Originally posted by zachzachz
With a stock motor make sure your final gear ratio is pretty high. Too low and you'll work the motor way too hard.
Haha, 10:1 on a TB01 is slow as a turtle... Tamiya gives 16t pinion in the rally TB01s as they are supplied with knobbly rally tyres. On the road TB01s, they get 19t... which is slightly better.
Stock RS540 motors can pull a pretty high gearing; they don't rev very high so the only way to get good speed is to use their good torque. So you gear Up (motor turns less for each wheel turn).
On a smaller track, can try about 7:1. (gearing "Up")
On a larger track, can go closer towards 5:1 (gearing "very Up").
On the weekend, was at our local track (very large) running 4.8:1 (gearing "stratospherically sky high"!!
) and it had pretty good speed. It was a pretty spot on gearing for this particular track as the motor wound out (reached top revs) on about 50% of the lap, and was singing by 1/3 down the straight. Good fun! Motor was not very hot on this cold day, I ran it 4 packs in a row without resting longer than a battery-swap.
If motor is "overgeared", it will bog down and get very hot.
Don't try it with your stock and mod motors. You will kill them fast.