Originally Posted by
vinsedprince
i just got my mamba esc and 7700 motor.
overheating problems...
19/61 would still make my esc like a toaster.
i'm planning to get lowest pinion. and highest spur gear possible.
if need to use an adapter for different brands...
any suggestion what parts to use?
spur gear adapters works with tt01?
Reedy's 3-star was a 7700kv 6.5 Turn brushless. The manual said to gear touring cars at 8.2 for long tracks and 9.4 for short. With a 61 spur that would be a 17-19 pinion, and most guys gear faster than what the manual recommends.
You are in the right range, if you are that hot you should probably check for binding. It won't take much, I had a shim in the rear diff to move the diff pinion away from the bearing and it was rubbing too much against the diff spur, charred my silver can wires and temped at 190+ degrees at 5.7 fdr; took out the shim and the motor was about 130 degrees at 4.8 fdr. This weekend ran a 8.5 turn at 7.9 fdr (20/61) and it didn't get hot.
You need to go custom with a spur much larger than 61, the gear cover will get in the way and you'll want more of a slider for the motor with the smaller pinion.