Todays four strokes have gotten a lot better too, more power, more RPMs and bigger props. Some of our thinking is a bit off these days. I tend to go with the old rule of thumb and discover I have really over powered a plane, not that that's a bad thing!!!!!! I would like to see an honest torque test using the new two and four stroke engines to get a better handle on the power differences. Hear that RC Report!!!!!!!!!!!