This thing has been plaguing me for months. I am sick of wiping the engine compartment after each session at the track.
I like Turner's solution. I have been thinking about doing the same thing. Seems like a simple, cheap and effective solution. I just need to go and measure the OD of the small hole in the cap, then order a T shape fitting (something like
this) and some tubing.
You can't see where the tube in Turner's car goes but it seems like the GT4 has just a long tube to absorb the excess fluid. I was thinking of getting a small high temp plastic bottle that the tube would attach to, and zip tie it inside the engine bay.
I will try to work on that and report back.