Carburetor scoops do they make a difference?

Interesting clip I saved from a forum about scoops on cars at Bonneville.

The formula for theoretical maximum ram pressure ('velocity head') is:
p = pv²/288g, where
p is the velocity head in psi
Þ is air density in lb./cu. ft.
v is velocity in ft/sec. (88 ft./sec. = 60 mph)
g is acceleration due to gravity, 32.2 ft./sec/sec. on our home planet

So for example, at 150 mph (220 ft./sec.):
p = (0.076 x 220²)/(288 x 32.2) = 0.4 psi (~11 " H2O), or about a 2.7% potential power increase.