I haven't checked my asi accuracy.
I was also wondering about increasing pitch a little and keeping the engine at a lower rpm for longevity. The old prop wouldn't let the engine rev past 2800 and it has been trouble free for 570 hrs.
I just hated the noise and vibration. I wanted a longer prop because I'm more interested in stol capabilities than speed. I will look into the tip speed efficiency info. Maybe I should limit rpm to 3000.