bboyferal

iTrader: (9)

Hey guys, this question concerns a problem with my BOV bleeding some boost.

Background: My BOV is a Greddy Type S. It has run fine, but recently began bleeding boost from 16 psi down to about 7. On a local dyno, it was slowly adjusted to where it stopped bleeding completely. Days later, I'm driving down the highway for some blasts and row through the gears. When I hit 16 psi, it would start bleeding off, AGAIN, down to about 12 psi this time. Okay, so the street made a difference... I adjusted it more little by little until it stopped. It's fine now, and holds 16 psi steady in any gear after repeated blasts. I tested it many times. Perfect...

Now, my question: At it's final adjustment where it's working great, the threaded screw is VERY VERY "in." With the locking washer and nut over it you cannot even see the screw sticking out anymore... It's holding up just fine right now, so I don't think it could be breaking. However, are some BOV's known to operate at full tension? Is this normal? Or should I start looking for a new one?

Frost

iTrader: (45)

I would just worry about the cracking force needed at blowoff to keep stress off of the compressor. How does it sound when it blows off?

bboyferal

iTrader: (9)

It's definitely making the right sound, so the compressor is not in trouble... If it was any more loose, the BOV would just let the boost out... So it's not going back to haunt the turbo since I only tightened it to the point it held peak boost and then stopped tightening it.

I was just worried a bit about whether the BOV can work reliably at its strongest possible setting... It's tightened to where the screw is not even visible or felt over the nut.

bboyferal

iTrader: (9)

Bump... Will my BOV be okay like this? Or is this a sign of its inadequacy?

2000Hawk

iTrader: (5)

Sucks that your car is giving you problems again, i don't know BOVs but i think if it gives you problems again to get another one.
-Joel

JAvenger007

iTrader: (9)

Is 16psi within its manufacturers rating? If they claim it can support 16+ then you should be ok. Unless of course the unit has weakened.

bboyferal

iTrader: (9)

Well, actually, right now the good thing is it's not giving me a problem, but I am worried about the future. I am enjoying the car now in this beautiful weather though.




Do they "weaken"? I thought they just worked or didn't work. This explains though. When I bought it, the manufacturer rating was 400 hp... I brought up the low rating, and the seller told me that it's because they based it off of typical import car peak numbers, boost pressures past 20 psi; He mentioned I'd be okay because I was planning to run only 15 psi. I wonder now...

ddnspider

iTrader: (26)

so long as its not leaking or causing compressor surge i wouldnt worry about it.

bboyferal

iTrader: (9)

^ Good to hear dude.

BTW, good kill with the exotic.

ddnspider

iTrader: (26)

thanks bro,had to show em what the el es juan has

Rxmfn7

Greddy Type-S is only rated up to about 14psi. For above that you should be using the Type R. I believe even the RS is rated a bit higher than the standard S.

bboyferal

iTrader: (9)

Ha, that would explain why it's so taxed right now... When even at the strongest tension it won't hold boost, I will upgrade. Thanks for the suggestions! How did you find out its psi rating? I checked everywhere on their site.

Rxmfn7

Hmm.. now that you mention it I cant find a source either. I just know from experience with alot of DSMs and Rx7s that much past 14psi they start to bleed a bit.