it runs beautifully on the street\highway all year long. Drag racing doesn't stress the cooling system hardly any. However when road raced it the temps would start to rise quickly. I've auto-xed the setup with no issues either. Its the warm road race tracks that ruin it. I even have my hood vented to help. However, I still love my e-fan setup.
My Z32 won't be seeing a road race track anytime soon!