Jerry,
 If we combine my water radiator and its big fan which you can't see, its
 on
 the back of the radiator with your FINNED, I am talking wide flat plate
 finned on a milling machine oilsump and cowl it forward out of the cowl
 maybe we could do both jobs. Just a thought, I loose my head every once in
 awhile. milo
 Won't cool the oil much Milo. Its been tried a couple of times and it is
 not worth the expense. Better and cheaper to make the oil pan a couple
 of quarts larger to delay the temp build up in the oil on take off
 where the engine is running full power. One of the problems is oil does
 not
 transfer heat to metal as well as water or glycol coolant so it needs
 a lot more metal area in contact.
 The inside of the oil pan is where you really need the fins and lots
 of them. Here is an old idea along those lines. Probably too expensive
 to make. Lots of air tubes through the pan.

 Paul Lamar


Paul,
Clever......
Interesting idea using an intercooler core mounted in the pan.
You know I use one of these to cool the oil on the R2000 yak. It  is very
efficient and the core's aren't all that expensive.
http://www.bellintercoolers.com/pages/lacore.html
$400 for a 10 x 10 x 3.5 tall core. could fine one cheaper, but the bell
units are very good quality.
I really like the "no plumbing" aspect of this.
Larry

Maybe that is the low cost way to do it. I had not thought
of an intercooler core. One advantage is there is no oil
pressure in the heat exchanger. Could save some space under
the cowl.

Paul Lamar