Newbie in need of help again please.

[Plumb25]

Ive got slight confusion over pinion gearing if it has lees teeth does that mean more acceleration and more teeth more top speed.Please help.

Thank you

[raemin]

That's correct as long as you remain within the motor overall ratio. If you use a to big servo the car will go slower hatever you do and you will "cook" the engine.

As a general rule, the hoter the motor, the smaller the pinion to use: a low turn motor revs more but has less torque, hence the need for a smaller pinion which will allow the engine to reach its max power.