[hyperasus]

I have also been confused about RPM ratings on these brushless motors. You say 40,000 rpm is the rule of thumb. Does this mean it is best to find a gearing/kv/voltage combo that puts the motor at 40,000rmp with max throttle? Or is running the motor at less then 40,000 rpm just as good(or better). If running at less rmp then how much less is acceptable before the motor is running with too little rpm to be efficient.

Another thing. Most brushless motor talk and "rules of thumb" have been for motors used for larger scale trucks. What about S can sized motors. In general it seems that the smaller the motors, the higher the kv. So does this mean that a smaller S can motor would be more at home at say 50,000rmp? I've looked threw the forums trying to find info on this and didn't come up with much. It would be nice to have better "rules of thumb" when selecting a motor for a vehicle. Maybe some kind of chart or calculator that takes your trucks weight, wheel weight, voltage, speed you want it to run at comfortable, or whatever information is needed and tell you the best motor size and kv that will best work for that particular vehicle.

Right now if someone comes onto our forum and asks, "which motor for my stampede?". He would probably get several people advising him to get a 4200~5300kv motor. Or at least....thats the advice I got when I started out. Yet threw trial and error I've come to find out that is WAY too damn high of a kv rating and will run smoking hot in my pede. There has GOT TO BE A BETTER WAY to determine which motors will run good in a specific vehicle and not have a meltdown.