Quote:
Originally Posted by DocHaley
The problem here is people are talking about lots of different applications.
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If you are a regular joe that just has a car/truck/suv that is running hot in the summer, yes raising your hood 1 inch in the back will help the air escape. In fact if you don't believe it, simply raise it for a test, close the hood so only the rear 1 inch crack you created exists, start your engine and feel. You will notice the air coming through the crack even with the car standing still.
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That pretty much means nothing, especially if the cooling fan is on. Things change dramatically once it's moving. If what you said is true, cowl induction hoods would be fails. Since the base of the windshield/cowl area is a high pressure area, it is probable that air flows into the engine compartment at that point instead of out. If anyone cares enough about it to find out, a yarn tuft test should reveal what's going on.