Will wrote:
On Feb 12, 2:53 pm, "Dan Luke" wrote:
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.

Dan, that EGT value looks quite close to the "red box" value that John
Deakin teaches in his engine management course. Here's a link to his
latest article, which covers (or reviews, actually) the EGT/CHT
relationship. Good stuff here..




I believe he said the 23 squared was 65%. If so he is in the red box.
You want to be richer then 100 ROP or leaner than peak EGT.