General Rules for 2006
Required Safety Items For all Classes
Five point safety belts, sub belt, shoulder harness quick
release type required. Belts must be mounted to roll cage, frame, or reinforced
floor. Belts are recommended to be no more than 2 years old.
Helmet must be Snell SA90, SA95, or SA2000 with eye
protection.
Fire suit, neck brace, and racing gloves required.
Window nets.
Fire extinguisher - mounted within driver’s reach.
Master kill switch shall be clearly marked.
No two way radios or communications of any kind.
Drive shaft loop.
Engine Claim
Street & Factory Stock: $625 plus exchange; Modified: $1000 plus exchange
Cash claim on engine with exchange, $25 of this goes to the
wrecker for pulling engine. Claim does not include the flywheel, clutch,
pressure plate, bell housing, carburetor, headers, starter, motor mounts,
sending units, switches for oil pressure and water temperature, carburetor
adapter, fan and pulleys, clutch ball, clutch arm, throw-out bearings, dip
stick, water pump, fuel pump, distributor, and plug wires.
Top four finishers in every race must report to inspection
area and are subject to claim in the A feature by any driver finishing fifth of
farther back. Any driver lapped by fourth place car is not eligible to claim.
Driver allowed only one claim per event. In case of multiple claims on same
engine, engine will go to qualified claiming driver by draw. Driver making claim
must drive his car immediately after finish of feature to the claiming area
under its own power. Driver is only eligible for motor claim if finished the
race without being disqualified.
Only drivers, track officials, or other persons designated by
a track official are allowed in the claiming area.
Claims must be made within five minutes of the end of the
feature race and claimed engine must be removed within one hour from time claim
is made and driver agrees to sell claimed engine. Claims must be official,
accompanied by the correct amount of cash in order to claim. Only driver may
claim engine and only driver may agree to sell or refuse to sell. First sell or
no sell by driver being claimed is binding. Refusal to sell forfeits all cash
and contingency winnings for feature, trophies earned in feature, and all points
for the night. Any driver refusing to sell engine when claimed within rules,
loses his or her right to claim any driver’s engine for twelve calendar months
from date of refusal to sell.
First refusal to sell will result in loss of points for the
night and will also result in driver being fines $25, which goes to the points
fund. Second refusal to sell will result in driver being suspended from events
for fourteen calendar days from date of refusal and a $50 fine, which goes to
the points fund. Any driver found to be claiming an engine for other than
himself will lose all points for the season and will be suspended for thirty
calendar days.
All claimed engines must be removed from car at the track.
Buyer must examine before removal. Once removal is started, the sale is final.
The cylinder block may not be altered in such a way as to prevent it from being
used in stock application. Stock OEM components must be able to be immediately
used in their stock location. Drivers are to be held accountable for any
sabotage discovered while pulling the engine, and will be responsible for any
and all penalties as a result of any sabotage. Any sabotage discovered to
claimed engine will result in driver being suspended from competition for thirty
calendar days. The claim will be disallowed and the money returned to the
claimer. No driver may claim more than four engines during the current calendar
year. No driver may claim unless he or she has competed at the track the
previous race night.
No one driver may claim any other driver’s engine more than
once during current calendar year.
A-Modified Class
Modified should closely follow IMCA type modified rules with the following
exceptions:
-Track tire is the IMCA G60-15.
-No weight rule.
-Bert/Brinn type transmissions allowed.
1. ROLL CAGES Must consist of continuous hoops not less than 1.666-inch
outside diameter with a wall thickness of at least .095-inch. Low carbon, mild
steel tubing is recommended. Must be frame-mounted in at least six places. No
brazing or soldering allowed. Must consist of a configuration of front and rear
hoops connected by tubing on the sides or side hoops. Driver’s head must not
protrude outside cage with helmet on and strapped in driver’s seat. Must have
minimum of one cross bar in top halo of roll cage. Roll cage must be securely
supported and braced. Protection of feet is mandatory. Bar across back of engine
with vertical bars and rub rails, or similar protection. No brace bars forward
of cage may be higher than stock hood height. Main cage no further forward than
engine plate.
