BOV going bad?
BOV going bad? 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?
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?
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.
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.
Originally Posted by JAvenger007
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.
Last edited by bboyferal; Nov 18, 2007 at 10:12 AM.
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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.
Staging Lane
Joined: May 2006
Posts: 56
Likes: 0
From: PA
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.
