retainers allowed.
7. No onboard computers except tacs and exhaust analyzers.
8. Coolant catch can is required.

CARBURETOR

1. Holley #4412 or Demon #9647 Series 500 CFM 2 barrel carburetor. Track Go-on-Go gauge will monitor carburetors. 1 11/16" throttle bore.
2. Choke tower may be removed. External jets allowed.
3. Venturi may be opened .010 over catolog specifications.
4. Bottom of carburetor may be more than four (4) inches from the topof the manifold.
5. Aluminum 4 barrel intake manifold allowed. NO RAM INTAKES ALLOWED
6. Throttle pedal must have a toe strap and at least three return springs.

IGNITION & STARTING

1. HEI ignition system or magneto allowed. Cars must have a clearly marked ON/OFF switch within easy reach of the driver and visable for the rescue workers.
2. Must have battery on board, recommended location under seat securely fastened.
3. If battery is wet type, not a sealed gel battery like a Optima battery, it must be well covered.
4. Cars must have on board working starters. NO REMOTE REMOVABLE STARTERS ALLOWED!!!!!
5. Steel or aluminum shield that covers the flywheel is mandatory when bell housing is in the cockpit.
6. Cars must start each event from the staging area WITHOUT ASSISTANCE. Cars requiring assistance will go to the back of the field.
7. Cars may be push started for red flag stops and from the work area under yellow flag's without penalty.

SAFETY

1. High back aluminum sprint car style racing seats only.
2. Right side safety net required unless car has full containment seat.
3. Headrest's must have high impact energy absorbing padding.
4. Seat must be mounted a minimum of four (4) places to the chassis with a minimum 3/8 grade 8 bolts & locking nuts, with 2" washers. Or use seat manufactures mounting hardware and location.
5. Seat belts must be no more than two (2) years old and must be a 5 point mounting system with minimum three (3 ") inch belts.
6.Quick release sterring wheel mandatory.
7. Full face Snell SA2000 or helmets are required.
8. Arm restraints are mandatory.
9. Head socks or skirts mandatory.
10. Neck Collars or HANS type device required.
11. Fire proof uniforms, gloves, and shoes are mandatory. SF13.2N1 or rating minimum.
12.NO RADIO COMMUNICATION ALLOWED!!!