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1. 07:22 AM - Re: Oil cooler connections (speedy11@AOL.COM)
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| Subject: | Re: Oil cooler connections |
Peter,
I can tell you about my setup and you can take it for what it is worth.
I have a RV, not a Lancair, but the concept is the same.
My oil cooler is so efficient it is difficult to get above 185 in the summer in
Florida!
The key is to have a 12 row Warner cooler that is supplied with plenty of air and
an expansion chamber at the face of the cooler. Mine is remotely mounted on
the firewall and it is supplied with a 4.5 inch inner diameter fiberglass duct
that "aerodynamically" enlarges at the cooler face. It is important to slow
down the high speed air as it reaches the cooler face. That action increases
the air pressure on the face of the cooler. Higher pressure on one side of
the cooler and lower pressure on the other side is critical for proper cooling.
Your situation may be caused because the pressure is nearly equal on both sides
of the cooler.
I did not use Scat for ducting although it is a very suitable choice. For Scat/Skeet
duct you will need at least 4 inch - probably 5 inch is better. You can
always design a blocking plate (even adjustable from the cockpit) if you are
in cold climate and need to increase the temp.
I made my duct of fiberglass using a PVC sewer drain as the mold. I split it in
the middle and added baffle material to seal the cut and allow engine movement
in relation to the rigid oil cooler mount.
Thus far, I have zero problems with cooling - even when racing at Reno. In fact,
I could probably gain a half knot in the races by reducing the amount of oil
cooler air. But ... I like not having to worry about oil temp. That is one
less thing to worry about.
I have photos of my installation if you are interested in seeing them. I will
be home Thu night and could email them. Going to Sun n Fun on Friday - if I have
finished my exit air fairings and reinstalled the exhaust system.
Regards,
Stan Sutterfield
World's Fastest RV-8A
Daytona Beach, FL
I have dismounted the filter adapter and the vernatherm. Pictures attached.
I tested the vernatherm and it works within spec.
So what else can be wrong?
Valve seat, oil pressure...?
I am running out of ideas,
I am thinking about separate NACA ducts for the cooler in and outlet...
But on other Lancair it is not necessary... So what else could be the issue
?
Thanks in advance
Peter
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