4 or 5lipos ?

[starscream]

Originally Posted by big greg

turning the epa down is nonsense huh? have you not read my post? all it is doing is limiting your motor speed when running higher voltages, my speedo ran no hotter when i turned it down from 125 to 90, shoot im gonna buy a 6s and leave my gearing the same with the epa at about 70, just to do it

I don't believe it's nonsense as partial throttle is hard on the ESC. There are reasons why they make different types of ESC's for cars, boats, planes/heli's.
You would be better off gearing down but the EPA is an option, just not the best option.

Higher voltage is always more efficient but you need to have the appropriate wind motor and gearing.
A 5S 4000mAh pack is equivalent to a 4S 5000mAh but the 5S system will run cooler with the appropriate setup
A 6S 3200mAh pack is equivalent to a 4S 5000mAh but the 6S system will run even cooler with the appropriate setup