Originally Posted by madness

I have read the above Wiki guide for gearing. I do have a question, my car has a 1.83 final drive ratio which is very different of what most of the cars in the marketplace are using (mostly 1.9 to 2.0). Should I gear the motor to get less RPM and more torque to offset the rather high FDR of my car? I feel the car lacking punch with the current gearing I'm using for a 21.5 motor on a big track (leisure hours). Using a final drive of 3.7.

Originally Posted by RC Professor

Not sure how gearing influences motor characteristics from one car's internal ratio to another, but a few weeks ago I ran a Motiv 21.5 in touring with a 3.88 final drive and 48* timing with good results. My car has a 1.9 internal gear ratio. This was for a smaller track, and torque seemed fine. So, try getting closer to the high 3.8's in FDR and see how that works.