2. DOOR BARS A minimum of three driver side door bars, at least 1.5-inch
O.D., must be as parallel with the ground as possible, and located perpendicular
to the driver so as to provide maximum protection for driver, but without
causing undue difficulty in getting into or out of vehicle. The sidebars must be
welded to the front and rear of the roll cage members. Must have at least one
cross door bar, minimum 1.25-inch O.D., on passenger side of car, either
horizontal or angled. Steel door plates, 18 gauge or .049-inch minimum thickness
steel, must be securely welded to outside of door bars on driver’s side. Plate
must cover the area from the top door bar to the bottom door bar and from the
rear down post to five inches in front of the seat. Must be visible for
inspection.
3. ELECTRONICS No transmitting or listening devices. No electronic
monitoring computer devices capable of storing or transmitting information
except tachometers. No digital gauges, timing retard controls or oxygen sensors
allowed. One 12-volt non-adjustable ignition box and coil allowed - must be out
of driver’s reach. No additional ignition accessories allowed. The only change
that can be made with ignition box is rev-limiter setting, and only one high-end
setting is allowed. This setting can be changed through one chip, or an internal
setting inside the box. No electronic traction control devices allowed, penalty
is a one-year suspension and a $10,000 fine.
4. EXHAUST Exhaust system must be mounted in such a way as to direct
spent gasses away from cockpit of vehicle and away from areas of possible fuel
spillage.
5. FUEL SYSTEM Racing fuel cells required and must be mounted by at least
two solid steel straps, two inches wide around cell. Fuel cells must be enclosed
in steel container and must be mounted securely behind rear axle and between the
rear tires, no lower than six inches off the ground, protected by roll-cage
tubing. Protective tubing must cover the rear and extend past both sides of fuel
cell. Fuel cell must be a minimum of four inches ahead of rear bumper and no
part of fuel cell shall be lower than protective tubing. Fuel cell vents,
including cap vent, must have check valves, and bladders are highly recommended.
Fuel cells are limited to 32-gallon maximum capacity. Pick-up must not be
underneath fuel cell. A limit of one standard fuel filter allowed between the
fuel cell and carburetor.
6. FUEL May be either gasoline or alcohol. NO Nitrous Oxide. One 2- or
one 4-barrel carburetor allowed; must be naturally aspirated. NO fuel injection.
NO electric fuel pumps.
7. BATTERIES One 12-volt battery only, must be securely mounted and
shielded. All vehicles must have the capability of starting without being pushed
or pulled. Track officials may allow cars that are temporarily unable to start
without being pushed to start a race in their earned position. This decision
however would be for one week only. That car will be required to be fixed by the
following week.
8. WEIGHT Any weights added to other areas of vehicles must be securely
mounted with at least two half-inch bolts, painted white and have the car number
on it. No titanium, magnesium or carbon fiber products, parts or components
allowed. No gun-drilled, tubular or hollow bolts or studs.
9. TIES AND WHEELS IMCA G60-15 tires mandatory. You may sipe or groove
tires. All wheels must have an
‘I.M.C.A. approved’ wheel prior to use as a bead lock wheel. External, steel
bead lock only and it cannot make the wheel any narrower than 8 inches and no
wider than 8.75 inches. Must use only steel bolts. One foam type or plastic mud
cap allowed on right rear only. Rim-mounted bleeder valves are allowed.
10. FRAMES No part of racecar can be lower than four inches from the
ground (exception is front cross member and oil pan). Factory production
complete full 1960 or newer parallel American passenger car frames only. Frames
may be cut in rear only at point not further than 36 inches from center or rear
end housing. No front clips or tube type allowed. Maximum two inch wide by
four-inch tall frame stiffener may be welded directly to outside of frame rail.
Frames may not be widened or narrowed and must be able to support roll cage on
both sides. Must be full and complete both sides. Front cross member must remain
full and intact, center of cross member may be notched and boxed for radiator
and/or steering clearance only. No Jeep, Bronco, (etc.) or four-wheel drive
frames allowed. No sports car frames allowed. No front wheel drive allowed.
