COMPETITION RULES AND CLASSES


All classes are competitive and competition rules are enforced! Please make sure that you read and understand the rules for the class you plan to compete in. If you have any questions please contact us for clarification. Any protests of competitors in your class MUST BE BROUGHT TO THE ATTENTION OF ISD STAFF BEFORE THE 1ST ROUND OF ELIMINATIONS, NO EXCEPTIONS!

ALL PAYOUTS ARE BASED ON FULL CAR FIELDS


Rules That Apply to All Classes

DRIVERS MEETING IS MANDATORY. IF YOU ARE NOT PRESENT, YOU DO NOT RACE! CHECK EVENT SCHEDULE TO CONFIRM DRIVERS MEETING TIME.

  • Doors must open and close from inside and outside the vehicle.

  • No center drive configurations.

  • Dash must remain EXCEPT FOR SHOWDOWN AND IMPORT VS WORLD CLASSES.

  • Vehicles must be street legal in all other aspects not specifically defined as allowed by rule such as, but not limited to: headlights (removal of one for air indication is allowed except where noted), cooling system & brake lights. This includes hoods, bumper covers (bumper removal ok).

  • All classes except Import VS. World, Showdown, All Motor Comp, and Modified Street must carry a recently valid registration tag (current year or previous year i.e. expired is ok, 2+ years old is not).

  • Wheelie bars are only allowed in Import VS. World and Showdown classes. Strictly forbidden in all other classes.

  • Vehicles can be towed to the track in all classes, assuming other street ability requirements of that class are met.

  • One vehicle is allowed in one class ONLY. A driver may enter multiple vehicles and run multiple classes, However, there are no considerations made for delaying competitions to accommodate this!

  • Any protests of competitors in your class MUST BE BROUGHT TO THE ATTENTION OF ISD STAFF BEFORE THE 1ST ROUND OF ELIMINATIONS, NO EXCEPTIONS!

 

Classes

  • Import vs. World (Domestic OK)
  • Showdown
  • Modified Street
  • Street Tuner
  • 11.5 Index (Domestic OK)
  • 10.0 Index (Domestic OK)
  • All Motor

Competition rules apply ONLY to the class for which they are listed under. Test and Tune passes can be made with any configuration or setup, and any modification that meets track safety requirements. Test and Tune cars can have any engine or configuration.

Import VS. World Class (BUY-IN $200)

-1/8 Mile - No Time-

  • Pro Tree (.400) (VS marked on side windows and rear glass)
  • FWD/RWD/AWD - No Restrictions on Power Adders
  • Open to all Makes/Models
  • Body: Lightweight components limited to hood, front fenders, decklid/hatches, roof, sunroof, wings, ground effects, bumpers, and doors. One piece front ends OK. Aftermarket doors must appear factory. Factory quarter panels only. Overfenders/flares OK as long as factory metal is still in place. Removal of body parts during competition is prohibited.
  • Chassis: Must retain stock chassis, floorboard, firewall, and framerails. Aftermarket K-members OK. Modified radiator core support OK. Tube chassis allowed forward of front strut towers. 2 rotor and 4 cylinder cars may run back halved chassis rear of firewall. Mini tubs OK.
  • Suspension: Must retain factory mounting points/location for front. Any rear suspension configuration allowed.
  • Tires:

    Import Powered - No restrictions

    Domestic V8 - Max 28" tire. No Wheelie bars

  • Fuel Cells allowed
  • Transmission: No restrictions.
  • Engine: No restrictions.

Showdown Class (BUY-IN $100)

  • Pro Tree (.400) (SD marked on side windows and rear glass)
  • FWD/RWD/AWD – 2 Power Adders Allowed (Turbo/Supercharger + Nitrous)
  • Slicks Allowed
  • Any Exhaust Configuration Allowed
  • Fuel Cells Allowed
  • Wheelie bars are allowed, but limited to a 28”x10.5" tire if wheelie bars are used
  • Any transmission allowed
  • Engine swaps out of manufacturer OK. Limited to Import engines only. No V8s.

