2014 Fremont Speedway and Attica Raceway Park - Dirt Truck Rules PDF Print E-mail
Tuesday, 28 January 2014


ImageGeneral Information

The following specifications have been prepared by Fremont Speedway and Attica Raceway Park as guidelines for the construction of the Dirt Truck 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

 

Eligibility

The only trucks to be used will be Chevy S-10, GMC S-15, Ford Ranger, and Dodge Dakota.

 

Appearance

  Stock factory steel bodies only, complete including tailgates.

  Inner panels may be removed below factory beltline.

  Door window opening must remain stock with complete door factory headers.

  Windshield and back window openings must remain stock factory construction.  No fillers in the windshield.

  No hood scoops of any kind. This includes any factory options or up-level vehicles. No holes in hood.

  Hood crown must remain factory stock.

 Stock bumpers only which may also be reinforced.  No visible crash bars – front or rear.

  Bumpers must be no lower than 12 inches. No higher than 16 inches to the bottom.

  Top of bumper may not be any higher than 2 inches from bottom of tailgate.

  Wheel opening flanges must be turned inboard.

  Stock appearing rockers (size & location). No body-side skirts below rockers. No rear skirts.  This measurement from the top of box to bottom of rocker must be no longer than 32 inches.

 Truck must have front and rear firewall with adequate protection.  No holes showing.

  Rub rails made of one-inch square tubing will be allowed.  Rails must have ends tapered and be mounted tight against the body and be free of sharp edges.

  Rear deck may be covered with aluminum or steel and have a hinged lid over the fuel cell.

  Rear deck cover must be flat and flush with top of box. Must run full length of box.

  All trucks must be neatly painted and lettered.  The truck must have a number of no less than 18 inches on each door and roof.

  Badly damaged trucks will have to be repaired. Any sharp edges must be repaired or made smooth.

 

Spoilers

Spoilers must be mounted on rear of the bed.  Spoiler Blade will be a maximum of 8 inches. Spoiler Blade must be flat. Maximum of 1-inch high wicker bill. Any spoiler angle.

 

Spoiler may not extend past sides of the bed.  Spoiler sideboards no larger than 100 square inches.  Only 3 supports will be allowed.

 

Chassis 

  Stock truck frames must be used.

  Frames must remain stock width.

 Frame supports may be added.

  Frame lighting holes not allowed.

  Frame rails must remain stock from front to rear.

  Lower engine is allowed may not remove the lower portion of factory cross member. Frame must be plated in if there is material removed.

  Notching frame to lower seat ok must remain factory frame bottom and lower 2 inches of the side. Frame must have square tubing put in this area to support frame.

  Roll cages will be 6-point design with 1 ½ inch minimum diameter with .095 wall tubing with a minimum of 3 bars in each door. Each door bar must be single piece construction.

  Saddled tubing joints recommended. If not, gussets required.

  Roll cage offset allowed on right hand side only.

 

The following wheel bases will be used:

 

Chevy/GMC

S-10/S-15

Ford Ranger

Dodge Dakota

Short bed

108”

108”

112”

Long bed

118”

114”

124”

Ext. Cab

123”

125”

131”

 

 

Suspension, Springs and Shocks

  Racing coil springs may be used with a minimum of 5 inch diameter – front only.

  Weight jack bolts will be allowed on front coils only.

  Rear leaf springs must remain in stock locations. Using factory front mount.  No rear coils

  Rear sliders or shackles allowed. Shackles must be mounted in factory location.

  Rear springs will be allowed to be aftermarket. However factory wheelbase must remain.

  If rear sliders are used they may be placed within six inches of factory spring mount.

  Rear spring cannot mount any higher than the bottom of the frame.

  No coil-overs allowed.  No coil-over eliminators allowed.

Racing shocks may be used.  One shock per wheel. NO GAS SHOCKS ALLOWED

  Upper A-frames may be tubular. Upper A-frames may be notched for weight jack bolts and may run parallel to frame. Upper A-frames must have a connected rear cross shaft.

 Lower A-frames must be factory and may have a maximum extension of 2 inches. Extension must straight out. Lower A-frame must be mounted in factory mount.

