With the motor holes tapped over the E-revo was like 110*-130*f (24/58) on a 50*f day and the Rc8t was like 130-145*f (16/58?) and climbing slow depending on driving style on a 72*f day. I did not change the gearing from 4s to 6s and did not see much change in speed and acceleration. My 3.7ah 25c 3s lipos are stressing to keep up. They were warm at 109*f and I only used 1300mah out of them.