Originally Posted by
Capt Lou
Guys: Thanks again for all your suggestions. The final result is that I put an APC 16x6 and it turns about 9,000 RPM's. This will now be the solution for my 1.25. I also tried a Xoar 17x6 put it did not improve the situation, only turning about 8,000 RPM's. I hope this info helps someone else. Again, thank you all
The 17 X 6 @ 8000 will make slightly more thrust than the 16 X 6 @ 9000. If you have a low drag airframe, I would use the 17 X 6 as it leaves you more RPM for speed once the prop unloads in the air.