Well I am not going to get too technical but my 1518 is a great motor in my Revo. Feels a little lethargic on 4S but wales right up on 6S. I would hate to see what it does on 8S on which it should be capable of running. If you gear it for 40mph on 6S I think it will run very cool indeed. My Revo is geared for 62mph on 6S and even then the 1518 doesn't get all that warm really.