Turbo Flutter

[Decypher]

Hey guys,

 

I currently have a bov which is just the straight atmospherical release creating the rush sound.

 

Does anyone know of any way to create the turbo flutter sound?

[axle117]

Sounds like you're after compressor surge.

Remove BOV block up hole and enjoy ssstututututututu.

Or get a BOV with a tighter spring.

[Decypher]

Where abouts do i block off? Like the line off of the bypass valve?

[Kiwi_Fozze]

Metal plate (coke can works) between the tmic and the recirc valve (assuming bolt on recirc valve)

[Batbaruman]

that what you want? i have some myself not sure why (just started after changing from top mount to front mount, have an atmospheric BOV) during lower RPMs, thought it sounded pretty cool but after a while i just stopped hearing it altogether, just something that gets filtered out along with the many other noises car makes haha. wouldn't recommend you go out of your way to do it , but below is how it's intentionally caused... disclaimer : not sure on negative effects of this

 

 

how to in a subaru

 

[swamp]

I think getting an HKS SSQV bov would be a good idea, never tried the abovementioned methods.

 

I like it too but then again it would remind me of a Nissan everytime it goes off 

[BeastGRB]

5 hours ago, swamp said:

I think getting an HKS SSQV bov would be a good idea, never tried the abovementioned methods.

 

I like it too but then again it would remind me of a Nissan everytime it goes off 

 

Since this post got resurrected :D. I have an HKS SSQV BOV in my car atm and mine does make that STUTUTUTU noise at partial throttle below 3800RPM. Not a Nissan type which goes on for longer but sounds similarly the same but at a shorter rate and full boost is the usual PSHHHHH

Not sure why you'd want a compressor surge either; it's not good for your turbo so I've heard. 

[swamp]

I've deleted my BOV, left it on there from the intake side but it is disconnected from the compressor-ic side. Come to think of it, I think I'm  venting to atmosphere which sounds nice but won't pass WOF. will try clamping small vacuum hose to bov and turning it 180deg to see if that flutters

[swamp]

Cometely deleted bov, blocked up all hoses and no sutututu. The internet says it's more likely to work on FMIC due to more piping and air in system, but I will try having a cold air intake complete with aluminum piping and maybe increasing the diameter of the other sides piping. All aluminum of course which supposedly reverberates better. 

[Timmah]

36 minutes ago, swamp said:

Cometely deleted bov, blocked up all hoses and no sutututu. The internet says it's more likely to work on FMIC due to more piping and air in system, but I will try having a cold air intake complete with aluminum piping and maybe increasing the diameter of the other sides piping. All aluminum of course which supposedly reverberates better. 

Factory airbox? That probably is silencing that compressor surge.. On my old WRX I had a cold airbox with a mushy, got me some sweet sweet stututut.

 

 

[swamp]

25 minutes ago, Timmah said:

Factory airbox? That probably is silencing that compressor surge.. On my old WRX I had a cold airbox with a mushy, got me some sweet sweet stututut.

 

 

More details please sounds like what I'm after. I have an old pod filter connecting to maf then alloy intake and I think rubber hose connector. Was your cold air box aluminium? Did you use factory bov? 

[Timmah]

12 hours ago, swamp said:

More details please sounds like what I'm after. I have an old pod filter connecting to maf then alloy intake and I think rubber hose connector. Was your cold air box aluminium? Did you use factory bov? 

 You're in luck! I still have a photo of my old engine bay:

 

 

Was a GFB Responc BoV that I had 100% recirc

[swamp]

Nice!! I won't show you mine lol but I've got compressor surge Now. I had to take off an elbow which was letting out any boost above a certain pressure and replace it with a 90deg rad hose. Tightened it all up and et voila. Jumped off motorway to be safe but ride home if felt very good and boost built. Think I got it to about 5000rpm with no hassles. Everything has to be super tight or else the air will escape through any way it can find. 

[iludez]

Any reason why you want compressor surge?

[boon]

You trade off making your car slower and kinda raping your turbo in exchange for a bit of "sututututu" noise.

 

Each to their own, but IMO there's a pretty good reason Mr Subaru put a BOV on the car in the first place.

[Joker]

When I was fiddling with the setting on my GTB & GFB BOV managed to get a bit of this

 

Funny old fad eh, like calling Adjustable Suspension "Coilovers" or Juddy's, one is right & the others arent even in the same feild

 

(Oem Subaru Suspension IS Coilover arrangement in most cases)

[swamp]

Just for a bit of sound. I am aware of the negatives of having air go back and spin the turbo, but I will eventually have a bov that sounds similar like a hks ssqv for peace of mind. Then again it is a cheap old gf8 with a td04 which can easily be replaced.