Originally Posted by TopgunZ

Chuck, I would argue that since I am in Colorado and we seldom see 90+ degree days. However, even in the dead of summer I never seen my temps rise very much at all, but then again im running a colder fuel. Houston on pump gas could be very different.

But.. I have honestly never seen a need for an aftermarket radiator, for street use, on any of my vehicles. I had a twin charged 350z making extreme under hood temps with the top mount supercharger and the top mount turbo along with not 1 but 2 intercoolers plugging the air flow. I can honestly say that I never seen my temp rise at all.

Now if you are going to be doing autocross or time attacks thats a different situation.