Not Ranked
So Morris, it seems your middle close-up pic of the front of the hood scoop shows the yarn flowing INTO the hood scoop opening.
Too bad there hadn't been a few more tufts in front of the hood scoop opening.
And I would suggest about the side vents:
1) yarn placement as shown in the pic doesn't necessarily say no air is coming from the vents
2) the movement of the boundary layer along the side of the car at speed would be sufficient to draw (venturi effect) air out of the vent and given the air is hot and less dense would simply blend easily with the boundary layer and would not look like some kind of jet blast coming out of the vents.
3) a better test of the air coming out of the vents would be a smoke generator inside the fender or at least yarn place inside the vents to confirm the air flow.
4) keep in mind the bulk of the air exiting the engine compartment is down and under the car.
Just thinking.
Cheers
Greg
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