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Hi,

Just wondering if anyone knows a type of bov that makes the fluttering sound. Hate to describe sounds but its not the PSHH sound but more a continuous sound.

Something like Fuu...Fuu....Fuuu.... or a bit more high pitch noise and also continuous.

There are a few skylines in Syd west that sounds like that. If u own one pls tell me the type of bov ur using.

Thanks in advance

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I think that's more to do with the size of the turbo than the BOV, I think it's a sign that the air is not flowing smoothly and will wear out the turbo faster than usual. Either way, I've heard a few different types of bovs do it. Mine does it, but when I heard a sample of it played on a website, it didn't have the fluttering sound. I've got a GReddy Type R bov, and a T04 turbo. It doesn't do it everytime either, if I'm revving the engine hard and do a quick change it doesn't seem to get time to make the fluttering sound.

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You might want to do a search on the site for more info, but basically the noise you're hearing is the sound of the turbo "chopping" the air as it bounces back off the throttle body. Usually not a good thing. If your BOV is tuned properly, it should vent the pressure rather than let it flow back through the turbo

Cheers,

Tim

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