Dan Luke wrote:

The bad news is that we were burning 15.5 GPH to get that speed.
What pwr & mixture setting? EGTs?

23" & 2300 rpm, IIRC. The mixture was 25 deg. ROP. Didn't check the EGTs.
I wish I'd looked at the CHTs.



Then something is wrong. At 23 squared that is 65% for me(IO-520) and
book flow is 13 gph.