Everyone has read about why CAI's work - lower temperature air means higher density of O2 which means more fuel can be burned. Blah blah blah, yeah everyone is so smart.

But what exactly going on under the hood? I can't be just a constant "hot" temperature? Turns out, of course it's not. In fact, sometimes, it cools down under there to outside temperature. And some times it gets searingly hot. Pretty much when you're sitting idle at a redlight, it gets hot. But when you're driving at speed, the air flow (depending upon the design of the car) can significantly cool down the under hood temperatures.

Anyways, here's some links to tests I found:

http://www.318ti.org/notebook/under_hood_temp/
http://www.318ti.org/notebook/under_...emp/page2.html

So... does this say something for adding exit vents on the hood and/or fenders?