FYI for comparison, I have a 150SS on 1090 pipes, 6350 on the fuchs 32x12, 8th gallon, 100 degree heat @600 MSL. I am going to pull it off the plane and throw a 157 on the pipes to see how it does. 6050-6100 on the 3W 3d prop. I sure do like how the 157s look, nice casting on those, cant wait to try one myself.