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Posted for MikeEasley@aol.com:
I am as far from knowing what I'm talking about as it gets. My ES is flying
and maintaining good cylinder temps. I read somewhere that you should not
just cut holes in the bottom of the cowl around the exhaust exits, so I built
tunnels. I guessed on the size based on a couple things. I wanted about
double
the exit size as the entrance size (again, I think I read that somewere too).
The other ES on my field has fairly large exits and he's got too low cylinder
temps and has small covers to restrict the airflow around the exhaust
tunnels. Call me Mr. Scientific!
I did spend quite a bit of time working around every baffle panel where it
was attached to the engine and sealed it with red silicone. I had a huge
leak
between my oil cooler and the engine case. The baffle supplied with the
engine
is floppy and doesn't fit very well.
My #5 was about 30 degrees warmer than the other cylinders. I did some
research. Cirrus has a small hole in the front of the baffle on the SR22.
Some of
the Lancairs I've seen have a similar hole cut to allow air to get to the
lower fins on the forward side of cyl #5. See attached photos.
Make sure your oil door opening on the top of the cowl is air tight.
One other thing that I have heard of but haven't tried. Fill the hollows
behind the two front cowl openings so they don't create excess turbulence on
the
entrance air.
Mike Easley
Colorado Springs
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