2016 4 CYLINDER RULES
SAFETY: Required helmets must be Snell Rated SA2005, SA20lO or SA 2015 Helmet. Must
have helmet shield or goggles. Helmets must be worn at all times including packing. No
passengers allowed during packing. SFI approved full fire suits, fire retardant neck braces and
gloves are required. Fire retardant shoes highly recommended. Roll bars must be padded around
driver. Ifin driver compartment, battery must be in enclosed box and securely mounted. 16×20
driver side ribbon or mesh type window net or arm restraints required. Window net to be
mounted so latch is at the top front of the window. Five point safety harness required and must be
securely mounted to roll cage using 1/2″ diameter bolts. Aluminum racing seats only and must be
securely fastened to roll cage. Kill switch to be mounted within easy reach of driver and clearly
marked “on/off’. Must have an additional master shut off switch mounted BEHIND driver seat
on horizontal surface (floor is not acceptable), clearly marked “on/off’, and be easily accessible
Cars required to bring service manual(s) to the track. Leaving tech area without Tech or other
Track Officials approval will result in a disqualification.
CAR AND BODY: 4 cylinder front wheel drive cars only. Must be neat appearing. Maximum
wheelbase 107″ with no more than 1″ difference side to side. All glass and trim must be
removed. Must have stock bumpers or stock appearing bumper covers. You will not be allowed
to compete without front andlor rear bumper. Stock dash should be removed. Interior must be
gutted. Stock floor pan must remain. Driver seat must be in confmes oforiginal location. No
interior tinning. No mirrors allowed. All window openings must remain uncovered. Clear lexan
in quarter windows allowed. No body skirting allowed below body lines and must be securely
attached top and bottom. Maximum 7″ visor may be added to top of windshield opening.
Minimum 12″ vertical window opening on left and right sides. Fuel tank must have shield on
underside, fuel cell highly recommended. Firewall required between driver and fuel cell if used.
If fuel cell does not have aircraft style positive seal filler neck/cap system – a flapper, spring or
ball type filler rollover valve is required. Must have doors chained or welded shut. Must have
3/8″ diameter or larger cable hooks installed on both the front and rear. No bars or rub rails
allowed outside of body. Minimum 24″ tall numbers on both sides of car. Must have minimum
6″ tall car number visible from front of car.
ROLL CAGE: All cars must have minimum 4 point roll cage. Material must not be less than
1.625″ O.D. tubing and must have a wall thickness of .095″. Low carbon, mild steel tubing is
recommended. Other materials are subject to prior approval. No iron pipe or square tubing
allowed. No brazing or soldering allowed. Must be electric welded and well constructed. Cage
must be safely mounted, example: four 114″ plates and mounted to the floor with four 1/2″ bolts
per plate. Must have minimum of four windshield bars in front of driver.
DRIVER DOOR BARS: Must be as parallel with the ground as possible and located
perpendicular to the driver so as to provide maximum protection for driver without causing
undue difficulty in getting into or out of vehicle. Material must not be less than 1.5″ O.D. tubing
and must have a wall thickness of .095”. Three horizontal door bars on both sides are mandatory
and must be welded to the front and rear roll cage members. Minimum offour uprights tied from
frame to top door bar on driver side, three on passenger side. Driver side door plate constructed
of 18 gauge or 0.049 inch minimum thickness steel highly recommended
TIRES, WHEELS & SUSPENSION: Car must only run 13, 14, 15, 16 inch size tire/wheel and
must be the same left to right. May run different size front to rear. Must be OEM steel or
aluminum wheels with maximum 7″ width with minimum 1″ lug nuts. Maximum tire width of
215 (example: P215170RI6). No N,Q,R,V,W,Y, or Z speed rated tires allowed. No mud and
snow tires allowed. No softening of tires allowed. No siping, grooving or grinding oftires
allowed. Tire size must be CLEARLY marked so it can be easily found and read. Brace allowed
between strut towers, front and rear. Re-enforcing of right rear hub allowed. No bead-locks or
mudplugs allowed. No aftennarket suspension parts allowed.
ENGINE: Engine must be OEM in make/model of car. No modifications allowed. No turbo,
super charged or rotary engines. Maximum 225 lbs compression. No performance enhancing
parts allowed except for exhaust header. All parts must meet OEM specs for make/model! year.
Aftermarket air filter allowed but with no air funneling devices. Exhaust must extend past the
driver and point towards the ground. Must have metal firewall between driver and fuel tanklcelL
Any over flow tubes must be directed to the ground, inside frame rails.
FUEL: Maximum 93 octane gas only. No alcohol or additives of any kind.
BRAKES: All 4 wheels must be stock hydraulic type “vith no adjusting type mechanism in the
DRIVETRAIN: No locked, limited slip or welded differentials allowed.
WEIGHTS: Must be bolted on and painted white with car number clearly marked.
Any rule, covered or not covered, will be interpreted by track officials. Officials’ decisions on
scoring and rules are final. Promoter retains the right to change and/or interpret the rules in the
interest of better competition or safety.