Quote:
Originally Posted by Lee Stewart
Originally the Pontiac RAIV 400 did not get it's name from a sequence of RAII then RAIII. Initially Pontiac engineers wanted to offer real ram air for the 1969 GTO. So they "borrowed" a page from the Olds engineers with their 1967 W30 RA setup and went one better.
The proposed RA setup was to have two outlets behind the front grille and in addition, the two hood scoops. 2 + 2 = 4. . . RAIV. But in the interim, they beefed up the 400 a little and called it a RAIII. When the 4 inlet RA setup was not approved, then it became part of the sequence. If it had been approved, there would not have been a RAIII.
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I tried a similar arrangement for Chevy pickups during my stint in vehicle development.
It didn't work.
We couldn't figure out why, until we "smoked it" in the aero chamber. The air was going in the outboard side of the inlet and then coming right back out the inboard side of the inlet, without going into the ductwork.
Aero is sometimes very non-intuitive, which led me to state "...you never know until you smoke it".
K