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Somewhere between the front of the car and the back of the car is the "biggest" part of the car. Think of the car driving through a carboard wall. The outline left in the cardboard is the "frontal area".
When you look at the car, pretty much everything in front of the biggest part of the car is pretty meaningless, except for the air going through the grill, and the wheel wells.
Everything behind the biggest part of the car is critical.
another way to look at it. If the air is "stagnant", it is high pressure. An example of high pressure is at the base of the windshield on older muscle cars = hood scoops facing backwards actually pick up better air for the carbs then those facing forwards.
i've been thinking about the air flowing through the front grill. There is a LOT of research showing all the air going through the front grill is pretty much wasted energy. You'd think the stagnant air getting relieved through the grill would lower resistance, but it doesn't.
Maybe I'm wrong. maybe we can all learn something.
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