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Old 02-21-2013, 10:04 AM   #1
dleclerc27
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Default Boost/Blow-Off issue

So here is an interesting question that there may be an easy answer for - to set the stage, I am in the 04WRX, with a TurboXS BOV and the stock turbo, with the Lamoco boost gauge, 3" CBE, AEM CAI.

Even prior to putting the CAI and CBE in, my BOV hasn't releasing properly on anything over (almost exactly) .2bar/.02MPa. I'll actually get the venting that sounds proper, meaning that I get the hiss and that there isn't a gross fluttering, from about -.1bar to .2bar. Anything OVER that, in any gear, I just get what sounds like fluttering/chattering from the BOV.

I was thinking that the gauge itself might be f'ed, but it sits at 0 when the cars off, so I don't think calibration is the issue. I thought that the spring in the BOV might be toast, but before I open it up and try to swap out, I figured I would ask the powers that be. I don't need a-hole replies, but I always appreciate the knowledgeable ones. Thanks guys.
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Old 02-21-2013, 10:10 AM   #2
Snowphun
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What else can you do but take it off and clean it or replace it? It's held on by two 12mm bolts, couldn't be easier to take off and examine.

You've checked all the hoses?
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Old 02-21-2013, 10:14 AM   #3
dleclerc27
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That makes sense to me and is the next step. In regards to the hoses - I replaced them all when I put the BOV in, so hopefully that's not the case. Thanks!
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Old 02-21-2013, 10:31 AM   #4
vision.dynamix
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Throw that piece of **** in the garbage where it belongs.
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Old 02-21-2013, 10:39 AM   #5
dleclerc27
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Throw that piece of **** in the garbage where it belongs.

Definitely helpful, thanks.
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Old 02-21-2013, 10:41 AM   #6
vision.dynamix
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Double.

Last edited by vision.dynamix; 02-21-2013 at 10:52 AM.
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Old 02-21-2013, 10:41 AM   #7
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Sorry, just telling you how it is. What's that saying about polishing a turd?

Bottom line, that's a ****ty valve.
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Old 02-21-2013, 10:54 AM   #8
dleclerc27
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We shall see, thanks for the input - it's brand new, so it's definitely surprising, I didn't know if someone had an alternate mechanical piece of advice. If it sucks, it sucks, but it being new/reputable company/set up right, I'm surprised.
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Old 02-21-2013, 10:56 AM   #9
vision.dynamix
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A new piece of **** is still a piece of ****.

Do some research you'll find that valve is a POS. the HKS valve is a POS from a good company also.

There's not many good BOVs out there.
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Old 02-21-2013, 10:57 AM   #10
dleclerc27
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Your thoughts on a good one?
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Old 02-21-2013, 11:00 AM   #11
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TurboSmart
TiAL (setup is super essential on this one, but once set up it is great)
The old school Blitz ones
Synapse

Pretty much it. GFB is garbage also.
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Old 02-21-2013, 11:20 AM   #12
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FWIW, I'm pleased with my Forge. Unsure if there is a model # for your car though.
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Old 02-21-2013, 11:22 AM   #13
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Forge is also a good valve. Forgot about them.

FWIW, the reputation Blow off Valves have in the Subaru world is because people are using ****ty valves, NOT because blow off valves in general are bad for the cars.
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Old 02-21-2013, 11:23 AM   #14
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Forge is also a good valve. Forgot about them.

FWIW, the reputation Blow off Valves have in the Subaru world is because people are using ****ty valves, NOT because blow off valves in general are bad for the cars.
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Old 02-21-2013, 11:28 AM   #15
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My friend had this same bov. While I'm no expert on bov's, I think these can be adjusted with very little money (literally). Do a search, but I remember you could use quarters to space the spring a bit. Although, it sounds as if the spring may be too aggressive and it wants to stay closed? Does it come lubed from the factory?

I ran a crushed stock sti bpv for years with zero headaches. Always found bov's to be a headache of problems and sounds.
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Old 02-21-2013, 11:32 AM   #16
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Quote:
Originally Posted by RSblood View Post
My friend had this same bov. While I'm no expert on bov's, I think these can be adjusted with very little money (literally). Do a search, but I remember you could use quarters to space the spring a bit. Although, it sounds as if the spring may be too aggressive and it wants to stay closed? Does it come lubed from the factory?

I ran a crushed stock sti bpv for years with zero headaches. Always found bov's to be a headache of problems and sounds.
Thanks, yeah - I am going to do that this weekend, washers work as well, I'll report back on that one.
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Old 02-21-2013, 11:33 AM   #17
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Quote:
Originally Posted by vision.dynamix View Post
TurboSmart
TiAL (setup is super essential on this one, but once set up it is great)
The old school Blitz ones
Synapse

Pretty much it. GFB is garbage also.
Appreciate the info - I'm going to tinker with it a bit this weekend, if that doesn't work, I'll be looking elsewhere for one. Thanks.
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Old 02-21-2013, 11:49 AM   #18
BradX978
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Why do you have a BOV on your stock turbo? The recirc, especially in your year (being older they're still made of metal ?) are perfectly fine up to 19-20psi. Am I wrong?

Don't get me wrong, I love the tsst as much as the next guy but it just seems pre mature for the car on the mod steps.

As vision said, turbosmart. Their 50/50 valve is getting great reviews all the way across the board and may be the best option for you at this stage in power.

*not a Subaru or BOV expert by any means, just read reviews and personal experiences.
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Old 02-21-2013, 11:50 AM   #19
vision.dynamix
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Shameless plug: I have both a TurboSmart Dual Port (50/50) and a TiAL for sale.
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Old 02-21-2013, 11:52 AM   #20
BlazeRex
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I worry more about the valves leaking at idle and decel than anything..
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Old 02-21-2013, 12:24 PM   #21
dleclerc27
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Quote:
Originally Posted by BradX978 View Post
Why do you have a BOV on your stock turbo? The recirc, especially in your year (being older they're still made of metal ?) are perfectly fine up to 19-20psi. Am I wrong?

Don't get me wrong, I love the tsst as much as the next guy but it just seems pre mature for the car on the mod steps.

As vision said, turbosmart. Their 50/50 valve is getting great reviews all the way across the board and may be the best option for you at this stage in power.

*not a Subaru or BOV expert by any means, just read reviews and personal experiences.
Totally agreed. I'm getting the STi turbo in anyways, with hopes of going larger in the future when that and the supporting mods become monetarily do-able. I know it's premature, but coming from a Saab when it was all but impossible, you yearn for dumb things.
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Old 02-21-2013, 12:40 PM   #22
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I understand man, was just confused. Have you tried letting a tuner tinker with it to see if that helps?
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