Minimum wheelbase, 108 inches, both sides. Maximum overall width (front or rear)
shall not exceed 78 inches from outside of tire to outside of tire.
11. SUSPENSION AND STEERING Front suspension and steering must be
unaltered approved OEM and be in stock location, and must be replaceable by
stock parts. Outer tie rod end and adjustment sleeve may be replaced by a
minimum .625-inch rod end and steel tube. Weight jack must be in original
centerline of spring. Stock passenger car spindles only; no fabricated spindles.
Spindles can be ground for brake caliper clearance only. Bottom A-frames cannot
be altered or moved (exception: can weld shock mount on A-frame). No offset or
bearing type lower control arm bushings. Tube-type upper A-frames allowed and
can be moved. Front sway bar must be approved OEM. Suspension, steering, and
rear end parts must be steel. Steering box must be steel approved OEM and must
remain within original bolt pattern for type of frame used. No rack & pinion
allowed. Steel steering shafts and knuckles only. In-cockpit steering may be
modified to suit driver’s taste, but must be kept on left side of cockpit. No
center steering allowed. No coil over shocks allowed either front or rear. No
homemade coil overs used anywhere on racecar. Rear of frame may be altered to
accept leaf or coil springs; any coil spring must be at least 4.5 inches outside
diameter. One steel coil spring per wheel only. No torsion bars allowed in rear.
Progressive springs allowed only on pull or left bar. No devices allowed that
would enable driver adjustment to alter wheelbase or for weight jacking while
car is in competition. No adjustable shocks. No covers on suspension parts
except clear cover on slider and a shield to protect the shocks. This shield can
cover no more than the front half of the shocks. No Schrader valves allowed.
12. BRAKES Must have a working caliper and rotor on each wheel and must
lock up all four wheels. No brake shut-off or pressure sensitive devices
allowed. One proportioning device allowed, front to rear only. Brake lines must
be outside frame rails and visible. Vented rotors only, no scalloped rotors.
Rotors cannot be lightened. Rotors may be re-drilled for different bolt pattern
or larger studs. Must be steel, approved OEM calipers.
13. BODIES 1970 or newer American compact passenger car only, no panel
vans or station wagons. Stock appearing front windshield and rear window support
unit, painted roll bars not acceptable substitute. May utilize a flat
half-windshield, with no wings, mounted to the roll cage. Mirrors not allowed.
Must have a minimum of three windshield bars in front of driver. Cowl panel in
front of driver can be no wider than cockpit and no farther back than the
steering wheel. Firewall is mandatory. Minimum .125-inch aluminum, or 16 gauge
or .060-inch steel, complete floor required. All body parts should be
recognizable as factory production vehicle. Fiberglass or metal duplicates of
body parts ore permitted. Handmade body parts may be constructed of steel,
aluminum, or fiberglass, but should be recognizable as factory production
vehicle. All cars in competition must have a complete paint job, no reflective
doors or quarter panels. No plastic body parts allowed. Body must be the same
width, front to rear, and parallel to the frame. Original roof line of vehicle
must be maintained. Must be fiberglass full size roof. No wings, spoilers or any
other ground effects are allowed anywhere outside or inside car. Sail panels
must closely resemble examples shown on body diagram and be the same on both
sides of car. Reinforcing lips on rear of sail panels must be 180 degree bends.
Cars must be numbered with large legible numbers on both sides, on top and rear
panel. Numbers on sides and top of car must be in contrasting color from body,
be at least four inches thick and at least 20 inches high. Recommended that no
holographic or reflective numbers be used. Sponsors’ names must not interfere
with car numbers and must be neatly lettered. Engine compartment will remain
open, no side panels; hood sides may have maximum four-inch drop and must be
enclosed at rear of hood; maximum hood scoop height - six inches. Passenger side
of body must be no further forward than rear of block. Rear of bodies to be
solid panel at least eight inches high and include car number. No panel in front
of right door to engine compartment. No inner panels. No car covers. Driver and
passenger side windows must have at least 12-inch opening, measured at center of
window, between the lowest point at the top of window, whether the roof or roll
cage, and the highest point at the bottom of window, whether the interior or
body.
