Sport Four Division
Sport Four Division
Microsoft
Word Format 
Adobe
Format
Eligible Models
a. Front wheel drive compacts only
1. Production series must be at least 10 years old.
2. 3 or 4 cylinder models only
b. Maximum 3 valves per cylinder
c. 16 valve and twin cams are eligible with weight penalty
d. No Honda V-Techs
e. Maximum wheelbase of 104.5 inches.
f. No all wheel drives
g. No cars allowed with 4 wheel steering
Chassis
Frame
a. Completely stock unibody frame
b. No modifications allowed
Suspension
a. Stock suspension required.
b. Springs may not be cut or altered in any way
c. No spring spacers
d. Stock suspension for make, model and engine package
Camber
a. To change camber, stock holes may be slotted up to 1/2"
b. Any hole moved more than 1/2" must have prior approval
c. All hardware must be OEM or Grade 8 replacements
Sway Bars
a. Stock original sway bars only
b. Stock mounts only
c. No urethane mounts
d. No adjustments
Roll Cage
a. May either be of four point design or Enduro style
b. Welds must be of good quality.
c. 90 degree intersections should be gussetted.
d. Roll bar tubing must be 1 3/4 inch x .095
e. Two uprights, main hoop, must be behind the driver.
f. These uprights must be located as far towards the outside of the car as
practical.
g. These uprights must be welded to 4 x 4 inch, 1/8 inch plate steel that
is either welded or sandwich bolted to the body.
h. A horizontal bar, at shoulder height, connecting the two rear uprights,
is mandatory.
i. The top of the cage should be at least 4 inches higher than the driver
when seated with their helmet on.
j. Two "down bars" that attach at least 2/3rds of the way up the
main hoop, and project to the rear of the car are mandatory with an Enduro
hoop and optional with a 4 point cage.
k. No bars may pass forward through the front firewall.
l. Rear struts may be braced side to side.
Four Point Cages
a. There will be a minimum of 3 door bars on each side.
b. The driver's side door may be gutted for door bar installation.
Enduro Cage Cars
a. Must have at least 1 bar running forward from the main hoop between the
driver and the driver door.
b. The outside of the driver door must have door plating starting at the rocker
panel and going 12 inches up the door.
c. Plating must be at least 5 feet long
d. Plates must be at least 1/8" thick
Car Body
a. Must Remain Stock
Doors
a. Driver door must be welded at both front and rear edge of door with 10
gauge material or thicker.
b. If driver door is gutted for roll cage installation, then the roll cage
must be plated with 1/8 inch thick metal top to bottom.
c. If driver door is not gutted for plated door bars, then 12 inches of plating,
starting from the rocker panel up, must be welded to the outside of the door
at least 5 feet long.
d Right side door may only be gutted if projecting door bars are installed.
e. Driver's side padding recommended.
f. No rub rails allowed
Hoods
a. Hoods must be pinned in front with at least two hood pins, but must remain
on stock hinges.
b. Rear trunk lid must be pinned or hatchback welded shut.
c. No gutting of hoods, trunks or hatchback doors.
d. Remove under hood insulation.
Bumpers
a. Bumpers must be chained or cabled to the frame.
1. The ends may be capped to the body with 16 gauge,
no wider than the bumper.
b. No trailer hitches.
c. STOCK unaltered bumpers.
1. Replacement bumper may be made out of tubing
2. Maximum thickness .095
3. Single tube only
d. Car must have wrecker tow chain in front and back of car.
Glass
a. All glass, except windshield, must be removed
b. If using lexan or screen for windshield, must be braced with either (2)
1" x 1/8" straps, or (3) 3/8" minimum square or round steel
tubing, evenly spaced.
c. Mesh must be 1" or smaller, 0.035 minimum wire diameter type 304 stainless
steel or equivalent
d. Drivers using screens must use approved full face helmet
f. No tinted windows
Numbers
a. Contrasting Colors
b. Height:
1. Doors: Minimum 16" high
2. Roof: Minimum 24" high
3. Letter suffixes must be at least 50% of Number
size
c. Width: Minimum 3"
d. Clearly readable from the scoring tower from any point on the racing surface
e. Front and rear bumper numbers must be a minimum of 5" high
f. No "spray can" numbering
g. Car make and model must be lettered on top 4" of windshield
h. No gutting of fenders, roofs, etc.
Driver's Compartment
Ignition Switch
a. Stock ignition switch preferred
b. Nonstock switches must be clearly labeled
c. Must be accessible from either side of car
Fire Extinguisher
a. Must be fully charged
b. Must be securely mounted within reach of driver
c. Must be quick release mounting
Padding in Drivers Area
a. Center of steering wheel must be padded
b. Roll bar must be padded by drivers head
c. Inside of drivers door must be padded
d. Additional padding required in areas of possible contact
Window Net
a. Net must be permanently mounted on bottom
b. Quick release mechanism must be toward front roll cage upright near roof
Seat
a. Stock seat may be used
b. properly installed approved aluminum seat
1. Aluminum seat must be high back design
c. Headrest must be supported
d. Rib rest must remain flexible
e. Must be mounted with minimum 3/8" hardware
f. Must use oversize washers
g. Minimum 6 mounting points
1. 4 points on seat bottom
2. 2 points on seat back
h. Stock seat must not be able to fold forward
i. Stock seat must be braced by roll cage in rear
Five 5 Point Racing Harness
a. Required
b. Condition of belts is up to the Officials discretion
c. 3" lap, 3" shoulder, and submarine belt required
d. Secured with minimum 3/8", grade 5 hardware
e. Lap mountings must swivel
f. Shoulder belts must be supported at shoulder level
Oil Pressure Lines
a. No plastic
b. Metal only
Mirrors
a. Allowed, but must be stock only
Steering and Pedals
a. Must remain stock
Engines
a. Must be totally stock for make and model.
