Greetings,
I originally installed a Sensenich 72x85 on my earlier RV-8, and later repitched it to 87. This was a stock Lycoming O-360-A1A from Van's, but with a Lightspeed ignition, and Ellison TB.
The FP Sensenich was just a few kts faster than a friends CS (same engine and mods), but of course wouldn't keep up in climb.
Below are some notes from my flight log:
10-25-01 / 1.4 hrs / 75.9 total
Did some cruise testing of the re-pitched prop. I made a N, S, E, and W run at 8500 feet, and 13 degrees C. This was at full throttle, mixture leaned for max RPM, which was 2720 RPM. The numbers are- N- 176 kt, S- 182 kt, E- 201 kt, W- 157 kt. This gives an average of 179 kts, or 206 mph for max cruise. Of course this is 20 RPM over redline.
10-24-01 / .2 hrs / 74.5 total
Installed the re-pitched prop, and took it around the pattern a couple times. Static RPM is now 2025, so I lost 75 RPM by going from 85? to 87? pitch.
10-12-01
Measured static RPM with the 85? prop. It?s 2100 at full throttle, and full rich mixture.