|
|
|
Hobby
Stock
BODY: Cars
must be a stock street type. American made passenger cars only. Metric frame, (
WEIGHT: Minimum weight is 3200 pounds with driver after race.
CARBURETOR: Rochester
Quadrajet,
Edelbrock Quadrajet or Holley #4412 two barrel is allowed. Number must be
legible on air horn. Choke horn must be attached. Circle track floats may be
used. No machine work on carburetor. Holley carburetors may be mounted on cast
iron 4 barrel intake with an adaptor only. No spacers are allowed. No other
alterations are allowed. Only one carburetor allowed on engine. No other
carburetors are allowed. No spacer or adapter allowed. No injectors or pressure
systems allowed.
Ford: Motorcraft two or four barrel, Holley #4412, or #0-80583-1 two barrels.
CYLINDER HEADS: OEM cylinder heads only with a Minimum 68cc chamber size. No closed chamber heads except 305 heads on 305 engine only. No partially closed chamber heads. No 461 or 462 heads. Open chamber heads only. No Vortec heads. Racecars using GM engines must run 350 heads on 350 engines, and 305 heads on 305 engines. No aluminum heads, no special order heads or factory special order heads. Any open chamber cast iron steel OEM factory production straight plug head is allowed that meets the described requirements. All GM heads are limited to 1.94” intake valves and 1.50” exhaust valves. Heads may be flat milled for surfacing reasons only, no angle milling allowed. Studs may be pinned or screwed in. Push rod guide plates are not allowed. Any single valve spring with dampener is legal, no double or triple springs allowed. No porting, polishing, port matching or coatings of any type allowed. No aluminum or titanium components are allowed. Any work done in the bowl area must be done with a 360 degree cut, with the valve guide as the center point. Full roller rocker arms and roller tip rocker arms are not allowed. Poly-locks are allowed. Stud girdles are not allowed. ENGINE: Compression
rule : 180 lbs per cylinder with 5 bumps of guage May be in stock location or #1 spark plug can be even with ball-joint or forward. #1 spark plug may not extend behind upper ball joint on any car. Cast iron OEM blocks only. After-market steel stock type engine mounts are allowed. No machining in lifter valley (except for oil flow drain openings) or in lifter bores. Engine components must be stock. No Chevrolet Bowtie, Ford SVO or Mopar Performance blocks. Stock stroke must be maintained within .002”. No performance parts. Stock OEM rods only. After-market rod bolts may be used. Only cast OEM replacement-style pistons with four (4) equal valve relief are allowed. No floating wrist pins, must be press fit. Flat top pistons or dish pistons only, no domed pistons. No forged pistons, cast only. No total seal type rings are allowed. Maximum cubic inch displacement allowed is 364 c.i.d. Boring to a maximum of .060” over stock OEM bore is allowed. Fords:
289,302, or 351 blocks only with Flat Top pistons. Any OEM Ford head is allowed.
No aftermarket or Boss heads allowed. Maximum valve size is 1.94 intake and 1.60
exhaust. Only
273, 318, 340 and 360 blocks can be used for Mopar. No big blocks. OEM only. No
hemis. Camshaft
and lifters must be hydraulic with a maximum of 450 lift. Measured at the valve.
Tech Clarification: In order to maintain a 450 lift on your camshaft you
must not exceed a camshaft lobe of 280 degrees with 1.6 rocker arms, which will
measure a 450 lift. Also, a 450 Lift Stock style rockers arms only, no full rollers, and no roller tips. No stud girdles. A stock oil pan or a claimer style oil pan is allowed. Oiling must be complete wet sump. No dry sump systems allowed. Intake must be cast iron. No high-rise intakes, no marine intakes and no aluminum intakes. No porting, polishing, port matching, acid porting, acid treatments or coatings of any kind. Most brand, style or size air cleaner are allowed, but no type of ram air or forced air induction will be allowed. Any valve cover combination is allowed. Cast iron water pump is required. Pulleys may be aluminum after-market. Fan must be steel and attached to water pump. Fan spacers may be used. An additional electric cooling fan may be used to assist cooling under yellow flag periods, but all stock fan, pulley and belt components must remain installed. After-market harmonic balancer is allowed. IGNITION: Ignition
must remain under stock OEM cap. Stock HEI ignition is allowed. No MSD systems
or any after-market or GM ignition boxes allowed. No external coils.
EXHAUST SYSTEM: Under
chassis headers 1 5/8 tube and three inch collector , allowed no 180
degree, shorty or mini headers. Stock cast iron exhaust manifolds allowed. No
porting, polishing, acid treatment or coatings. No Corvette-style (2.5”
port exhaust) stock exhaust manifolds.
RADIATOR: Only
one radiator must be in stock location. No cutting of hood for clearance.
FUEL: Gasoline only. Racing fuel allowed. No additives allowed. No alcohol.
