OK, here's the plan...
One of you guys needs to buy one of the aforementioned "hypercars" and drop in a honda civic engine to test this heat exchange/CD relation
Then after we determine that, we can go about covering intake/vent holes to see how they impact the CD.
And we can do A-B-A testing with removing all downforce generating aero mods to see if it makes the CD better by getting rid of the drag associated with parts that create downforce.
Problem solved, and we all become a whole lot smarter
~C