On my bug - 78x103 - I have a Mocal 180 degree oil filter tstat. Basically when the oil reaches 180 it heads for the 2 oil coolers I have mounted on either side of the transmission. I have fans mounted to the coolers that are thermosatically controlled. When that oil reaches 210 the fans kick on until the oil is back to 180. I got the mocal oil tstat and fans from
http://www.batinc.net/.
The coolers came from JC whitney. The wiring kit and thermostatic sender came from Jegs ( or summit ). The inline T fitting to hold the sender came from the hardware store (my fabrication).
the oilstat goes on the oil filter location and your oil filter just spins on to it.
I'm also running the stock oil cooler on a DTM. On the highway at 20/30 minutes +/- 100mph the oil temps were crawling over 210 (with both coolers) until I added the fans.
Pics ?
I can provide 'em !
Dan