FUEL PUMP: Must be stock OEM style fuel pump. Carter and Holley manual styles are allowed.
FUEL CELL: Must be securely mounted to frame in trunk of car between the rear frame rails. Fuel Cell in a Steel Can is required if cell is dropped down between frame rails. A Plastic Fuel Cell may be used only if complete floor pan is in place. Fuel cell is required, maximum capacity of 22 gallons.
DRIVE TRAIN - TRANSMISSION: Any OEM automatic transmission is allowed. Unit must be stock and have a full working torque converter, minimum of 10". Powerglides must have 12” torque converter. No direct drives, valved pumps or bleeder style valve bodies. All forward, neutral and reverse gears must be in working order for all automatics except Powerglides. Powerglides are allowed to have either one or both forward gears, with neutral and reverse in working order. Standard transmissions must be OEM stock, with all gears in working order and a minimum of 10.5” clutch, pressure plate and full size stock flywheel. No mini-clutches or direct drives. Standard transmissions may not use aluminum flywheel of any size. All standard transmissions must have bell housing made of 1/4” thick steel and must cover 180 degrees over the sides and top of the clutch assembly (also referred to as a blow-proof bell housing).
No 4-speed, 5-speed or 6-speed manual transmissions, no overdrive transmissions or overdrive units. No Bert, Brinn or internal clutch style transmissions allowed. No ram couplers allowed. Quick-change transmissions or transmission adapters for gear change are not allowed. Car must be self-starting and have working neutral, reverse and ALL forward gears. (ex. 3-speed trans. must have 3 forward working gears.
Transmission fluid coolers are allowed, but may not be mounted exposed in drivers compartment. DRIVE SHAFT: Drive shaft must be steel and must be painted white or silver. Drive shaft must have a steel drive shaft loop (360 degrees) connected to the frame located within 6” of the front drive shaft u-joint. Minimum size of drive shaft loop is 2” x 1/4” or minimum 1” round tubing. No chain loops are allowed as drive shaft loops.
REAR END: Rear-end
must be OEM stock for year, make and model. Any gear ratio allowed as long as no
altering of housing is required to allow for installation. 8.5
Rear-end may replace 7.5
Must
use stock OEM, for frame being used, length upper and lower control arms.
Axles
must be locked together at all times with mini-spool or welded. No posi-trac,
limited slip,
BRAKES: Racing brake pedal and single racing master cylinder are allowed. No aluminum brake components on any car. Cars must have a minimum of three (3) functioning brakes. If four brakes are installed, a cut-off valve may be used on one of the brakes. Adjustable proportioning valves are not allowed. If using three brakes, the fourth brake components need not be present other than rotor, which you can remove outer portion. Rear Disc brakes are allowed with steel components only and with only a single piston caliper.
STEERING: Quick steer boxes of any type or style allowed. Complete OEM stock steering system for year, make and model, from the steering box to the spindles, including steering gear box must be used. After-market steering shaft and quick release steering wheel is allowed. Steering wheel spacer allowed to a maximum of 3”thick.
SUSPENSION: No modifying of the suspension is allowed. OEM suspension parts only. No cutting, welding or bending of frame to accommodate suspension changes. Suspension parts must remain absolutely stock for that year, make and model of car. This includes spindles, rotors, upper control arms, lower control arms, ball joints, tie rods, tie rod sleeves, center link, pitman arm, idler arm, steering box and trailing arms. No adjustable spring spacers. All upper/lower trailing arm & upper/lower control arm bushings must be present; however they may be replaced with after-market bushings. No mono-ball bushings. Bolt on Spindle Savers are allowed. Upper Control Arm can be strengthened with a maximum of 3/8 inch cold roll or rebar along the outer lip within the groove.
SPRINGS: Racing springs may be used. No adjustable spring spacers are allowed. Leaf springs may be after market, but no adjustable lowering blocks. Any steel non-jack bolt type leaf spring shackles are allowed, including multi-hole.
SHOCKS: Shocks must be steel OEM replacement shocks. Shocks must be mounted using the OEM stock mounts in the factory installed location. No heims on shocks allowed. No shock adapters.
CHASSIS: Frame must remain unaltered in wheelbase and width as defined by OEM original specifications. 1978-1987 metric chassis may be altered for clearance of right front tire only, with maximum alteration not to exceed one-half inch (.5”). Uni-body sub-frames may be tied together.
ROLL CAGE: Roll
bars must be constructed of 1.5” x .095” steel tubing minimum.
NERF BARS: A single nerf bar is allowed on each side. Maximum size 1.5” x .095”. May be attached to main cage only at the front and rear section of the nerf bar. This means only two (2) attachment points are allowed. No open tubing allowed. Tubing must be capped or rounded with no sharp edges. No nerf bars are allowed on the rear outside quarter panel area. Nerf bars may not extend outside of tires.
