Wow! Those are some neat pics! I'll bet that any blockage at all helps
keep the air flowing the down the side of the car smoother..
The massive hole above my wheels is exposed to the side air rushing by..
If it was high pressure air or low pressure air, it seems that either would
disrupt the air flowing down the side of the car.
I think just about anything would help this situation. But the scangauge is the final judge.