2007 Season Rules
Interstate Auto Centers I-90 Speedway
-Wingless Limited Sprints- (Last
revised 12/1/06 )
This class is open to drivers 16 years and older.
Payoff will be based on car count.
- All sprint car frames must be a sprint car design. Both torsion
bar & coil over are allowed.
- No aluminum frames, no aluminum king pins, no aluminum kick bars
and no aluminum bumpers
- No titanium products of any kind allowed on the race car.
- Roll cages must be a minimum of (1.375) inch diameter (.095)
thickness, seamless tubing.
- All race cars must have a front bumper, rear bumper and kick
bars on both sides of the race car, steel only.
- All race cars must have a racing fuel cell with bladder
- All cars must have a minimum of (3) wheel brakes. (Inboard &
- In & out box, sliders & shifter rear ends only. No
transmissions or clutches.
- The drive line must be fully enclosed by a torque tube, torque
tube must have a 3/8 inch inspection hole. A drive shaft loop or a
drive shaft strap is mandatory.
- The engine must appear strictly stock. Cast iron blocks and
heads only. Only stock OEM rods and crankshafts allowed. No (400)
or larger cubic inch parts allowed. Stroke must match block.
- No roller lifters. Guide plates and stud girdles allowed.
- Maximum (360) cubic inches on Chevrolets & (370) cubic
inches on Fords & Chryslers. (2% allowance when tubing for
- 2 3/16” Injection max and must run 1 7/8” sleeves max
,minimum length 3”, (This sleeve must seal with injector stack)
or 2 barrel alcy carb.- injector sleeves must be round, inside
weld may be removed.
- Steel or aluminum pulleys allowed. No dry sump oiling systems.
- Flat top pistons only. Only steel heads allowed. Only 23° heads
will be allowed. Offset rocker arms will be allowed if the offset
does not exceed .250”. No raised runner heads allowed. Titanium
valve retainers will be allowed. Any Ford cast iron head will be
- Minimum 3/4 inch inspection hole on side of oil pan 2 1/2 inches
down from pan rail in line with a journal required. Inspection
hole must be easily accessed by tech official.
- The top four finishers in the events feature will be subject to
an engine protest. Any driver finishing on the same lap as the
fourth place car is eligible to protest provided they are a legal
car, the driver pulls into the claim area under his own power and
announces his/her intentions to protest to the track official and
produces $100 cash. $75 will go to the claimed driver and $25 goes
to the track in the event the protest is accepted. The $75 will
only go to the claimed driver if he is legal. If the claimed
driver is NOT legal, the $75 goes back to the claimer driver. A
protest will be top end only. The intake and heads will be removed
and all parts will be inspected. In the event of a refusal, the
driver will lose all points and pay for the event, be suspended
for two points races, lose his rights to protest for the season
and be required to pay a $300 fine to the track before being
allowed to return. Additional rules apply (see general track rules
for more details).
- Only alcohol or ethanol will be permitted. No gasoline.
- No performance additives allowed.
- No adjustable (from cockpit) shocks or torsion bars allowed.
- Coil over suspension is allowed.
- Right rear tire must be Hoosier SP2 or SP3. Left rear tire must
- All front tires must be Hoosier.
- No tire softeners allowed. Tires must durometer within factory
- Car and driver must weigh a minimum of 1500 lbs. immediately
after each race. Failure to weigh or failure to meet minimum
weight will result in disqualification from that race and all
points and pay will be forfeited. All bolt on weight must be
- Minimum (84) inch wheelbase.
- No plastic wheels allowed.
- No carbon fiber wheels allowed.
- Beadlocks are highly recommended
- No wings, unusual side panels or air foils allowed. Head hoop
required over driver's helmets.
- All numbers must be a 12”minimum on nose cone and must be east
- Competition shoulder harness and lap belt must be a minimum of
(3) inches wide. Submarine belt and arm restraints are mandatory.
Metal to metal buckles are required on shoulder harness and lap
belts. All belts are required not to be over (2) years old.
- Fire retardant racing suit is mandatory.
- Fire retardant racing gloves and shoes are mandatory.
- Fire retardant shoes, socks, underwear and hood are highly
- Neck brace is required
- Roll cage net is mandatory.
- Helmets - SNELL SA00 or SA05 required. Helmets must be worn at
all times when driver is operating race car.
- No transmitting or listening devices are allowed in the race
- No electronic monitoring computer devices capable of storing or
transmitting information, except tach, allowed on the race car.
- Any rules not covered here or any rules in question will be left
up to the officials in charge. Their decision will be final.
Track officials shall have responsibility for rules regulations
enforcement at all events. At the discretion of track officials in
charge, any competitor may be disqualified for rule violations,
hazardous equipment or hazardous actions. All cars are subject to
inspection at any time. Approval of vehicle by the inspector shall
mean only that the vehicle is approved for participation in a
competitive event and shall not be constructed in any way to mean that
the inspected vehicle is guaranteed mechanically sound. Be it further
declared that the inspector shall not be liable, for any losses or
injuries resulting from the same. Any unsportsmanlike conduct by the
drivers, owners and/or pit crews shall be grounds for
disqualification. Drivers are responsible for the conduct and action
of their crew members. Absolutely NO alcoholic beverages will be
consumed by driver or pit crew prior to or while competing. No use of
illegal drugs. All drivers must be at least 16 years of age (proof of
age required). Drivers under 18 years of age must have a signed
and notarized parental consent form by parents or legal guardian and
said consent must be in the hands of the track official before the
individual will be allowed to participate in any event. The rules
and/or regulations set forth herein are designed to provide for the
orderly conduct of racing events and to establish minimum acceptable
requirements for such events. These rules shall govern the condition
of all events, and by participating in these event, all participants
are deemed to have complied with these rules. NO EXPRESSED OR IMPLIED
WARRANTY OR SAFETY SHALL RESULT FROM PUBLICATIONS OF OR COMPLIANCE
WITH THESE RULES AND/OR REGULATIONS. They are intended as a guide for
the conduct of the sport and are in no way a guarantee against injury
or death to a participant, spectator or official. The race director
shall be empowered to permit reasonable and appropriate deviation from
any of the specification herein or impose any further restrictions
that in his/her opinion do not alter the minimum acceptable
requirements. NO EXPRESSED OR IMPLIED WARRANTY OF SAFETY SHALL RESULT
FROM SUCH ALTERATION OF SPECIFICATIONS. Any interpretation of
deviation of these rules is left to the discretion of the officials.
Their decision is final.