Bryan,
You can run the pressure measurement
tubing out of the cowling at the bottom where the cooling air exits and
bring the tubing up the side of the fuselage to the air inlet ducts that
bring cooling air into the cabin. Just tape the tubing to the side of the
fuselage with duct tape so it will not whip around in flight.
Bill B
From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of Bryan Wullner
Sent: Saturday, July 24, 2010
10:13 AM
To: lml@lancaironline.net
Subject: [LML] Re: My airplane is
running HOT
Too late on the tear apart.
I already made the plenum for the larger cooler and hoses. I
removed the old one and I am getting ready to re-install the new cooler. Should
be done on Monday.
I didn't like the cooler up front anyway. It was rubbing on my cowling
and damaged it. I wish I would have done this from the start. I wouldn't have a
big chunk of paint missing from my cowling. And because of the space I had to
use a 7 vane instead of the 9 vane.
If this doesn't help then I will consider having the carb looked
at.
As far as pressure measurements I don't know how I would get this done
without drilling holes in my firewall and I'd prefer not to do that as I have
it all sealed up pretty good. How did you do it on yours? how many holes
do you need if I do need to do this?
On Fri, Jul 23, 2010 at 10:39 AM, Chris Zavatson <chris_zavatson@yahoo.com> wrote:
I would suggest taking pressure measurements before tearing
the installation apart. The data will help determine the problem
source, heat generation vs. heat dissipation.
CHTs are primarily driven by EGTs (mixture) and cooling air
flow. The differential pressure test will verify air flow. Since
CHTs in cruise are good and reported fuel flow in the climb sounds low I
would suspect the carb itself.
I wouldn't expect any global CHT change by moving the oil
cooler, since the source of air and the volume extracted will
be roughly the same.
I do like switching to a larger cooler. If I recall,
you had some kind of space constraint that made it difficult to put the larger
cooler in the same location up front.
From: Bryan Wullner
<vonjet@gmail.com>
To: lml@lancaironline.net
Sent: Wed, July 21, 2010 2:08:42
PM
Subject: [LML] Re: My airplane is
running HOT
I'm
starting with the changing of oil cooler to a larger one and relocation to
engine bay with scat ducting to it off the baffling.
If that doesn't do it I will move on to the next idea.
My hopes are that my oil comes down and helps the cht's too. I also hope that
closing off the large hole in the front baffling from old oil cooler placment
helps with cht's
Bryan