[jhautz]

Are you disapointed with the lack of top speed or lack of power?

More top speed... Go up one or 2 on the pinion or down 2 or 3 on the spur.

More acceleration... Go Down 1 or 2 on the Pinion - or Up 2 or 3 on the spur.

If anything stars overheating, go back a tooth or 2, you have reached the limit.

According to my calculations the setuo you are running should be around 37mph top end. If you go down to a 14 tooth, its around 33mph. Up to 17 tooth, around 40mph. Although you are probably reaching the limits at 70/17 if you can run it there without overheating.

I have a emaxx w/ the same motor and esc. I run 66/16 (Almost the same ratio as 70/17) and its about all it can take. I have to run a fan on both the motor and the esc to keep it cool. Mines pretty heavy though. It mign not be as bad if yours is lighter.