Quick question....I have heard a bunch of different BOV's and the noises they make. How come some give off a Pshhhhhhhht sound and others sound more like a pssssst (whistle) sound? Which ones are which? aka brands

 

bump for an answer

 

brands and psi

 

Is it the higher the PSI the more of a whistle?

 

That depends on the brand. I guess it would be easier if you let everyone know what sound you're looking for.

 

I like this brand, sounds cool Check out the link

http://videos.streetfire.net/search/...62DAE06131.htm

 

it all depends on the design of the outlet flange.

the HKS SSQ has a tri-fin design which induces a whistle sound. the outlet is very tiny, so the velocity of the discharge is very quick. with the quick gust of air plus the tri-fin design, the bov emits a sharp whistle noise.

the SARD r2d2 has a medium sized outlet which induces the common 'pssht' sound. there are no gimmicks to manipulate the discharged air, so the noise in general is the common psht. the blitz and greddy bovs both emit similar sounds.

 

Are you talking about a BOV on a turbo or a Supercharger ?

 

a BOV should be universal as it would work perfectly identical on a supercharger or a turbocharger system with an inlet duct to the throttle body.

 

I was inquiring about the sound for a TT. Helpful input though fellas. Thanks.

 

I was inquiring about the sound for a TT. Helpful input though fellas. Thanks.

 

I was inquiring about the sound for a TT. Helpful input though fellas. Thanks.

 

I was inquiring about the sound for a TT. Helpful input though fellas. Thanks.

 

I was inquiring about the sound for a TT. Helpful input though fellas. Thanks.

 

Andy
The BOV on a Vortech SC is a Bypass valve . It is open under vacuum and closes when vacuum drops to a adjusted level and opens again when your off the gas and vacuum comes back

 

what about the BOV´s that make a kind of fluttering noise?

 

When they are set to loosely, they will release air in a flutter-meaning more than 1 clean psshhh. Mine did that, I just tightened it up a few rotations and sounds much cleaner to me...

 

Yea fluttering is not good. Can lead to compressor surge killing the life of the turbo.

 

my HKS SSQV makes the high-pitched "pssssst" sound...and it's really loud compared to the stock APS bypass valve.

 

I thought the APS bov make fluttering noise and that's normal. Watched many APS ST, TT videos and they all flutter. Is this normal or what on APS?