Just in case you have not gone to the
sssprints.com web page here are the simple to the point rules
2015 Gator "DIRT" Nationals rules:
Must be midget style body hood tail tank
13" tires and wheels only
RR wheel 12" max...LR wheel 10" max...FT. wheels 8"max
OLDER National Midget engines... 8" LR wheel and 10" RR wheel
NO newer National Engines allowed as in Esslinger,Fontana,Toyota,Mopar ect.
Older push rod motors (166 only)
RR SP-4 and LR D-12 only with mim. hardness (Durometer).
Durometer will be determined after I receive the shipment of tires from HOOSIER. I will take the lowest duro reading off all tires and that will determine the number of what it will be
Mandated mim. pressure starting Thursday 12 LR...16 RR....at end of each race.
(If needed we will up that pressure on Fri. night. Must run same tire you start the night with.
2.4 Max Ecotec/Durotec/Honda/1000cc engines:
NO PORTING or POLISHING of Cly. head
Aftermarket rods, piston, cam OK; Must have stock head and engine block No mix-matched block and heads.
Stock Crank, Bore and Stroke
Focus only: 2.0 engines head work allowed. Must have stock crank and stroke
ALL chain drive Motorcycle engines must have clutch and all gears in transmission
Weight:
Lightning sprint - 1000cc-940 after race with driver..1200cc-1040 after race
D-2 Midgets - 1125 after race with driver
166 Midgets - 1150 after race with driver
Tire rule: RR tires will be durometer and must not read under 40 before or after any race.
All 166 will be what a new SP-4 is 65-68 (see above 166 )
NO incockpit adjustment of anykind except (manual brake valve ok)
These are the rules for the 2015 GDN with NO (ZERO) flexibility