Teeth on pinions

[julesbristol]

Sorry for the potentially incorrect language. I have a TT-01 car and I want to know what is the fastest combination of teeth to go on the pinion on the end of the little motor shaft, as well as the ideal motor (in terms of turns).

I.e. a 21 teeth pinion thing with a 15 turn motor...

Hope someone can help. I have loads of different pinions from ebay and several motors.

[sosidge]

Larger pinions give more top speed. Motors with fewer turns are faster. However, overgearing a fast motor will just cook it, so don't go crazy with either the gearing or the motor. A 15-turn is a good all-round motor that isn't too hard on the car or the electronics.