The Kv stated on that is 235 which is a little higher than the Axi I mention. My Pletti has the same and I love it on a 21x14. Amp draw is high on static but in flight average is fine. Sounds like tewalker01 can help out with some other props to try. Definately, try something with more pitch to help your speed over the tops of maneuvers. Most are running 14" pitch and using diameter to control amp draw.