It's worse than that since those of us with electronic ignition
systems see a lower peak EGT by 80-100 degrees.
I think you should talk to George Braly about 80 degrees rich of
peak. He might suggest that you are playing with adverse cylinder
pressures.
Scott Krueger
AKA Grayhawk
Sky2high@aol.com
II-P N92EX IO320 Aurora, IL
(KARR)
"...as we know, there are known knowns; there are things we know
we know. We also know there are known unknowns; that is to say we know there are
some things we do not know. But there are also unknown unknowns - the ones we
don't know we don't know." D. Rumsfeld
PS, I put my probes in the suggested 4" from the cylinder location for
"absolute" comparison purposes.