"Thomas Borchert" wrote in message ...
Doug,

Thus you have found 100 or so degrees rich of peak without
ever having to run the engine at peak (which is too hot and hazardous
in itself).


Come again? That part in parenthesis is completely wrong.

--
Thomas Borchert (EDDH)


Thomas, I think you snipped away an important part of Doug's post.
He was trying to stress the need for leaning to a temperature limit.
Stainless steels approach their softening points above 900C (1650F).
Doug's "too hot and hazardous" remark referred only to the peak EGT
reached at a high power setting, where the peak temperature is high
enough to enter the softening region of the exhaust collectors.
Doug's advice about never leaning above a safe temperature
is well advised, and it's exactly what I've followed for 25 years.
In fact, I found that leaning to RAM's recommended 1550F
still results in a little exhaust-system distortion, and I've held to
1525F max for the last ten years or so, with better results.