b. No Turbochargers
c. No Superchargers
d. No rotary engines
e. Stock rebuild allowed maximum .040 overbore
f. Stock motor mounts in stock location
g. Stock air cleaner and stock air intake required
h. Carburetor, if so equipped, must be stock for make and model.
i. Air conditioner and smog pump may be removed
j. Two (2) throttle return springs mandatory
k. Every car must have either a muffler or catalytic converter.
1. Must use stock down pipe from manifold to muffler
and exhaust must exit behind driver
2. Maximum 93 decibels
3. Measurement will be taken from pit grandstand
4. One week to fix
5. $20 fine every week not fixed
l. Stock exhaust for make and model
m. Cherry bombs allowed, but must meet decibel reading
Transmissions
a. Stock for make and model
b. All gears must function forward and reverse
c. All stock clutch component
d. Stock flywheel .020 maximum clean up cut
Brakes
a. Completely stock, fully functional at all 4 wheels..
b. All cars must have a functioning 3rd brake light.
Wheels and Tires
a. Steel wheels only.
b.. Any aftermarket wheels must match stock dimensions.
c. No wheel spacers.
d. All wheels must be of like size - all 13", 14" or 15".
e. All wheels must have 1 inch lug nuts.
f. Passenger car tires only.
g. 70-80 series only
h. Tires must have a minimum 2/32nd tread depth
i. Illegal tires will be confiscated.
j. No Tire softening or chemical treatment of any kind allowed
k. Track reserves the right to impound any tire for whatever length of time
necessary to determine if it has been chemically treated.
Electrical
a. Battery may be relocated, but must be secured by a minimum 1/8 inch x 1
inch steel strap with minimum 3/8 inch hardware with large head washers.
b. If in driver's compartment, must be covered.
c. If tech inspectors can move battery at all, you will put it back under
the hood.
d. Computer controls and wiring, including data port, must remain as it came
from the factory on fuel injected cars.
e. All cars must have an alternator with belt.
Gas Tank
a. If stock gas tank is ahead of rear axle, it may remain in place.
b. If stock gas tank is behind the rear axle, it must be replaced with a fuel
cell or a boat tank (maximum of 7.8 gallons).
c. Fuel cell/boat tank must be mounted by minimum 1/8 x 1 inch steel strap
with minimum 3/8 inch hardware with large head washers and mounted in trunk.
d. Trunk firewall must be sealed off and fuel cell covered.
e. If fuel cell is in hatchback, the cell must be covered with a metal case.
f. If fuel line runs through the car, it must be sealed in conduit.
Fuel
a. No racing fuel of any type can be used.
1. Fuel must be regular automotive pump gas only
2. Track reserves the right to sample fuel to determine
legality
Weight
a. The only weight or ballast allowed is handicap weight.
1. Add 100 lbs. For 16 valves
2. Add 100 lbs. For twin cam engine
3. Weight will be bolted to passenger side seat mounts
Claim Rule
a. $900 claim or exchange on whole car
1. Claiming not allowed last 2 weeks
b. The claim can be made on a top 3 car by a lead lap car only.
1. Cash must be presented at time of claim.
2. Driver being claimed may take claimer's car instead
of the cash (swap cars).
Procedure
a. Any driver causing a caution will be done for that race.
1. DO NOT stop on the track hoping for a caution Ð
you will be black-flagged.
b. Drivers participating in any other division on the same night are not eligible
to compete in this division.
c. The 141 Speedway officials will determine penalties for violations of any
rules.
d. Top 3 finishing cars will stop at Start/Finish line.
1. Competitors wishing to claim a car have the cool
down lap to pull up behind the car they want to claim.
Safety Equipment
a. A drivers' suit of a flame retardant nature is highly recommended.
1. Long sleeved shirt and long pants are required.
b. 5-point racing seat belt is mandatory.
1. 3 inch lap and shoulder harness and a 2 inch submarine
strap are required.
c. Racing window net with seat belt buckle release required.
1. Seat belt latch will be in top front corner.
d. All bars around driver must be padded.
e. Aluminum racing seats are allowed and highly recommended.
f. Snell 2000 or newer helmet, neck brace, eye protection, and gloves required.
g All cars will be vigorously inspected for safety.
h. Fiberglass racing seats are not allowed.
i. No radio communication allowed.
Lineup
a. Sport 4's will race progressively through the Heat Races to determine event
lineups.
1. Drivers will draw for starting position on week
1
b. Cars will be lined up inverted by Handicap average.
c. Cars not having a Handicap average will be lined up in the rear.
d. You must be checked in by 5:30 p.m.
1. Cars not checked in on time start at the rear
e. Features will be 25 laps
1. 30 cars or more we will split the field and run
2 separate 20 lap A mains.
Miscellaneous
a. Disconnect any airbags.
b. Sunroof openings must be sealed off securely with steel.
c. Functional windshield wipers and washers recommended.
1. May run rain or shine.
d. No traction control.
e. Track may allow cars one week grace.
f. No Titanium allowed anywhere.