I was looking at this, including drawing C in the page that Aerohead mentioned, but after tuft testing the hood, there isnt an area that doesnt show attached flow with the upper grill block in place. So there isnt a way to suck that air on on my car without putting some sort of lip in front the vent, which seems it would be detrimental to overall aero. At this point it seems the rear radiator idea is still the best option for me, depending on this weekends tests.
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