brought next idea :
Had a Trans Am, scoop was reversed, facing the windshield, had a flap
that opened when MP increased. They claimd that the reversed position
was at the low pressure point at the base of the windshield hence
enhancing the rammed air effect. I don't know, it was cool, the scoop
assembly was attached to the engine so that on acceleration you could
see the engine sitting down on its mounts as the scopp popped open and
lowere ever so slightly.

Locating the scoop at the low-pressure point wouldn't do much
for ram-air effect, would it? I think the real idea would have been to
make sure the driver heard that thing sucking loudly so it sounded
like a real powerhouse

Got that right. lol