After reading some more from the archives and receiving responses like yours
I'm beginning to believe that I don't really have a cooling problem. I'll
just keep an eye on it for now.
My EGT is still really high (around 1550) and as suggested earlier by
another group member it's likely caused by probe placement in my Forsling
stainless steel exhaust. I wonder if it would help if I were to remove the
probes bend 45 degrees and re-insert bent away from the cylinders?
Clay
----- Original Message -----
From: "Bruce Georgen" <bgeorgen@peoplepc.com>
To: <rebel-builders@dcsol.com>
Sent: Sunday, June 11, 2006 1:53 PM
Subject: Re: [rebel-builders] CHTs
Clay,
I have the fiber glass cowl and one of my my CHT temps runs 420 all the
time above 2500 RPM. I understand your exite air should be 150% of the
inlet. Walter reduced his CHT's by enlarging his inlet after having
enlarged his exite without good resolts. If your oil temps are good I
don't think your 400 or 420 CHT is all that bad. Glider Tow planes run 450
CHT all the time without any problems. I have 200 hours and my cyl.
compression has not changed. Lycoming says 450 and below is OK. 500 is
max.
Bruce
-----Original Message-----________________________________________From: Clay Smith <cbsmith@nf.sympatico.ca>
Sent: Jun 10, 2006 7:52 PM
To: rebel-builer glass cowlders@dcsol.com
Subject: [rebel-builders] CHTs
Hi Guys,
I have some concerns about my CHTs still being a little too high on high
power settings (above 2500 rpm) even after 5 hrs on a rebuilt 0320 with a
metal cowl. They run around 390 and as high as 420 on # 2 which is the
front pilot side. Oil temp is good around 185. My guess would be that
the bottom exit open is not big enough. So, my question is which is the
best way to correct this? I could cut back (actually cut forward) the
bottom cowl metal to make a bigger opening (I do have a lip on the bottom
trailing edge already) or, maybe I could place some kind of grill openings
further forward? I'm sure some of you have already gone through this and
may have some advice. I did block off the oil cooler scat hose input on
the rear baffle some to increase the oil temp and this did seem to lower
the # 2 a little, but not enough.
Thanks for any help.
Clay
C-GZZO
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