[aerohead]

Originally Posted by Otto

Starting with a clean sheet of paper and aware of recent studies of car noses with air curtains, undertrays, etc., what would an optimized car nose look like?

In other words, how best to design a nose which incorporated and optimized such features?

I bought a copy of Julian Edgar's car aero book and have watched a number of his excellent YouTube videos, which show advances by Porsche, et al, such as the 996 which intakes ram air from the stagnation point and deflects it downward so as to form a wedge-shaped air curtain to fair the flow around the front wheels. He also bolted airfoils to the front corners of his car to serve as vertical air curtains to reduce drag, and comments that proper contour of such devices can actually produce some thrust, vs. drag previously.

Why wouldn't horizontal air curtains also be useful to fair the flow up and over and down and under the nose?

So, taking such new information into account, how best to redesign a car nose to reduce drag/increase thrust? What would such nose look like?

'Best' is a very subjective value. Can't be quantified.
What drag coefficient would you be targeting?