Provisional 1/8 Super GT rules to be completed and published
April 30, 2010
ROAR is authoring rules for the "GT" category, which it will refer to as "1/8 Super GT" to avoid confusion with other categories that are also called "GT." The rules pertain to the 1/8 off-road based vehicles that feature on-road passenger and road racing body shells.
This is a category that's been gaining in popularity due to reasonable cost, high durability, lower maintenance and the scale appearance of these big machines. ROAR desires to preserve the most appealing elements of what has made this a popular and growing category. ROAR invites all industry affiliates and current members to inquire with questions or additional suggestions for the rules. Please contact fuelsection@roarracing.com or technicaldir@roarracing.com for additional information.
Listed below are some provisional rules that will be included in the final draft. Also under consideration are Spec and Modified class rules, as well as brushless electric power systems.
?Super GT cars MUST be based on current production buggy/truck chassis, drivetrain and suspension components.
? The chassis plate must include the same amount of kick-up currently used in its off-road configuration (chassis cannot be flattened).
? Minimum caster angle (TBA)
? Shaft drive only
? Non-adjustable centrifugal clutches only - no Centax or adjustable clutches
? Rubber tires only, no foam tires - possibly spec tires
? No dish wheels - a minimum of 50-percent of the wheel face must be open
? 17mm hex hubs only ? no quick-change hubs
? Licensed bodies only
? Bodies from ALMS GT, GTC classes, (formerly GT1 and GT2), DTM, Super GT, V8 Supercars, and BTCC are acceptable. Additional series or provisional approval of various performance vehicles not currently involved in a racing series are also under consideration.
? Bodies will remain legal up to 5 years after the vehicles last use in competition
? Maximum of two mechanical disc brakes, which must be mounted to the center driveshafts/outdrives. No pressurized or electronic braking systems are permitted.
? Open bevel-gear diffs or solid drive axles only - no Torsen, limited slip or one-way diffs
? Maximum of two-speeds - centrifugal, automatic transmissions only
? Spec and Modified classes - each with reasonable limits to control costs
? brushless modified class based on current rules for power systems in the off-road category
? .21 to .28 engines are permitted
? 150cc fuel tank limit
