Less than 3000 watts continuously has been my experience with the 35mm crystalyte motors. If you do much stop and go or slower speeds than 20mph, then I would say you are already at the level of melting one. Get some FF, vent the case, and get a temp sensor in there and it will significantly increase your threshold and ability to run more power without ruining it. The newer cycle analysts have the ability to scale back your power when certain temp thresholds are exceeded. I strongly advise it if you intend to hotrod.