14. BUMPERS Center of bumper, front and rear, must be 18 inches, plus or
minus two inches, from ground.
(A) Steel bumpers must be used both front and rear at all times and securely
mounted with minimum .375-inch bolts. Must be made of minimum 1.25-inch OD
tubing, .065 wall thickness on front - .095 wall thickness on rear, and must be
able to support car if lifted by wrecker. Two-bar front bumpers must be mounted
frame end-to-frame end, no wider than the width of material outside frame horns,
with the bottom loop parallel to the ground. Top bar must be directly above
bottom bar, minimum 6.5 inches apart, measured center to center at front of
bumper (see P in body diagram), so bumper is perpendicular to ground.
(B) Rear bumper, steel nerf bars and bodies must not extend beyond width of
tires, and must not contain any sharp edges. Rear bumper no more than two inches
wider than body on each side.
(C) Rear bumper must resemble one of three configurations, see diagram on page
four.
15. REAR END Any approved OEM passenger car type or truck rear end may be
used.
(A) No aluminum allowed, except lowering blocks, axle cap, and drive flange. A
one-inch inspection hole in center section is recommended. Full steel spool,
steel mini spool or welded rear ends only. Steel axles only.
(B) No quick changes allowed. No cambered rear ends, one piece drive flange
only. No electronic or mechanical traction control devices allowed.
16. ENGINES No aluminum heads, blocks or oil pans. No Magnetos.
(A) Any American make engine may be used as long as rear of engine (bell housing
flange) is mounted at least 72 inches forward from the center line of rear axle.
Engine offset must be kept within two inches of centerline of front cross member
with engine level. 11 inch engine height minimum from ground to front center of
crankshaft.
(B) All engines used in competition must be able to be used in conventional
passenger car without alterations. Motor mounts cannot be removed or altered.
Castings and fittings must not be changed. No machine work on outside engine.
(C) “Wet” oiling system only. External oil pumps will go with engine if claimed.
Oil coolers must not protrude above interior. Accumulators cannot be mounted
between driver and left-side door.
(D) Cooling system may be modified. Any overflow tubes must be directed to the
ground, between frame rails. Radiators to be mounted in front of engine only.
(E) Conventional air cleaner housings only. No top flow air cleaner housings
allowed.
Street Stock Class
Any U.S. manufactured passenger car 1965 or newer. No trucks, convertibles, four
wheel drive, or front wheel drive vehicles allowed. Minimum wheelbase of 108
inches. Bodies must match frame. Mirrors must be removed and no window opening
can be covered or enclosed, except windshield bars or screen. All cars must have
a stock firewall and floor pan, but may be reinforced on rear firewall. No
boxing in drivers compartment. The dash panel can be fabricated, but in stock
location. Fenders may be trimmed for tire clearance only. Bodies must be full
factory steel and of good appearance. Try to fix any major damage before the
next race. Unibody cars may tie front and rear together. Stock rear section may
be cut behind wheels. Must have front and rear bumpers. No “cowcatcher” front
bumpers. After market nosepieces required. Roll cage should be .095 inches
thick. Four point with down bars must be mounted in at least six places. Roll
bar padding required in driver’s compartment. Driver’s head must not protrude
out of roll cage with helmet on, while strapped in the driver’s seat. Must have
minimum of one cross bar in halo of roll cage, no brazing or soldering allowed.
No brace bars forward of cage may be higher than stock hood height; main cage
must be no farther forward than the engine plate. Minimum of three driver side
door bars and two bars on the passenger side although we Recommend four door
bars on driver side and three on passenger side. Must have doorplates.
Doorplates must be 18-gauge or .049 inches steel minimum. Numbers are mandatory
on both side of car and on roof. Numbers must be readable by scorekeepers in the
scorer’s booth. No homemade seats. Seats must be mounted in framework of roll
cage. SEAT MUST NOT BE MOUNTED ON FLOOR PAN.
SUSPENSION One shock per wheel mounted in stock location. No coil-overs.
