18T gearing

[Tazz]

I am running the mamba 6800 motor in my 18T with 13/55 gearing. Usually you want to have lower gearing on a higher kv motor so I would probably start with an 11T or 12T pinion and go from there.

I've run run 6800 3s 11-55 gear on large road coarse temps ok 160-180F ran same setup on good size carpet track temps closer to 200f. For speed passes in very big parking lot 16-55 others say they run 18-55 bashing type parking lot drag races with 6800. How you drive the car has alot to do with how much gear you get away with. every time you excellerate especialy from a dead stop they draw alot of amps and make alot of heat. The tall gearing mentioned was only used to make a couple passes drag race style then let cool. 16/55 gearing was used to run a very large oval pattern only coming down to 3/4 top speed for turns then back up for straight. 6800 seems kind of optimal for three cell. my friend has an 8000 great race motor for 6cell nimh, 7cell very impresive on track. 3s only seems useful for big oval or limited run top-speed passes. I believe castle said; aim to stay under 180F. 200F shouldn't hurt anything (pushing luck- not much room for error). 220F rotor loses magnatization-becomes innaficient-runs even hotter next time - and is realy close to cooking itself. Higher kv motors typicaly need lower gearing.