Quote:
Originally Posted by azjc
With higher voltage you can run a lower KV motor and this setup will pull less amps meaning less heat than a lower voltage and higher KV motor, and since your motor is pulling less amps with the higher voltage setup you can run a lower capacity pack to get the same runtimes. Your motor will pull a certain amount of watts all the time, Volts X Amps = Watts, the average 1515 or XL size BL motor will pull 1500 watts, if you want to compare different setups you can divide the 1500 by the voltage amounts and this will get you in the ball, park there are other variables Gearing, weight of vehicle, wheel size.
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Right on. Plus the lower Kv motor will have more torque. This concept is true with brushed and brushless. The more turns you have the higher the torque. The less turn the higher the Kv. Most people usually runs HV for speed runs mainly because of the added bonus the HV provides for high speed runs. If one has a 100A 12S controller and he runs at the AMP limit, he'll be getting over 4000 watts of power. Now if he wants to race and changes the gearing for around 40mph, I'll bet he'll only see spikes of maybe 80A and only on hard acceleration, but he will average around 20A or so instead of 50A+ with less voltage.