Justin: Looks like we are on the same page here. I just ran the engine, I used a "Zinger" wood prop 18X8 (Clarence Lee sais he got 7400) well I get 6400, bout the same you got: That was with "Morgan" fuel 15%. NOW !!! I ran some 20% I just purchased just to see the difference, and got 6700. I dont have a 17" APC but did try a 16X6 APC and got 9200.

So !!!!!!! the 6400 with the 15% certainly seem to "feel" like it would fly the plane O.K. however when it went up to 6700 with the 20% felt very different. It just felt better (I'm you know what I mean) just seemed to feel like its gonna crank this plane down the runway.

Might be a good idea to test fly with the 17"APC first



Denis