Quote:
Originally Posted by mugzilla
You have two things going...
Outside (cooler) air is routed to engine and improves performance at all speeds ...
The effects of "Ramming" (pressurizing) air are noticed at speeds over 150 miles per hour ...
I've thought about the pressure effect on radiator air flow but since the scoops are in the wrong area and really don't work ( At least the whiners say they don't) I've never worried about it .
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You are correct. I've seen published numbers that claim a one HP increase for each 7-10 degree drop in inlet air temp. Also, in magazine ads from 1970, Olds claimed that the W-25 hood was tested in a wind tunnel. I have no documentation to prove that it either did or did not help, I just present that information. I do agree that the cold air effect is far more important than any ram effect at normal speeds. That's why Olds called it Outside Air Induction and not ram air.