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Regardless of intake design, you just can't build positive pressure in the intake tubing, even if it's one of those foot long hot air intake things (meaning you certainly can't in our maze of piping). You can't do it at high speed, and you certainly can't around town. Any car you see with a forward facing hood scoop is pretty much guaranteed to be useless. The closest thing you can do is build a cowl induction in front of a high pressure region (the windshield...think old school Camaros), but even then you're not getting ram air, just canceling out the low pressure you'd otherwise have at the intake. To go a step further, motorcycles have absolutely terrible aerodynamics, leading to high pressure region in front of the body, very disproportionate to anything a car generates. Even they aren't able to generate any ram effect until >100 mph, and even then it's barely noticeable. The moral is, always go with cold air over "ram" air. Nissan was nice enough to put the intake out front, so despite the ugly plumbing route we still fare better than the ricers with their mini rocket launchers under the hood.
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17:55:27 07/19/08
