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Date: Thu, 07 Aug 2014 16:17:47 -0400
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From: "pete@leapfrogventures.com" <pete@leapfrogventures.com>
Subject: RE: High CHTs on #2, TSIO 550
Thread-Topic: High CHTs on #2, TSIO 550
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You need to install a scoop inside the oil cooler to get the air around and=
 on the bottom back side of #2.  If you look closely, you will notice that =
the depth of the gap between fins at the horizontal sides of each cylinder =
is not symmetric.  It has depth between them on one side of the cylinder, b=
ut not on the other.  On #2, the zero depth side is up against the oil cool=
er, so no air gets around to the bottom.  I tried the blister idea some hav=
e used, but found the scoop to be far superior.  #2 is no longer my hottest=
, even on climbout - all cylinders are now within 20 degrees of each other.=
  I posted photos of it a few years ago, but can't seem to find my original=
.

Pete


-----Original Message-----
From: Thomas Whalen [mailto:thomasjwhalen@att.net]=20
Sent: Wednesday, August 06, 2014 1:20 PM
Subject: High CHTs on #2, TSIO 550

I have been fighting for over a year to try to keep the #2 CHT below 400 dg=
 on the climb. It has hit as high as 430. I leave it full rich and climb at=
 140kts. When I level off, I then LOP and then #1 cools off. I have the Lan=
cair baffles and RTV the gaps with the engine and have a good baffle seal. =
I even covered my 3rd intercooler and that only helped a little. Behind the=
 prop the baffle seals up to the top cowl but not down to the bottom. I hav=
e seen it the reverse of that as well. If close the oil cooler door the CHT=
 will drop 5dg at times.=20
This was a factory new engine.=20
Any suggestions?

Thomas Whalen
N444TW