[jaykay]

Yes...exactly this is why I had envisioned horizontal "liner louvers" oriented/exhausted downwards so as to interact cohesively with the wheel rotation air...maybe there would even be a coanda effect to be had there! I would image that exhausting downward out the wheel well couldn't be any worse than in front of the wheel

This arrangement would prevent undue damage debris ingress to the back of the rads.....so I was curious as to what had been done for real on let's say a cup car. There's no easy way to test effectiveness without proper resources...so