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N7ELA
01-04-2009, 11:59 PM
What gearing should i run on an 8.5 turn motor. Spur is a 78t. Was thinking of a 21 or 22 pinion. Anyone got any advice...?
Andy Moore
06-04-2009, 07:54 PM
What gearing should i run on an 8.5 turn motor. Spur is a 78t. Was thinking of a 21 or 22 pinion. Anyone got any advice...?

That sounds about right, it puts you at a 9.xx:1 final drive. I would do a little checking of the temps to make sure though.