My thought was a T fitting in the line close to the cooler up near the front of the car. I would have a remote cooler in a box on wheels with 2 flexible lines that I could connect. Then use a small pump to pump the cold fluid in and the hot fluid out? Or just circulate the existing fluid with a small volume 12 v DC pump?

Anything to keep it cool will help I am sure.

I wish I could be at the exact same temp every time i get in the water box, but in 15 years of racing that doesn't happen many times.

Allen