I am no expert in the location of exhaust probe tips, but ....

If you take the APS seminar, you learn that the absolute value of the EGT
doesn't matter.  What matters is where it peaks.  In other words, the most
important issue is not what the peak temp is, but how far rich or lean of
peak that cylinder is.

Suggest you do a GAMI lean test to see where each cylinder peaks.  If the
spread is close enough, you can run lean of peak.

D. Brunner

-----Original Message-----
From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of
Greenbacks, UnLtd.
Sent: Sunday, March 30, 2014 10:38 PM
To: Lancair Mailing List
Subject: [LML] Re: EGT Probes

How far into the exhaust pipe should the EGT probe tip be positioned?
When reinstalling my repaired exhaust pipe at KBQK, little attention was
paid to the tip locations for #2&4 probes.
This may be why I observed significantly different EGT temps compared to
previous 'normal' flights.
Does this make any sense? I would have thought that the distance from the
exhaust valve to the probe tip would be the controlling factor.

Angier Ames
N4ZQ
Up to my eyeballs in 1st annual.



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