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Old 09-17-2007, 03:54 PM   #23
Kirk
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Join Date: Jul 2007
Location: Texarkana, Texas
Posts: 959
Quote:
Originally Posted by Gerardo de Kort
Never cared for checking but do you know if they make quiet BOVs?
Sure, the stock BOV on my '01 WRX was quiet. Rather than blowing air off to atmosphere it would recirculate it around to the inlet before the turbo. If I recall currectly this helped to keep the turbo spinning too.

Quote:
Originally Posted by eric95
I guess when the throttle plate slams shut the air gets fired out the air filter?
The idea of a BOV is relieve pressure when you lift off the throttle so that the turbo keeps spinning rather than stalling as pressure builds for a second. It also keeps things from going over pressure when you lift - which might cause an intercooler or piping to break. I doubt you'd have pressure going back out the air filter, as to do that you'd have to get the turbo spinning backwards or something...
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