All my gas engines are 3W. I'm in the process of stuffing my 3W50i in this plane. The rear induction is a little more time consuming than most but they produce more power. I had to cut through the second part of the engine box due to the velocity stack I have on the carb. Not a big deal, just a little more work. It should pull this plane along very nicely. It came out of my Dave Patrick 330L that flew well with this engine.