RE: mod motors in tc3
[link=http://www.rcuniverse.com/community/gearwizard.cfm]Skrappy's gear calculator [/link] will point you in the right direction. Put in the number of teeth on your spur gear and then try different pinions until the rollout is as close as you can get to 1. Higher than 1 is more speed - lower is more acceleration. Be careful of gearing too high - you may overheat and damage the motor and maybe the ESC too. Always check the motor temp regularly at first whenever you change gearing - you don't want a meltdown.