Quote:
Originally Posted by dragoontwo
I'm not an aero expert, but at interstate and above speeds wouldn't it become pressurized? The intent is to vent from the engine compartment correct? On a stock car, there is significant pressure in the engine bay that causes the hood to deflect upward at higher speeds.
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Yes it's "pressurized" but it's not as simple as that. The vents will provide some release but it won't fully release the high pressure zone through the side vents the same way hood vents will. Also speaking of hood vents threes a reason they need to be in a particular area in the car to maintain effectiveness. They need to vent in a low pressure region otherwise they would intake vs exhaust. Wicker bills also aid in creating a larger low pressure region to increase their effectiveness. The fender vents will only flow whatever the low pressure region around it will support.
The stock hood is just flimsy aluminum, you're talking about a larger surface area for the pressures to act on. Hence the death rattle.