358 MODIFIEDS
Disregard rules in the 2011 rule book and use following guidelines for the Sept 17 Race:
358 Modifieds Open Tire 13x92 No Sail Panels; Dirt Legal Spec Motor WT 2350 650 Carb; Dirt Legal Motor with chip WT 2400 650 CFM Carb; Open Motor Max 361 CI 650; CFM Carb WT 2450

E-MODS:
ROLL CAGE: Minimum tubing thickness .095”. Minimum outside diameter 1.5” Must be 4 post design with rear upright loop supported with tubing running down to the rear of car. Top hoop must have 1 crossbar preferably running from right rear to left front. Absolutely no crossbar above driver’s head
All support bars forward of roll cage must be lower than stock hood height. Door bars must be .083”minimum thickness. 3 bars minimum, 4 suggested. Door bars must be welded to roll cage-front and rear and be parallel to frame.

BRAKES: Must operate at all times on all 4 wheels. Calipers must be OEM steel only.

EXHAUST SYSTEM: Headers may dump out side of engine or rear of engine and must not point directly to the ground. Mufflers must be run, securely attached, and easily detectable.

FUEL CELL: 32-gallon maximum capacity - Completely enclosed in a steel enclosure. Fuel cell must be protected in rear by roll cage tubing. Cell may not be lower than protective tubing.
Top siphon fuel cells only. Tech inspectors can reject any fuel cell mounting they deem unsafe.

BATTERY: Must be mounted securely and fastened across the top.

FUEL: Either racing gasoline or methanol-no nitrous oxide or power additives.

WEIGHT: No weights added in driver compartment or outside of body. Weight must be painted white and have car # on it. Weight must be fastened with 2-1/2” bolts minimum. Weight may not be attached to rear bumper. All cars must weight 2400 track scale pounds with the driver after the race at speedway scales.

FRAMES: OEM production full 1960 or newer parallel American passenger car frames only. Frame may be cut not farther forward than 36” from center of rear end housing. Frame must be full and complete on both sides and not narrowed or widened. Frame must be able to support roll cage.

FRONT SUSPENSION: Must be in stock location. Stock passenger car spindles only. No tubular or fabricated spindles allowed. Tubular type upper and lower A-frames permitted. Upper A-frames may be moved and have aluminum cross shafts. Coil springs minimum 4-1/2” diameter only (no coil overs) and must be mounted in stock position. No coil-over eliminators may be used. (Mono balls will be accepted.)

STEERING: Must be OEM type. Front steer type frames must have steering box mounted on left frame rail ahead of front cross member. Rear steer frames must have steering box mounted behind crossmember on left frame rail. Power steering with a steering quickener is permitted. No rack and pinion steering. Stock type OEM steering boxes only.

SHOCKS: Steel only- 1 shock per wheel and no hydraulic, ratchet or electric weight jacks anywhere on car. No externally adjustable shocks.

WHEELBASE: Minimum 108”, maximum 112”.

REAR END: Any passenger car or truck type rear end permitted. Rear end must be locked, must be mini spool or welded spiders only. Quick change allowed with steel tubes and must be 5 x 5 bolt pattern.

REAR SUSPENSION: May be coil spring (minimum 4-1/2”) diameter or steel leaf springs. Coil-over eliminators or steel/aluminum coil-over kits may be used with coil springs. Lowering blocks (aluminum or steel) may be used with leaf springs. No aluminum birdcages, brake floaters, trailing arms or trailing arm mounts allowed. Panhard bar and bracket must be steel.

DRIVESHAFT: Must have a protection loop completely around. Loop must be .25” thick x 2” wide steel minimum and mounted no more than 6” back from U-joint in driveshaft. Drive shaft must be steel or carbon fiber only.

TRANSMISSION: Must have forward and reverse gears and be able to shift to forward or reverse with engine running. Bert and Brinn type transmissions are permitted (no direct drives). Stock clutch type transmissions must have scattershield or blow proof bell housing. Automatics must be stock OEM cases and bell housings.

ENGINES: Must be able to be used in conventional passenger car without alteration. No machine work on outside of engine. No dry sump oil systems (racing type wet sump oil pans permitted). One four barrel carburetor naturally aspirated, no fuel injection, no electric fuel pumps, no magnetos. Rear of engine must be at least 72” forward from the center line of rear axle. No more than 2” engine offset. Minimum height 11” from center of crank to ground, no aluminum blocks.

