Ok, I'm still in new with the electric rc's. I just built a TC3 and 3300 6 cell packs. Right now i'm running a Reedy Ti 10x3 and i'm having problems with the gearing. I've read if the motor get's to hot to down size the gearing of the pinion, so should I add or remove teeth? what set up's are you guys running. I'm still useing 48 pitch gears. Also I just ordered a D6 7x1
what pinion are you running now, I would try a 20 tooth pinion, that is what I ran with a 9 turn, so it should work for you, ad if you are new, the drivetrain is prolly the prob, you should try to free it up alot, and also, if you are new, why are you running a mod motor
here's some numbers for ya to work with..
with a 72 spur.. 19 pinion = 9.47 final
20 pinion =9.00 final
21 pinion =8.57 final
22 pinion = 8.18 final
23 pinion = 7.83 final drive ..
also you can go to www.gearchart.com and print out a gearchart for future use at the track... Have fun ...