higher voltage and higher turn motors is the way to go....I have thought about going to 10s and 1515/2y in my converted Revo but wonder if it would be worth the price increase(new batteries, motor)and it wouldnt be for any more power I am about at the extent of using the power I already have, it would be about making the set up more efficient.....the setup would pull about 50-60 amps....:-)