Dennis; It is only going to make a difference if the cooling is limited by the oil
flow, and not the air flow.  I did not make the mod, and the oil flow is
more than adequate.  I would make the change only if you found that the oil
temperature drop across the cooler was more than about 40 degrees, and the
oil cooling was not adequate - or, I suppose, if you just felt like doing
it.  In my case I see about a 20 degree drop, but then I know my oil cooling
is limited by the air flow.

Al

-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
Behalf Of Dennis Haverlah
Sent: Thursday, August 09, 2007 3:48 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Engine oil outlet modification

I have been told that if I reroute my oil system by tapping into the front oil galley and eliminating the 2 - 90 deg. turns the oil makes going to the front housing I could achieve a 10 + deg drop in oil temp. due to higher oil flow and less friction.  This mod. involves tapping into the oil galley on the the side-iron that has the oil pump mounted on it. I am ready to try try this in the next few days.  Mark Steitle had modified his 20 B but does not have any test data on how well it worked.

Does anyone have experience with oil temperatures before and after the modification?


Thanks,
Dennis H.


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