well the engine has MORE power and it got extremly hot so i richend her up some, ran another tank still had more power about 1k more unless my friends tac is bad but i did try 15% instead of 10% nitro so what ever. lol becarfule with pulling the head of a TT after it is seated in cuz its a tight fit you will pull the sleeve out. lol it happend to me so while i had it out i inspected it, looked great was nice and slick piston was oil tinted like it should be so i figured it is ok. i will know next time i fly if it flames out on me but she will be aircooled so i dont think its going to be a problem, after all how could the beauty of a engine that TT.46 cough on me. lol thanks for the advice and comments guys. BTW mk it was ground tested and it gains plenty of power in the air it leans out to peak at about 150 ft so its tuning is fine or was fine with the other fuel she smokes alot so its rich enough