No Heim end shocks. Adjustable coil spring spacers allowed. No fabricated or
after market steering or suspension components will be allowed. A-frames and
spindles must match make and model of car. You will be allowed to add ballast to
your car. It must be painted white with car number on it. Ballast must also be
mounted securely to the car. Window nets required on driver’s side window,
securely mounted to roll cage. Nets need to be mounted tight. Plastic skirting
and six inch spoiler is allowed.
ENGINE AND DRIVE TRAIN Engine and power train must be mounted in stock
location and be available for make and model of car. Engines must match frame
and body, i.e. Ford to Ford, GM to GM, etc. No aluminum blocks, heads,
or flywheels. Any factory stamped cast iron intake, GM, Ford, etc. as long as it
matches the motor. Ford 9” rear ends allowed in all makes of cars. Radiator must
be mounted in stock location. Headers are permitted. Ignition Systems must be
stock. No MSD, Mallory, or any other after market ignition system. Clutches:
Clutches must be stock, no button type, triple disc or mini clutches allowed.
Automatic transmissions must use torque converter. No couplers or direct drives
allowed. Automatics must be able to stop and reverse under own power. Standard
transmissions must have an operating clutch. Cars must be able to sit and idle
in gear. All cars must have at least one forward and one reverse gear. Floater
rear ends allowed. All rear ends must be mounted with stock upper and lower
trailing arms. No biscuit arms, lift bars, torque arm, or panhard bars allowed.
No heim joints. Drive shaft must have loop and must be painted white. Quick
steer allowed.
CARBURETORS AND FUEL Any factory carburetors allowed. No Predators
allowed. Carburetor spacer shall be maximum of one and one quarter inches tall.
Holley carburetors are allowed. Pump or racing gas only. NO ALCOHOL.
BRAKES Brake components shall be OEM only with exception of rear brakes,
which can be changed from drum to disc. Can use after market pedals, but no
inside car adjusters. Four wheel brakes mandatory.
BATTERY Battery must be mounted in approved box and securely fastened to
car. Only one battery allowed.
TIRES AND WHEELS IMCA G60-15 tires mandatory. Wheels must be 8 inch
maximum. Tires may not exceed 8-inch tread width. No grooving, trimming, or
slitting of tires. Right front and rear beadlocks allowed.
IF IT IS NOT STOCK DO NOT USE IT!
B-Modified Class
All A-Modified rules will apply except for the following:
1. 2 barrel gas carburetor only
2. $350 plus exchange: Carburetor Claim
3. $625 plus exchange: Motor Claim
4. all cars will run on pump or racing gas only
5. must run manual fuel pump
6. Bert/Brinn and Falcon type transmissions ARE allowed
7. IMCA tires allowed
8. you may still groove and condition tires
9. 8-in. spoiler allowed
10. aluminum tops allowed
Factory Stock Class
Factory stock should closely
follow IMCA type hobby stock rules with the following exceptions:
7 or 8” wheels will be allowed. Bead lock right rear only allowed. IMCA tires allowed. Aftermarket nosepieces allowed.
Racing fuel allowed. Ballast may be used, must be securely mounted in the trunk.
Aftermarket pedals allowed. May reinforce front bumper, may fabricate rear
bumper. Hydraulic throw-out bearings allowed. Hood may be gutted, racing shocks
and springs in stock locations allowed.
1. SAFETY Five point safety belts, sub belt and shoulder harness
required. SFI approved full fire suit, fire retardant neck brace and fire
retardant gloves required, shoes recommended. Helmets are required and must be
Snell SA90, SA95 or SA2000. Helmet must be worn at all times car is on the track
and must accompany vehicle at time of inspection. Roll bar padding required in
driver compartment. Fire retardant padding recommended. Belts must be mounted to
cage. Arm restraints or full size (minimum 16-inch x 20-inch) window net
required (no string-type nets). Window net to be mounted so latch is at top
front of driver side window. Kill switch required within easy reach of driver
and must be clearly marked “OFF” and “ON”. 360-degree driveshaft loop is
required and must be constructed of at least quarter-inch by two-inch steel, or
one-inch tubing, and should be mounted six inches back from front U-joint. All
cars must have a high-back aluminum racing seat fastened to roll cage, NOT
bolted to the floor board. Drivers shoulders can be no further back than the
front of the window post (‘B’ pillar).
