[E-Revonut]

Unless the fan is on all the time I wouldn't worry to much about the esc, the fan is doing it's job, just make sure the fan comes on at start up everytime so you know it's working. Also because your tires are slightly bigger and heavier I would have to recomend dropping a tooth or two on the pinion, that will definately help the esc, and may help the motor a bit too. I think the brushless MTs all come over geared out of the box, gearing for over 40 on 4s is a lot!