Just to further drive Oil Pan's and Isaac Zackary's points about not enough exhaust surface area home is actually my own testing from years ago haha. I was googling and found it here.
http://ecomodder.com/forum/showthrea...-up-11471.html
Its basically a test of a horrible WAI I made. After 10 minutes of idling (which is only around 16 CFM!), I saw intake air temps of 65°F (15F ambient).
