I'm using a dual Fluidyne core with shroud and Spal fan available from HRP World in the Modified Mag build. It's a nice compact unit. Using a Tilton differential pump to circulate the fluid and had Puddymod weld in the bungs for temp and fluid pickup in the rear cover when the diff was built. Using an AN adapter to return to the factory fill port on the rear cover.

This is almost the same setup I've ran on our Lexus Super Touring cars for years now with great results. Without the cooler the diff fluid (Motul Gear FF at the time) would overheat and the clutch type diff would be clunking by the end of a 50 minute race. With the cooler no more issues. Used the temp guage to determine when to turn the pump on. Wouldn't use it for qualifying for example to minimize electric draw.

Right now I'm trying to decide what to use the second core for, either fuel or trans. I'm probably going to go with fuel since the surge tank returns from the rail and then draws from the surge tank so there is potential for the fuel temps to rise substantially. Seems common in ALMS to run a small fuel cooler to help with this. Also with the fuel I don't have to add any additional pumps or the long run of plumbing to get to my rear mounted cooler.

Here's the cooler, it exits through the low pressure area where the license plate normally goes. It's fed by the open front driver/passenger windows.


Hope that helps.

Andrew

 

Thanks for your input guys.

Andrew thats a great idea. Do you happen to have pics of the pick up and return on the diff?

The car is being tested with the intention to participate in a 12 hour race. At the moment we have run the car continuously for as long as 45 minutes a stint.

The gearbox gets awefully hot during this time....