2 questions: Was the torque shift ported, SS, high rake, cupped? The Turning Point Hustler is alum with thicker blades and that will cost you. The Turning Point Hustler is ported. If you were not running a ported prop you may be experiencing one malfunctioning. Malfunctioning ports allow air across the blades when you don't want it over them. like after the hole shot and when you are attempting to peg your speedometer. Air across the blades, decreases the density of the water and your prop slip jumps from something like 12-15 to something like 25-30 for a set of numbers. Crank that into the www.go-fast.com prop slip calculator and you can see what difference it makes between your theoretical speed and actual. here