  Any factory spindle may be used.  No after market or tubular spindles may be used.  No wide 5 hubs.

  Rear end torc-link may be used.

  Strap for drive shaft required.

  Drive shaft must be painted white.

 

Steering

  Steering must remain stock to frame.  Original equipment only. Aluminum tie rods ok.

  Minimum of 2 universals in steering shaft.

  Steering quickner may be used.

 

Rear End

  No quick changes.

  9-inch Ford rear end allowed.

  Floater rear end may be used.  No aluminum.  No wide 5 hubs.

  Rear ends may be locked.

  Maximum rear track width of 74 inches as measured from outside sidewall of left rear tire to outside sidewall of right rear tire.

  No four link or Z link type

  Rear end must mount solid to the rear spring no floating bird cages allowed.  Must have 2 u bolts on each side holding rear end solid to the springs.


Brakes

  Must have 4 wheel brakes working at all times.

  Disk brakes on the rear ok.

  No aluminum calipers.

  Dual master cylinder/pedal assembly with brake adjuster may be used.

  No brake shutoffs of any kind.


Wheel and Tires

  Any 8-inch by 15-inch steel racing type wheel only.

  No aluminum wheels.

  Bead locks ok.

  Any brand 8 inch racing tire allowed. NO STREET OR HIGHWAY TIRES ALLOWED.

  Wheels and tires must pass tire gauge. 

 

Engine

  Any V-8 or 6 cylinder engine may be used.

  Any engine may be used in any truck ( For example,  a Chevy engine in a Ford truck ).

  Engine setback #1 spark plug will be no farther back than the center of ball joint.

 No aluminum heads or blocks.

  Only one Holley 4412 - 2 barrel carburetor allowed – Must pass Holley No-Go gage. Choke plate must be removed. No Dominator or Predator style. No Webers.

  Adapter plate ok.  (Remember no hood scoops)

  Aluminum intakes ok.

  Headers ok.

  Exhaust may not protrude past side sheet metal.

  No crank trigger ignition. No magnetos.

  Schoenfeld Muffler 112535 or 113035 required.

 

Radiator and Fan

  Radiators must be in front of engine.

  Overflow can must be used.

  Shroud must cover upper 180 degrees of the fan. Shroud must be metal and completely cover fan.

  Electric fan ok.

  No oil coolers allowed in drivers compartment.

 

Transmission

  Any OEM transmission may be used.  Must be stock appearing.  Automatic or standard ok.  

  No quick-change transmissions.

  No Bert or Brinn type transmissions.

 

Clutch

  No dog clutches.

  No direct drives of any kind. Front pump drives OK.

  Any stock clutch or multi-disk may be used.

 

Fuel Cell

  Fuel cell in steel can is mandatory.

  Must be mounted behind rear axle with minimum of 2 – 2 inch by 1/8 inch steel straps around fuel cell.

  Fuel filler may not extend outside of body.

  No electric fuel pumps.

  Fuel lines must run under floorboards

  Pump gasoline or straight alcohol (methanol) only.

  No nitro or nitrous oxide systems.

 

Safety

  Helmets required and must pass inspection. (Snell 2005 is highly recommended).

  Flame retardant driving suit required.

  Flame retardant driving gloves required.

  Fireproof driving shoes required.

  Competition type seat belts must be used. Lap belt and shoulder harness must be 3 inches in width minimum. Belts cannot be over 3 years old.

  Anti-submarine belt required.

  Aluminum racing seat is required.  Seat must be mounted to roll cage in at least 4 places, 2 on the back and 2 on the bottom. (Full containment seats are highly recommended.)

  Must have approved padded headrest.

  Roll Bar padding required.

  Safety Bars required in front of driver.

  All trucks will be equipped with a small dry chemical fire extinguisher mounted (not taped) within drivers reach.

  Battery cannot be located in driver’s compartment. Battery must be on inside of frame rails.

 

Miscellaneous

  No mirrors.

  All trucks must have tow hooks, front and rear.

  Any trucks found illegal may forfeit points; money earned or may be suspended.

  Any illegal parts may be confiscated for the season.

  Rules may be added or changed as needed to better the division.

  Technical directors and track officials decision is final.

 
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