I am trying to get to the most efficent voltage. You guys are a big help.

Yes all the given loads are huge factors but to start with a no load situation and then gear it to the correct amps using a watt meter will give you the best perfomance out of you motor.

People are always asking whats the best for "xamount" of cells.

So I wanted to turn it around and use the most efficent motor for a given voltage.

I know I need to figure in amp draw in the equasion becuase of battery limitations but need to keep it simple at first.


So the most efficent voltage for an 8XL would be 21.3.
The max amps on it is 74 according to the charts. That would tell me I should should for a 5s lipo that is capable of an 74 amp burst. That should get me in the correct power factor.

After that I need to gear the motor to keep it under the temp limit.

I dont want to get into winding resistance vs voltage loss I dont think it is neccessary for cars.

The only thing to remember with resistance is... to buy the lowest resistance motor your batteries can handle to keep the heat down (for cars).