Man, I know I've read this before, but I just did a 1/2 hour worth of searching and only came up with one concrete reference.

When is the stock BOV approaching its limit before it is no longer reliable (i.e. may start leaking)?

I thought I remembered reading several opinions that it was at 12-13 psi. Is this accurate?

Steve

 

https://www.rx7club.com/showthread.p...hreadid=165630

 

Mae! Shut it! Now!

Steve

 

Dammit Mike, no one takes a thread seriously when you post in them.

*bump!*

Steve

 

ha! i kilt it!

 

correct me if im wrong.. which i probably am.. but this guy says that a BOV isnt needed.. I always though that the BOV is what basicly regulates how much pressure your running.. Like it you have it tuned to 10 PSI anytime theres more than 10 PSI the bov lets off pressure..

I have never had a turbo car so never had any first hand exp with them yet..

 

I think you're referring to "pop off valve". This was an older, crude method used to control boost. The modern choice for boost control is dictated by the wastegate.

 

so what exactly does a BOV do? i think im

 

Wow mike, I read that thread and now I am jsut confuzed as hell. ???

 

the bov is to control the pressure between the compressor and the tb. When you decellerate the car the turbo is still spinning, hence creating boost, but your tb plates are closed, so as the pressure increases, the bov lets air escape. If it didn't let the pressure escape, i'd imagen that the pressure would bust the tb plates in, and f your car up. someone corroborate this info.
Thanks

 

it's more there to protect the turbo from reversing. Very very hard on it.

 

dude, get an aftermarket BOV, you will love it

 

sweet discription.. ok so now where does the waist gate come into play.. IS it on the exhaust? so letting exhaust by pass the compressor so the intake side slows down.. ok I get it

one last question, Where does that screaming sound come from.. I always figured it was the blow off valve..

but in thatthread the guys where talking about the waist gate noise..

 

The Wastegate diverts exaust away from the turbo turbine so you don't accidentally create more boost than you want. None of this has to do with my original post. I can't believe nobody has an answer?

Steve

 

a dude on the swedish forum said ~1 bar .. not sure on how many psi.

/bo

 

1bar = 14. something psi

 

Now I see the importance of the throttle close dash pot.

 

just for refrence i am running the stock bov with a one way check valve on it becouse it is vented open. i have run upwards of 15-20psi and not noticed a leak. granted the 20 was a creep put still. 15 is about normal for cold weather. but its not a matter of leaking its a matter of how fast can your bov get rid of all that air. you need a high flow quick reacting bov. just my .02


ej

 

The stock BOV, ISN'T a BOV, it is a pressure actuated bypass valve venting the compressed air back into the intake prior to the compressor. If you do as slow87turbo and add a one way check valve it will react similarly to a bov, However If you are running more than stock boost I would personally suggest that you upgrade to better than stock "real" BOV.

 

they cost about $100 if nothing else its insurance you wont fuge something.


ej

 

so the stocker isnt real? the only difference between the stocker and most after market ones is that it recirculates, you can even buy aftermarket recirculating ones, so it doesnt stall when the bov blows off

 

Is it important to have a recirculating bov? does it really stall?
Thanks

 

1 bar = 14.7 psi

 

dont mention dashpot too loudly or youll get sniped by someone who can eat small people.

kevin.