Man, what a difference a prop change makes!

12,520 on an APC 11x6
13,540 on an APC 12x4

Still a bit rich. it went lean real fast with the 12x4 and I think I saw 13,750 on the tac with the 12x4 but it was way too lean. Hope I caught it in time.

Conditions today: 64 degrees 98% humidity (rained the last couple of days)

That 12x4 isn't going to be the prop for me afterall. I think an APC 12x5 would probably be perfect on a pipe. Now if I can get 13,500+ on the APC 12x5 and pipe, that will be quite beastly enough for me I'm sure.

Nice, inexpensive engine for sure.