2012 Fremont Speedway
and Attica Raceway Park
305 Sprint Rules – 2012
The following specifications
have been prepared by Fremont Speedway as guidelines for the construction
of the 305-Sprint Division. No warranty of safety is expressed or
implied as a result of this publication of rules. These rules are
intended as guide and are in no way guarantee against injury or death to
participants, spectators, or others. Anything not covered by these
specifications should be approved by the track officials and placed in
writing. Continuous developments in auto racing and technology may
mandate changes in these specifications. However, it is our
intent to enforce and police these rules throughout the season. If
a change is necessary, technical bulletins will be prepared and distributed
This division was developed
for the fun of racing in a low cost fashion. This requires limits
in various areas to keep competition equal and fair for all participants.
In order to accomplish this, if it doesn’t say you can – don’t! With
the help and consideration of the participants, this can be accomplished.
Try to live within the spirit of the rules. If you have questions,
please contact track officials before you are found illegal for competition.
The only titanium that
is allowed is the lower shaft in the rear end.
Track officials have the final say in
determining the eligibility of each participant.
1. All engines must be
GM 305cid V8s. The block must be stock production type with maximum
3.805 inch maximum bore (316 cid maximum). Engine must have all casting
numbers for identification purposes. The block must be completely
stock appearing (no grinding) on the outside. All engines must have flat-top
pistons on stock type connecting rods. Polishing of the sides of the rod
I-beam permitted. Pistons may not protrude out of the block. Crankshafts
may be stock GM 305 cast iron shaft with 3.480 inch maximum stroke or
the Callies compstar crank and this can also be used as it comes out of
the box no lightning other than balancing.
2. Cylinder heads must
be Brodix Spec or All-Pro Aluminum
Brodix spec head requirements
are: P/N: SP ST (bare) or SP ST
PKG (complete). Both p/n’s are the same casting (casting marks and
stampings). Head must remain as cast. No porting or polishing of any kind
in the intake or exhaust ports, under or behind the valves. No port matching.
Do not disturb the combustion chamber. Brodix stamps must be seen.
Must pass a 11:1 compression ratio this will be checked with a whistler.
ALL PRO spec head requirements
are: To be 305 spec ALL PRO Head must be remain as cast. The same rules
apply as those of the Brodix head. All Pro head will have marks in the
ports similar to the Brodix. These heads must also pass the whistler at
3. Valve springs must
be straight and stock diameter of 1.26 inches. Stud mounted roller rocker
allowed. No shaft mounted systems. No stud girdles. No rev kits. Screw
in studs and push rod guides plates allowed.
4. Any ignition may be
5. Only stock diameter
(0.842 inch) Flat tappet or Hydraulic lifters may be used NO ROLLERS OF
6. The oil system must
be a wet sump system. No dry sump systems will be allowed.
7. Maximum fuel injection
size permitted is 2 3/16 with all fuel lines in the manifold. No
down nozzles allowed. Only one nozzle per cylinder. No carburetors
or carburetor-style injections allowed. Stacks must be removable
for technical inspection.
8. Schoenfeld Muffler
112535 required. No down-turned elbows.
Track Officials will have
the right to check engines at any time and will have the final say in determining
the eligibility of any engine. Any illegal engine parts will confiscated
until end of season.
Fuel and Fuel Pumps
1. Only straight alcohol
(methanol) allowed. No gasoline, nitro, or nitrous systems.
An approved fuel bladder is mandatory. Fuel system infractions mandate
2. No electric fuel pumps.
Wheels and Tires
1. All wheels may be
steel or Alum.
2. Any steel wheel is
permitted with the approval of Track Officials.
3. All right-rear wheels
must have a bead-lock system with a tubeless tire. These are subject
4. No tire pressure pop-offs
or bleeders allowed.
5. Tires are the Good
Year Spec ONLY
6. Bleeders will be allowed
1. All brakes must be
in good working order at all times.
2. Failure upon inspection
3. No carbon fiber parts
will be allowed.
1. A top wing is mandatory.
The wings must be a minimum of 15 sq. ft and a maximum size of 25 sq. ft.
(Note, the 25 sq. ft. maximum size is consistent with both the “All Stars”
and “World of Outlaws”.) Dished or Flat wings allowed
Maximum 1" wicker
bill. Triangular side panels on roll cage allowed. Must be within roll
cage and template. No body panel turn-outs allowed.
2. 30 in x 70 in will
be the maximum area allowed for sideboards. Max wing width will be
3. No wing adjustments
from the cockpit will be allowed. No hydraulic cylinders or valves,
no levers or cables for adjustments will be allowed.
4. Number must appear
on both sides of the wing in sizes suitable for scoring purposes. Numbers
must be 16 inches tall.
5. Front wings or nose
wing will be allowed. If a front wing is used, the maximum size is
6 sq. ft. Leading edge of nose wing must be within 20” of leading edge
of front axle.
Body, Frame, and Bumpers
1. Frame and body must
be sprint car appearing and must be inspected to be deemed safe for competition
by Track Officials.
2. Front and rear bumpers
are required. Any bent or broken bumpers not meeting the approval of Track
Officials must be replaced. No aluminum or titanium bolts allowed
anywhere on the car. No carbon fiber or titanium parts will be allowed.
All bolts must pass a magnet test.
3. Nerf bars, right and
left are required.
4. No rubber stretch
straps or bungie cords.
5. No black pipe fittings.
6. No nut will have any
internal threads visible. The bolt should be at least flush with
7. Workmanship, safety,
and appearance shall determine whether or not a car will be allowed to
Axles, Drivelines, Steering
1. Front spindles may
be steel or aluminum.
2. Any torque tube will
be permitted. A torque tube safety hoop is required. No straps.
3. Any rear axle may
be used. Steel or aluminum. May have titanium lower shaft.
4. No torque arms or
open drivelines allowed.
5. Only approved racing
steering boxes - Power or Manual.
6. No cockpit adjustments
of any kind allowed. ( weight-jackers, shocks, wing sliders,…etc…)
1. Aluminum racing seat
2. Five point seat belts
required. Belts cannot be over 2 years old.
3. Helmet – Snell 2000
or newer required.
4. Flame retardant driving
5. Flame retardant driving
6. Flame retardant driving
7. Fire proof underwear
and socks recommended.
8. Arm restraints required.
9. Roll bar padding,
headrest and rock screen required.
10. Side head restraints
Technical Procedures and
1. Any car may be inspected
after an event by Track Officials. If a car is found to be illegal during
technical inspection after event, the illegal car will lose its finish
position, all points, and money for that event.
2. Upon the occurrence
of the second infraction, all points earned for the year up to date will
be forfeited as well as the points and money for that event. The
owner/driver and car will be suspended for four dates of competition.
This suspension can be carried over to the following season.
3. Track officials will
have the final say in determining the validity of a protest or rules
4. Transponders are required
5. Raceceiver radios required