Thanks all for the good input on this one. I will try mounting the sensor relatively close to the exhaust port where it is mechanically convenient for the mounting adapter that RCATS supplied.

John ... on your question, I had not assumed that absolute values were dependable/meaningful ... figured that if I used it to tune, I would set it on the rich side of peak EGT a la fullscale. For the most part, I have been pretty successful tuning by ear and tach, and backing it up with sparkplug inspections .. so this is additional data. Should be interesting to see it vary across the RPM range in real time via telemetry though.

Dave