RADIATORS: May be aluminum, steel, or brass and must fit under hood line and be located in front of engine fan.

BODIES: Must resemble American compact passenger cars only (Daytona, Cavalier, Pinto, Probe, Mustang II, T-Bird, Monte Carlo, Gran Prix, Cutlass, etc.). Bodies must have front and rear windows open, steel screen and/or bars are mandatory in front of driver. Original roof line should be maintained with a maximum 1” drop rear to front. No wings, or other ground effects allowed inside or outside of car except an 8” spoiler. Body must have a minimum of 4” ground clearance. Engine compartment will remain open with no side panels. Hood sides may have a maximum 4” drop and be enclosed at rear of hood. Rear of bodies may have a solid panel at least 8” high with car number. Side windows must have a minimum vertical opening of 12” front to back. Nose piece no lower or wider than frame horns and no further back than radiator. See attached diagrams for all measurements. Firewalls and floor boards are mandatory. Handmade body parts may be constructed of steel, aluminum, or fiberglass, but should be recognizable as a factory production vehicle.

KILL SWITCH: A battery disconnect switch is required. This should be mounted within easy reach of the driver and the safety crew.

FRONT BUMPER: Must be mounted to end of frame, with bottom loop parallel to the ground. Minimum 1-1/2” tubing must be used. Rear bumper may be tubing or square stock and must protect fuel cell. Center of bumpers must be at least 18” from ground. No sharp edges.

NERF BARS: Must be inside of line from rear tire to front tire with no sharp edges. There is no tolerance.

GAUGES: Oil pressure, oil temp., water temp., fuel pressure, brake bias pressure, volt or amp gauge and a tachometer are the gauges permitted. No digital dash panel. No lap timers or any other type of electronic gadgets permitted. No electronic traction control. No adjustable engine timing controls of any kind. No engine retarding devices allowed. No controlling of wheel spin by any device. No back up or dual ignition allowed.

STEERING WHEEL: All cars must be equipped with a removable steering wheel.

WHEELS: Any 8” steel production racing wheel may be used. Beadlock wheels may be used.

TIRES: Any 8-inch American Racer, Hoosier or Goodyear permitted. No softening of tires allowed. Grooving and siping allowed. No re-caps allowed

MISCELLANEOUS: One-Way Radios Required.


SPOILERS:

1. Can be a maximum of 8 inches clear material. A maximum one inch flange can be used at the top of the spoiler for added strength. This flange does not count as part of the 8 inches clear material allowed. Spoilers cannot be wider than the car.
2. Front and rear roof edges must remain flat. No bending for spoiler effect.
3. Side panels from roof to rear deck can have a maximum one inch flange for added strength.
4. Drivers side window and passenger side window must remain open except for support angles in roof pillar openings. Support angles cannot extend past the front roof line. Roof pillars must be in place. Window net required in drivers window.
5. No traction control of any kind – mechanical or electronic allowed. Only one ignition box allowed and it must be located in engine compartment. All wiring from distributor/magneto to ignition box or tachometer must be in plain view for inspection and have no splices or interruption in these wires. Speedway will have the right to confiscate any part of the ignition system for further inspection. If parts are confiscated, prize money and points will be held until results of inspection are known. All legal parts will be returned within 5 days. Violation of any of these rules will result in disqualification.

RADIO:

1. One-Way Radios Required.

CAUTION RULE: Any driver/car who causes two cautions in any one race will be disqualified for the remainder of that event.

TIME LIMIT: Each Heat or Consi will have a 10 minute time limit commencing from the first green flag of the event. Each Feature will have a 30 minute time limit. In the event the time limit is reached and the race is under green flag conditions, the leader of the next lap will be given the checkered flag. In the event the time limit is reached under yellow or red flag conditions, the leader of the race at that time will be declared the winner.

 

If a topic is not covered in this rulebook, do not assume your car is legal.
Call one of the following for clarification:

• Little Valley Speedway Office at 716-938-9146
• Wayne Reed (Pit Steward) at 716-257-9573