Oh, I forgot to say I have a DA header with a canister, I get about the same numbers with the stock muffler, but I get a lot more noise with the muffler.

I have it on a SD 260 Extra, and tried 3 different props yesterday:

Vess 22a ~7200 rpm acceleration was very good, climb good, straight and level it seemed under propped, very loud.

Xoar 22x10 ~7000 rpm acceleration was OK, climb good, straight and level very good, not very loud.

Xoar 23a ~6100 rpm, acceleration was OK, but not as good as the other two, climb very good, straight and level good, very quiet, about as loud as a .40 size sport plane.

I surprised myself with the 23a, I almost didn't fly it after the low rpm ground readings, I think I like it the best though I think guys flying IMAC would pick the 22x10.