Modified Street Class (BUY-IN $75)

  • Pro Tree (.400) (MS marked on side windows and rear glass)
  • FWD/RWD/AWD - Single Power Adder ONLY
  • Tire Limits: -FWD: Full Slicks Max 25” x 9.5" -RWD: ANY DOT approved tire -AWD: ANY DOT approved tire
  • Front half of interior, single seat ok
  • Any Exhaust Configuration Allowed
  • Fuel Cells and tanks must be 5 gals or more
  • Engine/Transmission swaps allowed only within same make (Honda/Acura, Nissan/Infinity, Toyota/Lexus, etc) -Must have at least 4 forward gears
  • Transmission swaps to out of manufacturer transmissions are not allowed
  • No Straight Axle Conversions
  • Suspension must be mounted in stock location
  • No alternation of firewall or floor pan
  • NO Lexan Windows or One Piece Front Ends

Street Tuner Class (BUY-IN $50)

  • Pro Tree (.400) (ST marked on side windows and rear glass)
  • Turbo Size Limit 62mm for any entry. This is a "Peer Tech" rule, any violations must be brought up before first round eliminations.
  • FWD/RWD/AWD - Single Power Adder ONLY
  • Tire Limits: -FWD: Full Slicks Max 25" x 9.5" RWD/AWD: DOT approved drag radials ONLY.
  • Full interior required. All interior parts must be installed! NO EXCEPTIONS!
  • Windows must roll up and down.
  • Exhaust - Any exhaust configuration ok.
  • Fuel Cells are not allowed, Sumped Factory Tanks OK
  • Engine/Transmission swaps allowed only within same make (Honda/Acura, Nissan/Infinity, Toyota/Lexus, etc) -Must have at least 4 forward gears -NO Electronically/Hydraulically Assisted Manual Transmissions Allowed
  • Transmission swaps to out of manufacturer transmissions are not allowed
  • No Straight Axle Conversions
  • Suspension must be mounted in stock location
  • No alternation of firewall or floor pan
  • Current Tag required · NO Lexan Windows or One Piece Front Ends

10.0 Index/11.5 index class (BUY-IN $75 for 10.0 class/$50 for 11.5 class)

  • Pro Tree (.400) (0X/1X marked on side windows and rear glass)
  • FWD/RWD/AWD -No restriction on power adder type or combination
  • Any transmission Allowed
  • Any exhaust configuration Allowed
  • No electronic timing assist devices allowed. Given the nature of some of these devices this is a "Peer Tech" rule. Any violations must be reported to ISD staff before first round eliminations.
  • Running faster than 10.0/11.5 will result in elimination

All Motor Class (BUY-IN $50)

  • Pro Tree (.400) (AM marked on side windows and rear glass)
  • FWD/RWD/AWD - Absolutely ZERO power adders (i.e. nitrous, turbo, supercharged, even if OEM)
  • Tire Limits: -FWD: Full Slicks Max 25" x 9.5" RWD/AWD: DOT approved drag radials ONLY.
  • Full interior required. All interior components must be installed. NO EXCEPTIONS!

  • Windows must roll up and down.

  • Open headers/exhaust allowed. Must exit underneath vehicle.
  • Fuel Cells are not allowed
  • Engine/Transmission swaps allowed only within same make (Honda/Acura, Nissan/Infinity, Toyota/Lexus, etc) -Must have at least 4 forward gears -NO Electronically/Hydraulically Assisted Manual Transmissions Allowed
  • Transmission swaps to out of manufacturer transmissions are not allowed
  • No Straight Axle Conversions
  • Suspension must be mounted in stock location
  • No alteration(relocation) of firewall or floor pan
  • Current Tag required
  • NO LEXAN Windows or One Piece Front Ends