Quote:
Originally Posted by Frank Lee
*Outlet area should roughly equal inlet area. If you know that value, it would probably make a decent baseline.
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I am pretty sure you want the outlet to be around twice as large as the inlet (or maybe it's 50% larger, I've seen this somewhere). The exiting flow has less velocity, so it needs more room to escape at the same rate. You need the extra space so it can move the same volume of air as is entering.
Quote:
Originally Posted by 1.5Ldave
You could try what Ive seen some turbo cars do for cooling. Just use some washers as spacers to lift the back of the hood up near the windshield. Not sure if it would mess with aero or help it. Only a few bucks to try it though, and if nothing else its a windshield wiper block.
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That type of hood venting is primarily used for drag and drifting cars. It's great for allowing a lot of heat to leave the engine compartment... when you are not moving. Drag cars sit a lot and drifters are sideways at low speeds / high load most of the time, neither situation is helpful for moving air through the engine bay.