600cc MICRO SPRINT RACE CAR SPECIFICATIONS (NOTE BOLDED LINES)

• Engine cannot exceed 637cc, aside from that anything goes. 
• Kawasaki 636 engines must retain stock bore and stroke. 
• Any carburetor or fuel injection system is allowed. 
• May run gasoline or methanol. 
• No fuel additives except for top-end lube allowed, this will be checked. 
• No forced air induction or nitrous systems. 
• Cars must be equipped with a working clutch and starter. Car must be able to start
• and take off under own power at the beginning of event. 
• Mufflers with packing are mandatory with muffler being firmly attached to either
• the chassis or nerfbar. 
• Car weight will be a minimum of 775lbs. 
• Tires on car may be Hoosier or American Racer Tires. 
• Right Rear tire must be a Hoosier NMMA, Hoosier ASCS#2 or an American Racer MD57 and must durometer at least 50, both before and after the race (15 minute cool down will be allowed after the feature before being checked).
• Fire walls are mandatory between driver and engine. 
• Wings must be maximum 12 sq. ft.
• No radio or in-car communication allowed. 
• No Traction Control.

      ATTENTION PA 600cc SPEEDWEEK PARTICIPATING TRACKS

• A 2008 PA 600 Speedweek participating speedway CAN NOT run a 600cc Micro Sprint Show during any other Speedweek race.  Tracks that ignore this rule will lose their Speedweek date and will be eliminated from all future speedweeks.