Quote:
Originally Posted by Zeto
Functional how?
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NACA duct - Wikipedia, the free encyclopedia
Their have been many hoods with ducts put in place that cause more turbulence, yet these are fully functional because it let's in air for cooling while not causing the hood to lift at higher speeds... If a duct was put in place without a curvature (bulge prior and after) to help the air flow over the hood, it would still let air into the engine bay, but would also create drag above the duct causing the hood to lift or rattle...
The vented hoods are good for letting hot air out, but these are better for pushing cold air into the engine bay for cooling. I would still like to see someone put spacers at the hinges to see if the air flow in and out would drastically lower engine bay temperatures.