2. ROLL CAGE Must use .095 –inch tubing, at least 1.666-inch diameter for
main cage and door bars. No offset cages. Four-post roll cage must be used,
front and rear hoop welded to the OEM frame. Rear hoop must have “X” brace,
consisting of one horizontal and one diagonal bar, 1.25-inch O.D. and .083-inch
wall thickness. Front down-bars must be tied together. Must be minimum of 40
inches between front and rear down bars at top of door panel. No more than 41
inches from top center of windshield to front edge of rear hoop; no more than 13
inches to front edge of front hoop and top halo must be no less than 40 inches
across, outside to outside. Must have minimum of one cross bar in top of halo.
Required rear kickers and engine hoop must be minimum 1.25-inch tubing, with
.083-inch wall thickness. Three horizontal door bars on both sides are
mandatory. Minimum of four uprights tied from frame to top door bar on driver
side, three on passenger side. May have two bars for protection in front of
radiator, behind bumper, within confines of body, no wider than stock frame
horns. May tie front horns together. All bars, front and rear, must be inside
body. Steel door plates, 18 gauge or .049-inch minimum thickness metal, must be
securely welded to outside of door bars on driver’s side. Plate must cover the
area from the top door bar to the rocker panel and from the rear down post to
five inches in front of the seat. Must be visible for inspection. Absolutely no
square tubing or galvanized pipe allowed. Fuel cell protection bar may be used,
mounted frame rail to frame rail, no higher than the fuel cell and inside the
trunk area. Maximum 1.75-inch pipe. Note: Bumpers: may reinforce front bumper as
long as stock front bumper is retained. Re-enforcement may not be bigger than 1
and ½ inch tubing. Rear bumpers may be fabricated but must not protrude outside
of body.
3. ELECTRONICS No transmitting or listening devices allowed in car. No
electronic monitoring computer devices capable of storing or transmitting
information except tach allowed on cars. No digital gauges allowed on car. No
ignition control boxes allowed, OEM ignition only. No electronic traction
control devices allowed.
4. FUEL Regular unleaded or racing fuel. Racing fuel cell required, no
boat or stock automotive fuel tanks. Must be securely fastened above level of
stock trunk floor, inside trunk of car, by at least two 1/8-inch thick solid
steel straps, two inches wide around entire cell or trunk and floor pan may be
cut to accommodate fuel cell. Fuel cell hole not to be bigger than 1” around
cell. Metal firewall must be between driver and fuel cell. All cell mounts must
be steel, attached to frame/cage. No adjustable fuel cell mounts. Fuel cell must
be in a steel container. Fuel cell vents, including cap vent, must have check
valves. Fuel lines through driver compartment must run through metal pipe or
metal conduit. No fuel filters in driver’s compartment.
5. BODY 1960 or newer American made stock passenger automobile with
factory steel top. Sunroofs and T-tops must be reinforced and enclosed. All
bodies must be approved OEM. No spoilers, wings, skirts, air scoops or anything
that alters the stock appearance. No aluminum hoods. Hood must be separate from
fenders – no one-piece or tilt front ends. No gutting of trunks. No cutting out
kick panels. All hoods and trunks must be securely fastened and the back of hood
must be sealed off from driver’s compartment with metal. Maximum seven-inch
metal sun visor may be added to top of windshield opening, only. No external rub
rails allowed. All sharp edges, torn fenders and body panels to be repaired
prior to next race. Must have a minimum of three windshield bars in front of
driver. All glass, plastic, upholstery, rear seat, lights, mirrors, and chrome
removed. Dash is not to extend more than 24 inches back from center of lower
windshield opening. Dash must be flat except for cowl in front of driver. No
other interior tin or covers. All doors must be secured shut (welded, chained,
bolted, no rivets) The front inner wheel wells may be removed, but not the rear
wheel wells.
6. TIRES AND WHEELS 1. 7 or 8” wheels allowed. Beadlocks on right
front and rear allowed. IMCA tires allowed. No softening,
conditioning, siping or grooving allowed. One inch steel lug nuts required.
