2010 Fremont Speedway
and Attica Raceway Park
305 Sprint Rules – 2010
Questions: Please contact
Promotor Rich Farmer at 419 - 307 - 4241
General Information
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 in advance.
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.
Engines
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. The scat crank will not be allowed after
2008.
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 11:1
ratio.
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 used.
5. Only stock diameter (0.842 inch)
Flat tappet or Hydraulic lifters may be used NO ROLLERS OF ANY KIND
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 immediate
disqualification.
2. No electric fuel pumps.
Wheels and Tires
1. All wheels must be steel. No aluminum
centers, or aluminum hub adapters with “wide five” wheels will be allowed.
No direct mount front hubs.
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 to approval.
4. No tire pressure pop-offs or bleeders
allowed.
5. Right Rear Spec Tire - 200 Goodyear.
6. Left Rear Spec Tire - 100 Goodyear.
305
Teams will be allowed to use up last years
spec
tire during races in April only.
7. All tires must be available to everyone.
Brakes
1. All brakes must be in good working
order at all times.
2. Failure upon inspection mandate
disqualification.
3. No carbon fiber parts will be allowed.
Wings
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 61 inches.
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 the nut.
7. Workmanship, safety, and appearance
shall determine whether or not a car will be allowed to compete.
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…)
Safety
1. Aluminum racing seat required.
2. Five point seat belts required.
Belts cannot be over 2 years old.
3. Helmet – Snell 2000 or newer required.
4. Flame retardant driving suit required.
5. Flame retardant driving gloves required.
6. Flame retardant driving shoes required.
7. Fire proof underwear and socks recommended.
8. Arm restraints required.
9. Roll bar padding, headrest and rock
screen required.
10. Side head restraints recommended.
Technical Procedures and
Penalties
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
Infraction.
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