Quote:
Originally Posted by freebeard
There's the answer to OP's question.
Your diverters and air dams on cars must use vena contracta to limit the air going into the underbody.
|
If you revisit the original video for 'Spirit', you'll see the effect with the smoke flow.
On centerline, the flow detaches to about 3" below the airdam, before it reattaches downstream onto the belly pan.
Spirit generates front downforce, and the airdam is the likely culprit.
It would have been the same for 'Spindletop' CRX, and the '64, ' screaming yellow zonkers ', Karmann-Ghia.