Blitz BOV problem
Thread Starter
can I haz?
Joined: Aug 2002
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From: P Town, NY
Blitz BOV problem
I am running a B20 vtec setup with a drag III kit on it boosting 11Psi. Having a problem getting my BOV to release the pressure after boost, it sounds like a damn Hyena laughing at me and I know its compressor surge. Am I going crazy or is this just how the damn Blitz BOV sounds like, also not sure if it is because my Vac lines are to long or connected to too many sources.
below are pics of the lines connected to my Bov and a T to the WG on the same line, could this be the problem or do I just have a POS BOV. If I do have a POS BOV what should I replace it with.
below are pics of the lines connected to my Bov and a T to the WG on the same line, could this be the problem or do I just have a POS BOV. If I do have a POS BOV what should I replace it with.
Thread Starter
can I haz?
Joined: Aug 2002
Posts: 1,777
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From: P Town, NY
Re: Blitz BOV problem
just dont see how the vacuum has anything to do with it not blowing off, the vacuum should just hold the valve in place while boosting. when the vacuum lowers it permits the valve to move and release pressure from the turbo correct?
Thread Starter
can I haz?
Joined: Aug 2002
Posts: 1,777
Likes: 0
From: P Town, NY
Re: Blitz BOV problem
I took the BOV off to see if the piston was getting stuck, it works properly so I assume it is just not getting enough vacuum. will run anothe rline straight from the IM to the BOV, hope that will work.
Honda-Tech Member
Joined: Nov 2001
Posts: 1,087
Likes: 1
From: 30 min. north of Owen Sound, Ontario, Canada
Re: Blitz BOV problem
my friend has the EXACT same setup as you, even the BOV. His makes the laughing sound as well.. and it blows off quiet after full throttle... we tried everything we can do to make it not laugh at us.lol but it's just how it works. Just make sure the BOV is not fully closed when idling.... and no your vacuum line is fine just try not to tee it if possible.
Thread Starter
can I haz?
Joined: Aug 2002
Posts: 1,777
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From: P Town, NY
Re: Blitz BOV problem
no the laughing noise is not fine, it is compressor surge for sure. I had my car tuned like this by a tuner I was told knew what he was doing, needless to say he smoked my first turbo and he will never touch my car again.
I will let you know if it goes away after doing a straight source of Vacuum from the IM>BOV with a larger hose, if not I will get a different BOV. I am pretty sure the valve isnt opening at idle and it is adjusted to lowest setting, when letting off the throttle it almost stalls out and then recovers.
I will let you know if it goes away after doing a straight source of Vacuum from the IM>BOV with a larger hose, if not I will get a different BOV. I am pretty sure the valve isnt opening at idle and it is adjusted to lowest setting, when letting off the throttle it almost stalls out and then recovers.
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Honda-Tech Member
Joined: Jan 2004
Posts: 783
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From: Phoenix,AZ United States
Re: Blitz BOV problem
I have that same BOV with the stiff 18+Psi spring and it does not do that anymore. I can tell you that having a dedicated vacuum source is the way to go. I used the port that used to go to the PCV valve on the top of the IM in the middle. it works perfect right there for some reason, but when it was surging, I had it Tee'd to the FPR line, and other places.
https://honda-tech.com/forums/showth...2494678&page=3
Rep to the following for accurate/helpful feedback:
Silva Buillt DC4
CRX Dan
Smoovy
Tony The Tiger
HiProfile
You all were right. I switched to the PCV port without a tee, and it is working perfectly. It is whooshing like a normal BOV should. You all have possibly saved me thousands of dollars in turbo and/or engine damage. Thanks!
Thanks to everyone else for their input as well. I think this is a great forum for us all to learn something new. Here are a few pics of what I changed.
I ran the BOV to the PCV port and the PCV valve to the port that was running to that round thingy that no one seems to know what the heck it is.
I removed the round thingy and took it apart. I blew into it, and it turns out there is a diaphram inside that will divert vacuum/boost to whatever the top port on it used to run to. At any rate, I just capped that round thingy off. It seems to run just fine without it being hooked up.
The only question I now have is this: Is it safe to run my PCV through the port that I connected it to? Will it spray oil into my intake manifold?
One last thing. I think this should be added to the sticky portion of this formum because it seems to be a relatively common problem. I mean, there are members on here and several other forums who think that fluttering is normal, or that it is something that one just has to live with.
Silva Buillt DC4
CRX Dan
Smoovy
Tony The Tiger
HiProfile
You all were right. I switched to the PCV port without a tee, and it is working perfectly. It is whooshing like a normal BOV should. You all have possibly saved me thousands of dollars in turbo and/or engine damage. Thanks!
Thanks to everyone else for their input as well. I think this is a great forum for us all to learn something new. Here are a few pics of what I changed.
I ran the BOV to the PCV port and the PCV valve to the port that was running to that round thingy that no one seems to know what the heck it is.
I removed the round thingy and took it apart. I blew into it, and it turns out there is a diaphram inside that will divert vacuum/boost to whatever the top port on it used to run to. At any rate, I just capped that round thingy off. It seems to run just fine without it being hooked up.
The only question I now have is this: Is it safe to run my PCV through the port that I connected it to? Will it spray oil into my intake manifold?
One last thing. I think this should be added to the sticky portion of this formum because it seems to be a relatively common problem. I mean, there are members on here and several other forums who think that fluttering is normal, or that it is something that one just has to live with.
Thread Starter
can I haz?
Joined: Aug 2002
Posts: 1,777
Likes: 0
From: P Town, NY
Re: Blitz BOV problem
He was trying to tune my built motor at 22+PSI creeping turbo, with compressor surge and messed up the turbo. I just have many bad stories between the tuner and mechanic that I will save for another thread. This motor has been rebuilt 3 times and a lot of money has gone into it, just dont want to throw more money away.
this is what I pretty much came to the conclusion off, I have the Victor X manifold and 4 sources of vacuum on it. Only 2 where hooked up and the hoses used where extremely small, maybe just big enough for the boost gauge. I am hooking up 2 more sources of vacuum, one will be dedicated to only the BOV the other will be for just the wastegate.
Tried to get all the parts today but ran out of time, got some today and hopefully the rest tomorrow. once I change it up I will let you know the results.
I have that same BOV with the stiff 18+Psi spring and it does not do that anymore. I can tell you that having a dedicated vacuum source is the way to go. I used the port that used to go to the PCV valve on the top of the IM in the middle. it works perfect right there for some reason, but when it was surging, I had it Tee'd to the FPR line, and other places.
https://honda-tech.com/forums/showth...2494678&page=3
https://honda-tech.com/forums/showth...2494678&page=3
Tried to get all the parts today but ran out of time, got some today and hopefully the rest tomorrow. once I change it up I will let you know the results.
Honda-Tech Member
Joined: Nov 2001
Posts: 1,087
Likes: 1
From: 30 min. north of Owen Sound, Ontario, Canada
Re: Blitz BOV problem
It only laughs at light throttle. It doesn't do it at full. Make sure your BOV is NOT fully closed when idling.
also, again, make sure to have a good vacuum source. do not tee it off anything THEN see what happens.
also, again, make sure to have a good vacuum source. do not tee it off anything THEN see what happens.
Last edited by hoya_10fintec; Jul 1, 2009 at 02:38 PM.
Thread Starter
can I haz?
Joined: Aug 2002
Posts: 1,777
Likes: 0
From: P Town, NY
Re: Blitz BOV problem
just finished redoing my vacuum lines, the BOV has its own line as well as the wastegate. going to take it for a spin and see if she will blow off, i have the BOV set at the least tention (screw all the way out).
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