[my427cobra]

I should have also said the angle of the vanes in the vent also contributes to the venturi effect and how easily the air blends into the boundary layer.

Without the vanes, just a big hole would not be effective in sucking air out.

But great pics Morris.

All help in getting to the answer.

I'm going to do a similar test when I get my scoop mounted.

I'm also planning a static tuft test using 3 large box fans in front of the car while at rest.

Then of course a moving tuft test,

Cheers
Greg