Mailing List lml@lancaironline.net Message #70693
From: Tom Thibault <tom@lachollatech.com>
Sender: <marv@lancaironline.net>
Subject: RE: FW: S a v v y Analysis of oil cooler temps
Date: Mon, 15 Sep 2014 11:20:31 -0400
To: <lml@lancaironline.net>

Bill B said:

Things look somewhat normal except for Oil Temps.


Wow things look wrong to me.  Why is EGT 1 acting so squirelly?  It goes from 1330, at around 400', down to as low as 650, then up to 800 for a little while.  Then it jumps instantly 300 degrees while level with RPM, MAP, and FF all constant.  After that EGT 1 is in line with the others.  EGT 2 seems somewhat lower than the others also but not as gross as EGT 1.

I think your oil pressure regulator might be set too low.  Mine is about 69 PSI at idle, will hold just under 70 PSI at 190F all day long and is closer to 85 PSI during takeoff with the oil at 100F or so, and climbing of course.

Was this a first run after cylinder replacement?  If so, it is sure different than the way I was taught to break in cylinders.  I was taught that on first flight, run the engine as hard as you can while keeping the CHTs reasonable, that is 400 or less.  The OAT was only 80F so the engine should have been able to take a high power run just fine.  The IAS and power setting seemed very low and the FF way too lean for a "break in" run.  I would have expected 15+ on the FF with 28+" MAP, ~2600 RPM and ~190 KIAS if the CHTs stayed 400 or less.  What does everyone else think?

Tom Thibault
N4XB, L360, 1200+ Hrs.

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