BOV Flutter Sound

[Mk3 SuPrA]

Is it normal for a BOV to make this sound? Or does it mean its gone bad?

 

[lunatic]

my old BOV made it all the time it wasn't under full boost when it fired and i drove it doing that for almost 50,000 miles so i don't think its bad for it but i haven't done a whole lot of research into it so i don't know for sure

 

[thevork]

What flutter sound is it exactly?
A lot of people using an HKS SSQV bov have the 'flutter' problem, which is actually turbo surge due to the bov opening to slow.

What BOV are you running?

 

[radiod]

A lot of people using an HKS SSQV bov have the 'flutter' problem, which is actually turbo surge due to the bov opening to slow.

This. Most of the time what you've described is compressor surge which over time can lead to shaft play and a very unhappy turbo.

 

[57trimMKIII]

My BOV (Bosch upgrade) makes the "flutter sound" if you're "inbetween" boost and vacuum.

It's always done that, and judging by lunatic's similar reply I'd say it's nothing to worry about.

 

[KTM530]

^that noise associated with the Bosch BOV in my case is it sealing closed.

 

[Mk3 SuPrA]

yea i've heard about the compressor surge but many mkiv supras have a BOV that sound like that. So does that mean they're all getting that compressor surge?

 

[57trimMKIII]

^that noise associated with the Bosch BOV in my case is it sealing closed.

Is the noise you're referring to more of a "howl" than a flutter?

 

[KTM530]

^ precisley.

 

[thevork]

yea i've heard about the compressor surge but many mkiv supras have a BOV that sound like that. So does that mean they're all getting that compressor surge?

Yes a lot of supras have surge.