7. FRAME Frame must match body. 109-inch wheelbase minimum for unibody
cars, 107.5-inch minimum for full frame cars – no more than one inch difference
from side to side. Frames may be “X” braced. Rear of frame behind rear tires,
from a point no further forward than one inch behind the factory seam, may be
replaced in stock location with two-inch by three-inch steel tubing with
.095-inch wall thickness. Factory seam must remain visible. Must replace the
same length material removed. Unibodies must be tied – rear frame to front
frame. No station wagons, convertibles, front-wheel drive, four-wheel drive or
rear engines. Bumpers must be in stock location. Front and rear bumpers must be
capped to fender the width of the bumper. No reinforcement of bumpers.
8. SUSPENSION & STEERING Must be original type suspension and steering
and match the frame. No rear independent suspension allowed. Steel springs only.
No add-on quick steer boxes. No remote reservoirs on power steering pumps. May
use racing shocks and springs in stock location. No spacers, lumber, chains or
cables allowed.
9. BRAKES After Market clutch and brake pedals are allowed with no
external adjustments. Approved OEM brakes on all four wheels must work. No OEM
Antilock Brake Systems. No brake shut-off or bias allowed.
10. BATTERY One 12-volt battery only, must be in a marine-type case
securely mounted to frame or roll cage in a metal frame behind the seat or in
trunk area.
11. DRIVE TRAIN Minimum 2.5-inch diameter steel driveshaft must be
painted white. All forward and reverse gears must be operational. Transmission
must be approved OEM automatic, with original bellhousing and functional torque
converter containing a minimum of three quarts of fluid, or approved OEM single
disc-type clutch inside an explosion-proof steel bellhousing on manual
transmission only. No aluminum flywheels 16 pound minimum for flywheel (Speedway
flywheel weighs 16 pounds and is legal). Hydraulic throw out bearings are
allowed. Automatic must have an approved scattershield (may be constructed of
quarter-inch by three-inch steel, 270 degrees around flexplate or flywheel.
Torque converter must have a minimum 1/8-inch plug. No truck rear ends allowed.
Steel axles only. Nine-inch Ford rear end allowed, but must be mounted like
stock rear end for that make and model. Rear end may be welded or mini spool, no
full spools. No floater rear ends. Rear suspension must match frame. No
electronic or mechanical traction control devices allowed.
12. NUMBERS All cars must be numbered with large, legible numbers on both
sides, top and rear panel. Numbers must be in contrasting color from body, in
all light conditions. Numbers on side of car to be at least 4 inches thick and
20 inches high. Numbers on top must be at least 4 inches thick and 30 inches
high. Recommended that no holographic or reflective numbers be used.
13. ENGINES ARE RESTRICTED TO NINE TO ONE COMPRESSION IN ONE OF THE TWO
FOLLOWING METHODS (TRACK OPTION WHICH METHOD IS REQUIRED):
(A) Nine to one compression ratio using Whistler. Steel heads only. (B) Flat top
pistons only; GM cars – approved steel head numbers are – 014, 195, 267, 330,
336, 339, 388, 393, 441, 445, 454, 487, 493, 545, 598, 624, 642, 709, 799, 813,
862, 881, 882, 920, 991, 993, 997; Ford cars, no after market or SVO heads;
Chrysler cars, no after market or W2 heads, 360 cubic inch heads only. Must be
76 cc heads or larger.
14. ENGINE and CARBURETOR FOLLOWING RULES APPLY TO ALL ENGINES:
(A) The engine must appear strictly stock for that model and make and in the
original mounts. No 400 or larger cubic inch parts allowed. Stroke must match
block. Harmonic balancer may not be altered. Cylinder heads must be unaltered
approved OEM. Maximum 360 cubic inches (370 for Chrysler). No porting or
polishing or alterations of any kind to heads or intake.
(B) Must have approved OEM cast iron two or four barrel intake, maximum spacer
size of ¾ inch . No headers, must be cast iron exhaust manifolds. No center dump
type manifolds. No RV manifolds. Exhaust must extend past the firewall. Must
remain dual exhaust, no crossover or ‘Y’ pipes allowed. No oxygen sensors
allowed.