WINDSHIELD BARS: A minimum of three vertical windshield bars are required. Must be a minimum of 3/8” diameter steel and mounted in front of the driver. TIRES: 60 SERIES D.O.T. Radial Tires only, must be able to have road hazard. Grooved and siped tires are allowed. No softening of tires. Asphalt
pulloffs will also be allowed with a durometer reading of noless than 50 after
the races
but may be cold checked before races with a reading of 63. WHEELS: Any 8” width steel wheel. Any offset from 2” through 5” is allowed. After-market 5/8” lug studs are recommended. 1” diameter lug nuts are required. Wheel spacers are not allowed with stock studs. Wheel adapters are not allowed. No screws allowed. A protective outer ring is allowed to be welded to the outer lip of the wheel with a maximum size .5” O.D., round or square is allowed. A flat bar of 1.25” may also be used. Bead lock placed on right rear only.
INTERIOR: Any oil or transmission fluid coolers in the driver’s compartment must be configured to shield the driver in case of leaks. The cooler lines must be encased in tubing, rubber or steel may be used.
BODY: Car bodies must be strictly OEM stock and must remain in stock location. Body must be stock for make of frame. No cutting on body. Complete bumper-to-bumper steel body must be retained. Doors must be welded or bolted shut. Doors may be gutted for cage installation. All glass, plastic, fiberglass and trim must be removed from racecar. Upholstery and plastic portion of the dash must be completely removed.. (See Floor for Exception)A-Posts may be trimmed and cleaned up to allow for engine set back, but must be reinforced. Window Post may not be removed.
FENDERS: Fenders may be cut for tire clearance only and fender must be within 7” of the tire. Front inside fender wells must be removed.
FIREWALL: A full and complete front and rear firewall must be retained. All holes must be sealed with a minimum or 20 gauge steel.
FLOOR: Floorboards
must remain in car. All rusted portions of the floorboard must be replaced with
minimum 20 gauge steel. Floor Pan must remain stock from driver / passenger
seat forward; therefore you may remove the floor pan behind the
driver/passenger. However a rear firewall will be mandatory behind the
driver/passenger area to ensure the safety of driver.
BUMPERS: Stock OEM bumpers are required. Option: After-market plastic bumpers may replace stock OEM bumber. A maximum of 2 in. x 3 in. rectangular tubing or 1 ľ in. round tubing should be used to support plastic bumper. Bumper loops are required to protect radiator, fuel tank and to be used by wrecker for tow hooks. Maximum 1.5” x .095” steel tubing, maximum 8” tall and not wider than the frame and mounted to the frame or bumper only.
HOOD: Steel Hood/Trunk Required, No Aluminum. Hood may not be hulled and must remain in place at all times. Hood must be pinned. No holes allowed in the hood: therefore no working hood scoops. Any holes in hood must be covered by steel. Quick release hood pins and rear deck pins are required. Hood must make a complete seal dashboard and/or firewall. The engine compartment must not be visible from driver’s seat.
SPOILER: Not to exceed 6” and must be attached to rear of trunk lid only. May not extend past the width of the car and may not have side-boards or Spoiler supports may not be taller than spoiler and may not be longer than 12 inches. Spoiler may be made of aluminum, steel, or Lexan.
IGNITION SWITCH: All cars must have ignition switch clearly labeled. The car must be equipped with a kill switch to be located within reach when standing outside of the car and easily accessible to emergency personnel. Only
one twelve volt (12v) battery allowed.
DRIVER LOCATION: Driver must be located in the original OEM seat location on the left side of the vehicle only. No back seat mounting of driver’s seat.
SEAT: Racing seats with rib supports are required. No fiberglass or bucket seats. (2007 Update) Seat must be securely mounted to chassis (not floor plan) with a minimum of 4 (four) 3/8” bolts, of which two must be mounted in the middle of the seat at the drivers back.
SAFETY HARNESS: Racing-type 5-point seatbelts are mandatory. All 5 belts must be fastened while driver is in car and on racing surface. Must be securely mounted with half inch bolts and tabs welded to the cage or frame. Must be less than five (5) years old. If the SFI tag is not present or is illegible, the belts will be deemed illegal.
WINDOW NET: A window net with quick release is required. It may be Mesh or Ribbon Type. No Sprint Car Nets.
SCORING:Numbers must be 24” high and 4” wide on both sides of the car, and 28” tall on the roof and positioned so it can be read from the passenger side. Cars must be painted and numbered neatly and to be seen easily by the scorekeepers. The number on the roof is the most important number. Reflective vinyl is NOT recommended for roof application due to the poor readability. When positioning the number on the roof it should be readable from the passenger door.
HELMET:
Helmets
must be full face Snell 90 or newer and must have Snell sticker clearly visible
inside the helmet. Snell ratings of M90, M95, M00, SA90, SA95, and SA00 are
legal. If the Snell rating tag is not visible or legible, then the helmet is not
approved for racing at 105
|