220 is great if your getting your full potential of power. is it accelerating quickly and hitting that second gear??? is there alot of fuel coming from the exhaust, if yes, then that's awesome, but sounds to me like you may want to lean it out about an 1/8th of a turn and see if your performance goes up, temps may go up a little, but i think you'd be ok with that engine. just mess with your high speed needle at this point.