(C) No electrical fuel pumps allowed. Minimum two-core approved steel or
aluminum radiator. No aluminum water pumps on G.M. cars. No full roller or
roller tip rocker arms. No roller lifters. No stud girdles. Steel or aluminum
pulleys allowed Any overflow tubes are to be directed to the ground, between
frame rails. Mufflers are recommended. Accumulators and Accusumps must be
mounted under the hood. Starter must bolt in stock location. Stock steel
accessory brackets only.
(D) You must run a two barrel carburetor. Legal carburetors include Motorcraft, Rochestor, or 4412 Holley.
Choke horn must remain intact and have carburetor number on it. Carb. must retain
stock appearance. Butterfly size will be checked. May remove choke, but no
other alterations allowed. Conventional air cleaner housings only. No top flow
air cleaner housings, cold air boxes or air cleaner duct work allowed.
4-Cylinder Stock Class
A. Any American made, front wheel drive automobile.
B. No convertibles, station wagons, Jeeps, SUV’s, pickups, etc.
Engines
A. Four (4) cylinder engines only.
B. Completely stock. NO performance parts of any kind allowed.
C. Normally Aspirated- no turbos.
D. Rotary engines not permitted.
E. Maximum of (3) valves per cylinder.
F. (16-valve engines not allowed)
Carburetor
A. Stock carburetor.
B. Fuel injection permitted if car came originally equipped as fuel injection.
If equipped with electric fuel pump, make sure pump is wired thru oil pressure
switch. If vehicle is not equipped with a switch, it must be added.
C. Two throttle return springs mandatory mounted to engine.
Drive Train
A. Spider gears may be welded together to lock front end together.
Suspension
A. Stock OEM parts only.
Steering
A. Stock steering for the make and model.
Wheels, Tires, Brakes
A. Wheels: Stock
B. Right front oversize lug nuts recommended.
C. Wheel spacers are not permitted
D. Any DOT street legal tire permitted. 8 1/2” sidewall to sidewall max.
E. Stock brake system for make and model. All brakes must function. No brake
adjusters.
Roll Bars
A. Four point cage (min.) required. 1 ½ diameter. 095 wall with gussets as
needed welded to (4) 4x4 plates and bolted or welded to floor. No bars may pass
through firewall forward or rear. Two (2) door bars inside drivers door.
B. Galvanized aluminum or exhaust type tubing is not permitted.
C. Recommended 1 ½ diameter .095 wall behind driver’s seat below shoulder
height.
D. Approved padding must be used at any point where driver contact might occur.
Fuel Tanks
Must be inside of trunk with screw or lock type caps. Must be set in steel box
with safety straps and secured tightly. Fuel cell recommended.
Seats and Safety Equipment
Racing seat required and racing belts with 5 point harness. No passenger car
type seats allowed. All seat belts must be a five (5) point hookup. Must be made
of nylon webbing and should be replaced each year. Buckles must be of quick
release. . Where belt fastens to frame or cross section, it must be anchored
below shoulder height. Recommended 3” belts. Passenger belts will NOT BE
ALLOWED. Driver’s fire suit is mandatory. Full face helmets with a face shield
are mandatory. Helmets must be SNELL SA95 or M95 or newer certification. Helmets
must have the rating tag/label intact. Window net is mandatory.
No Mirrors, All Glass Must Be Removed, Doors Must Be Bolted or Welded Shut
Claim
$500.00 claim on complete car less safety equipment, battery, battery cables,
fuel cell, fuel pump and fuel lines. Racing is for Trophies only!!!!
Top four finishers in every race must report to inspection area and are subject to claim in the A feature by any driver finishing fifth of farther back. Any driver lapped by fourth place car is not eligible to claim. Driver allowed only one claim per event. In case of multiple claims on same engine, engine will go to qualified claiming driver by draw. Driver making claim must drive his car immediately after finish of feature to the claiming area under its own power. Driver is only eligible for motor claim if finished the race without being disqualified.
4-Cylinder Car Claim is also subject to rules clarified in the general engine claim section above.