Originally Posted by
da_John_wee
waht you need is 45-52T 64P pinions. and gear your car for 170F or below after a race
but not sure if 120 spur will fit with those pinions, I think you should get a spur adaptor or new center shaft from
www.skyrocketbatteries.com/ to fits a 108 spur gear.
Yeah, I ran a 108/44 with a 17.5 sp and sxx tc profile 10(+5deg timing) today for about 6 mins. The motor was at 143 deg after the run. Car felt fast but still well under the temp. Just throwing it out there for shats and giggles.