For the Losi truggy it's plenty. These chassis are very efficient at putting the power to the ground and don't seem to need as much horsepower. I race at a local club level and some RC Pro races. I'm not a national caliber driver and don't have the mega power engines. I want to try a high powered engine this year, just to see what it's like in the T. It seems like the T can handle more without getting all out of control. Plus I have the Mach if I feel I need a ton of torque. Just don't use a JP-1 pipe. WAAAY too much bottom end. It's almost uncontrollable. The Mach engine needs a pipe that provides more top end. FYI.