my EGT  probes are 1 1/2 " from the exhaust flange. The lowest that the
EGTs  run
regularly are around 1800. I think that these alarmingly high egts are  a
function of
the close proximity of the probes to the exhaust ports. Must  keep an eye
on the
headers when doing maintainance/checks.
Brian  Trubee


Three inches out from the port face is adequate distance for a bit longer
probe life and good temperature readings. A bit more homogeneous mixture
perhaps.  Probes on the bottom and close in are getting cutting torch
temperatures. The  three inches idea is from Daryl Drummond who has dynoed a thousand
or so  rotaries. And has many National championships to his credit.

That 2,000 degrees (if accurate) would be way too hot. Better would be 1600
 degrees at full power. Well rich of peak EGT. Then lean to 50 to 100
degrees  lean of peak EGT while still at wide open throttle. Further if you can
add  ignition advance and a CD system.

I used cheap probes and changed them out mid year. Plus carried a spare
everything EGT wise including a gage.

Lynn E. Hanover

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