One of the magazines got 1.4 hp on the tz3p but that was without taking the .1mm gasget out of the head, i ran my TZ3p last weekend at my local track and i was very impressed, granded out track is tight so the high end of the motor didnt really get tested but i had just as much if not more power than the guys with the nova based motors. I was very impressed with mine, by far one of the best motors i have seen for the money.