Jump to content
SAU Community

Recommended Posts

  • Replies 43
  • Created
  • Last Reply

Top Posters In This Topic

Short answer: BAD...

Don't do it!!

BOV is there for a reason. To allow the pressurised air to NOT hit back onto the turbo compressor wheel. Over time it may cause damage to the fins.

Why on earth would you want the "flutter sound" anyway?? I hope it鈥檚 not to sound "cool" :banana:

Link to comment
https://www.sau.com.au/forums/topic/282464-flutterdumpdose/#findComment-4756251
Share on other sites

Lol, this topic again?

50% of the world will say its bad, the other 50% will say it isnt. Personally i think it sounds awesome, but at the same time i fully agree with Adam, i dont see how it cant be bad for the turbo. Its compressor surge, spinning the turbine backwards, it can not be good. If you didnt need a BOV, why would anyone have them?

Link to comment
https://www.sau.com.au/forums/topic/282464-flutterdumpdose/#findComment-4756421
Share on other sites

The sound of flutter/dose is awesome. Love it.

It will kill a ceramic turbo like stock R32, R33, R34, S13-S15 turbo's. Won't kill steel turbo's like single VG30 turbo's or RB30ET turbo's.

Flutter at 10psi is ok, but if you are running 14+ psi through a RB20/25 turbo it will kill the turbo

Link to comment
https://www.sau.com.au/forums/topic/282464-flutterdumpdose/#findComment-4757562
Share on other sites

The sound of flutter/dose is awesome. Love it.

It will kill a ceramic turbo like stock R32, R33, R34, S13-S15 turbo's. Won't kill steel turbo's like single VG30 turbo's or RB30ET turbo's.

Flutter at 10psi is ok, but if you are running 14+ psi through a RB20/25 turbo it will kill the turbo

+5MILLION

Dosing/flutter is THE BEST SOUND !!!

Link to comment
https://www.sau.com.au/forums/topic/282464-flutterdumpdose/#findComment-4758372
Share on other sites

THANK YOU!

farken hell...

I blocked off my BOV ages ago as it was leaking and I kept it like that as it sounds better then an atmo bov and is still legal...

Boost (on standard turbo (presumadely)) is now at 1 bar and it's been like that for a while... turbo still isn't dead.

Either way, overheating and general miscare of the turbo will destroy, fluttering can be a part of this but not a main part...

Link to comment
https://www.sau.com.au/forums/topic/282464-flutterdumpdose/#findComment-4758925
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now



  • Similar Content

  • Latest Posts

    • Thanks everyone for the replies and suggestions. Got the seats out (hoping I could find some existing grommets but no such luck). By tapping and measuring etc. I could figure out where I could drill through if needed. But first I borrowed an inspection camera and managed to go through factory holes in the chassis rail and could see that the captive nut was holding steady which is why it could retighten. So it was indeed a stripped section of thread, so I applied downforce by levering the bolt head with a screwdriver and went slowly back and forth until it came out. Camera helped a lot cos I could monitor that the captive nut was holding tight. Now I just have one very seized main subframe nut to tackle 馃槄
    • BOVs do have a purpose, if you ever log pressure before and after the throttle body, you will see a spike pre throttle on lift off from a WOT condition. Enough to bend throttle blades / damage e-throttle motors or simple assist in blowing off cooler pipes. FWIW, the above on really applies to those running at least 2 bar of boost. OP shouldn't have an issue, on the other hand, here are some videos of my shit box over a decade ago with some succulent dose with the airbox on and off. That shit box is unrecognisable these days 馃珷    
    • I've tried all different combinations of BOVs/ no BOV and stock bypass valves over the years, on gear changes the stock bypass valve seems to get the car back on boost quicker because in part the turbos wheel speed isn't being slowed down by reversion, although they have issues holding boost much over the stock setting. Most aftermarket BOVs you can adjust the spring, tighter will make it open later and close sooner, but in my experience it'll cause a bit of flutter at low load/rpm anyway. I've also got some input into this whole no bov causing turbo wear, never had an issue on any on my turbos HOWEVER, I got my R33 GTST with 200k kms on it, with from what I can see still has the original turbo, no lateral shaft play but has about 4-5mm of play in and out which to me seems like a worn thrust bearing from years (100-150k kms?) of turbo flutter running no bov, so maybe there is some truth to it in the long run. But that'll never stop me loving the Stutututu while I have the car.   OP just wants to know if he can run a atmo vented BOV with no major issues and the answer is YES, plenty of people do it, there's no harm in installing it and seeing how it runs before spending $$$ on an aftermarket ecu, last time I bought a Nistune it was $2400 for install and a tune , unsure of todays prices but you get me. Crazy money to spend just to fix the minor inconvenience of stalling that can be overcome by letting the revs come down to near idle before putting the clutch in or a little bit of throttle to avoid it. You're better off leaving the ecu and tune for after a bigger turbo/injectors have been installed to take full advantage of the tune and get your moneys worth.   Let OP have his Whoosh sound without trying to break his bank haha
    • I see you missed the rest of the conversation where they have benefits, but nothing to do with avoiding breaking turbos, which is what the aftermarket BOV made all the fan boys, tuners, and modders believe was the only purpose for them...
    • But they do so for the other reasons to have a compressor bypass. It's in the name.
  • Create New...