Quote:
Originally posted by ChevyHighPerformance:
The fresh air is sucked in at the base of the windshield. Because of the rake of the windshield (or lack of) a high pressure air pocket is formed at the base of the windshield as you move. The high pressure air is forced into the vent system. Hitting recirc closes this intake vent and opens a recirc intake vent to the passinger compartment which will stop this from happening. This is how cow induction forces air into the engine compartment. This is also why cow induction is less effective for aerodynmaic vehicles like Corvettes with a smooth transistion at the windshield base and a sloped windshield.
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don't you mean COWL induction?
I have seen a few cars with COW induction... It ain't pretty. Cows don't fit through small openings very easily.