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ive got to admit, a good mate of mine has twin arc bov on a 26/30 build and on gate, slamming through gears sounds baws.

given that im not a fan of a loud atmo bov can cause stall and idle issues, most sensible people will opt for a factory GTR unit.

I thought all turbo engines need a BOV when you're running 20 odd psi.

Otherwise : Surge = Turbo damage ?

Ceramic wheeled turbos - Yes

A lot of Steel wheel turbo cars never ran a BOV from factory (VL Turbos are a pretty good example of this)

Currently running a blanking plate (for defect clearance purpose)

It is the gayest sounding shit I've ever heard. Disregarding the potential damage it can cause to the turbo (I'm not boosting it at all while it's there, bar a couple of times to hear it), it sounds absolutely terrible.

I don't see the appeal for dose. f**king top bloke dream boats in VL turbos

Sorta off topic, I know.

Turbosmart make a duel port bov that bolts up to the factory bov flange and has a plunb back adapter that comes with it i have 1 on my car (and its plumbed back FYI) works good :thumbsup:

Right now I have an Apexi slide adjustable BOV to atmo with an RB25/30 with a GT3076R.

It sounded better before with the old high flow on medium orifice.

There was a relatively loud clean flutter that would growl deep and spook dogs.

Now with the 3076 it is set on large orifice and doesn't flutter as nice and is also really F%$#@%^loud on high boost.

When it releases the pssshhht, it's like someone is smashing a bottle right next to your head.

Now with the cops increasingly picking on us I wanna plumb back.

I don't think I can plumb back this BOV.

I've heard a few S15's getting around with a really cool high pitch flutter.

Not too loud, like a whistle lowering in pitch as it flutters.

Can anyone tell me which BOV's do this and can be plumbed.

I only track it once a year so ragged edge performance isn't a total requirement.

cheers.

It is an emission issue, air escaping thats been metered = more fuel which means rich which means carbon. Well in NSW anyway its an actual fine not just defect. Not sure about vic

That can be tuned around. It's more to do with the fact that for a completely legal ventilation system, your engine breathers should be venting into your intake - this = oil fume escaping from your BOV when it opens. If you say well, just run breathers on your catch can.....this is equally illegal

Anyone that puts a BOV on for sound is just a plain f**king dickhead.

This man....he knows :thumbsup:

Bovs are totally gay. And so are people that fit them.

If you want a bov, use the stock recirculation valve that is still plumbed back.

You may be right, 100% of the rally championship entry line should be called immediately. Quick while you still can....tell them all they are gay!

And recirculation valve is just another name for a BOV and vice versa - yes they do different things/operate slightly differently but the principal is exactly the same and they are there for a reason.

While you're calling the WRC, make sure you let Nissan, Toyota and the countless other manufacturers know of their homosexuality

Ceramic wheeled turbos - Yes

A lot of Steel wheel turbo cars never ran a BOV from factory (VL Turbos are a pretty good example of this)

They are better on ceramic turbine, yes. But they do protect the turbo from large amounts of reversion which stresses a turbo no matter what its made of. Heat damages ceramic turbos more than not having a BOV installed.

I think we can all agree on one thing though....

PSSSSSSHHHHTTTT!!!! TUTUTUTUTUTUTUTUTUTUTUTUTUTUTTTTUUUUUUUUUUUUUUUUUUU

Oh and I forgot, if you just want to muffle the sound, try heading down to clark rubber and picking up some filter foam. Cable tie some of that shit around the BOV outlet and the sound will be cut in half at least. You can also argue that the air is filtered but I spent half an hour arguing with a coppa on that one and he ended up fining me anyway so at your own risk

Yeah should have been mo specific lol. i still run a BOV because i feel a bit safer having it on there

Greddy type RS copy. cheap but does the job. custom recirc adapter, no problems so far

Thats a pretty cool setup.

Its been changed since then when I put my HKS turbo + intake on, but maintains a very simliar setup, just 2 x 90 degree hoses and one straight bit of pipe instead lol.

Might get flamed for this but I didnt want to use a stock BOV cause I absoloutly hate the way they sound. Ran one up till the day I started using the Front facing Plenum setup, and it is 100% true when people say there is nothing wrong with them. Would not hesitate to suggest using one to anyone, there just not for me

Care to post a video of what that sounds like with the Type RS copy recirculated?

I have a genuine Type RS on mine that i got cheap when they bought out the RZ. I got it because im the same, the stock one sounds shit lol. And because i dont recirculate mine, as running MAP ECU i dont need to.

People choose exhausts based on what they sound like too, not JUST the benefit. So whats the difference.

You may be right, 100% of the rally championship entry line should be called immediately. Quick while you still can....tell them all they are gay!

And recirculation valve is just another name for a BOV and vice versa - yes they do different things/operate slightly differently but the principal is exactly the same and they are there for a reason.

While you're calling the WRC, make sure you let Nissan, Toyota and the countless other manufacturers know of their homosexuality

Excuse me?????

I dont think you see where i'm coming from.

The point i was getting at, is people that fit atmospheric venting blow off valves to be "sick" and 'hektik', but have no idea on what effects it causes the metered air that has been read by the ECU and suddenly vented to air. Not to mention the added cop attention.

They quite often cause idle issues, plug fouling, hesitation when changing gears etc etc.

Factory recirculation valves are there for a reason, and i believe in them. I dont use one myself for my own reasons (no not to intentionally cause flutterzzz).

The comment i was making is pretty much the same as The_Mafia's.

So i dont think i have to call the WRC at all. Hope this clears things up.

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