Not Ranked
I personally don't think much air at all gets in through the scoop, AT SPEED. Because of the boundary layer issues. AND, if it did, you wouldn't want it because the force of the air, again AT SPEED, would mess with the fuel entering the venturi, and not in a good way. That's why good ram air systems have built in baffles and shelter the venturi from the airstream. At lower speeds and idle, I really think the major benefit of the hood scoop, assuming it's open, is as a heat exhaust.
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