Hi Paul,
We often see a 200 degF difference in EGT's, sometimes more than 250
degF when the throttle is closed in flight. We attribute this to the
proximity of the front exhaust headers to the two inlets in the cowl.
Our engine instrument was set to alarm if min/max EGT difference was
greater than 250 degF, and we were getting alarms regularly on
reduced-power descents.
Our cooling mods don't have much effect on the EGT spread,
front-to-rear, but were done to reduce the rather high temps (400-450
degF) in the lower cowl area, which was causing damage to various
components. The mods also ended up reducing oil temps by about 20 degF
in the climb.
Regards.
Terry Seaver
-----Original Message-----
From: owner-europa-list-server@matronics.com
[mailto:owner-europa-list-server@matronics.com] On Behalf Of Paul Boulet
Subject: Europa-List: rear cylinders HOT on my 914
Hi All;
I've put ten hours on my Europa to date and seem to be getting pretty
high EGT readings on the rear 2
cylinders- generally running 200-240 degrees hotter than the front two.
I searched the archives to see if this issue had been addressed before
and can't seem to find any info hence hoping others might give me some
insight.
Steve Hagar was kind enough to give me this info:
"For hot rear cylinders part of the fix is to partially block off the
gill vents on the rear side of the upper cowling. The idea is to not
have the air rushing out those holes but down over the cylinders in the
rear and out the bottom. Along with that is to make a cover to go over
the top of the motor mount weldment at the rear of the engine. You want
the air forced down over the cylinders. You don't want it to go to the
back of the engine compartment and go rushing out the bottom through
that motor mount opening. Dave Deford and Terry Seaver up outside of
Livermore have been through this."
Any other thoughts/opinions appreciated. By the way, the day was a
balmy 75 degrees F when I was test flying. Thanks!
Paul Boulet, N914PB, Malibu, California
"Have flown ten of the required 40 hours off in my designated flight
area"
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