S a v v y Analysis of oil cooler temps

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From: Tom Thibault <tom [at] lachollatech.com>
Sender: <marv [at] 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 [at] 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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