what motor and battery to get

guys need help on getting a motor and lipos.i had tryed some true rc batterys
and burn up one the other day.one of the guys here said i needed a battery
with a higher c rating than i had.my batt c rating was 40c 10c and 60busrt
and 15c said it was drawing to many amp.useing it on a fegio i know fegio
are junk but thats what i had at the monment.thinking about the mudusa
36-60-2000 motor.one of the guys said here that the 70mm is better.
i khow the can is longer ,will that make it run cooler thank.