[HyperM3]

Just finished installing my TIAL BOV and first time around, ended up blowing the pipe off the throttle body. Second time(after put it all back together) I lost 1lb of boost(down to 12.9) and I hear NOTHING when letting off. No sound whatsoever.

I put it all together correctly, that Im sure. If my pipe popped off from the pressure the first time, that makes me think that the BOV isnt working properly. The fact that it didnt pop off the second time means I just tightened it better. However, still not hearing the BOV means the air isnt getting routed, its getting pushed back into the throttle body.

Any ideas?

[SoCal335i]

Defective BOV i think. Did you hook up the vac line to the Bov itself?

[HyperM3]

Originally Posted by SoCal335i

Defective BOV i think. Did you hook up the vac line to the Bov itself?

Yeah, thats what Im supposed to do. At least Im getting readings on my boost gauge showing me that that connection works.

[SoCal335i]

Originally Posted by HyperM3

Yeah, thats what Im supposed to do. At least Im getting readings on my boost gauge showing me that that connection works.

Then the bov is shut and is not letting any air pass thru to relieve pressure which is why its blowing it off the throttle body. I say bad BOV. Where did you get it from?

[HyperM3]

Originally Posted by SoCal335i

Then the bov is shut and is not letting any air pass thru to relieve pressure which is why its blowing it off the throttle body. I say bad BOV. Where did you get it from?

Ultimate racing. Already PM'd Darryl, havent heard back yet. Is there a way I can test it? On other BOV's I had pushed in the diaphram to test it. Didnt think about doing it on this one.

[IMJUSS2NASTY]

Hyper, rev it to 7k and let off, let the rpm drop 5k and rev it to 7 again. I hear it all the time when I do that.

[IMJUSS2NASTY]

How many psi should the procede be pushing?

[HyperM3]

Originally Posted by IMJUSS2NASTY

How many psi should the procede be pushing?

Ive been seeing 13.7-13.9lbs.

Ok, I took the whole BOV apart. The spring is extremely strong. I dont recommend anyone doing this who hasnt done it before. You could be unexpecting when the top flies off into your face.

It seems that theres a lot of stiction in the diaphram. I was debating on greasing it up a little to help it out a bit. I put my piston grips on it with something against the diaphram and tightened it up. It moved smoothly and I left it clenched for a bit so the spring got used to it.

Reinstalled it and went for a drive.

The minute I fired it up I heard this super high pitched whistle but it was very faint. I guess the diaphram was settling.

Hit it decently hard and saw 13.2lbs so I was happy again. However, there was a delay in BOV sound. I would hit boost, let off, then about half a second later I would hear a little pshhh. Did it a couple times more and there was still a delay. Im used to BOV's that you hear before youve practically released the pedal fully.

When I pulled into my driveway I gave it a few more quick revs and heard the faint psshhh's a little quicker. Ill have to give it some more hard driving than just around the block.

Anyway, I took a bajillion pics for a DIY on this if anyone cares. The instructions were barely readable and didnt want anyone who felt uncomfortable doing this without good help. :rocks:

DIY will be up in a few days.

[IMJUSS2NASTY]

Hyper, yea at first the Bov sounds faint, after I drove ti a few times it got stronger and stronger. Everything alright with boost? I hope its not leaking boost. Tell me if you notice any hinders in performance. Thanks

[danielg]

Originally Posted by SoCal335i

I say bad BOV. Where did you get it from?

Agreed. Can you adjust the tension on the spring? If so loosen it up, and see if that allows air to pass through. If not, the entire piece might be bad...

How did you blow off the IC pipe off the throttle body?

[HyperM3]

Originally Posted by danielg

Agreed. Can you adjust the tension on the spring? If so loosen it up, and see if that allows air to pass through. If not, the entire piece might be bad...

How did you blow off the IC pipe off the throttle body?

Its not an adjustable tensed BOV. Its just screwed together. FWIW, its a really nice BOV. The manufacturing on it is extremely tight. Very impressive. I think it just needed to get worked in a bit though.

The IC pipe blew off because I didnt have the clamps tightened correctly. My bad. I assumed that the two on the pipe(either side) had come pretightened already. Never assume.

[Bravo1]

Hope you don't have problems with boost surge when its all said and done. What was the spring set to handle?

[HyperM3]

Originally Posted by Bravo1

Hope you don't have problems with boost surge when its all said and done. What was the spring set to handle?

The spring is rated above and beyond what Ill be hitting but not too high. That was the first question I asked.

[IMJUSS2NASTY]

Hyper let me noe if anything is wrong with the Bov, I dont wanan sacrafice performance nor reliability.

[HyperM3]

Originally Posted by IMJUSS2NASTY

Hyper let me noe if anything is wrong with the Bov, I dont wanan sacrafice performance nor reliability.

Dont worry, Im a stickler for that crap. If it detracts even 1hp I remove things. Ill keep everyone posted.

[IMJUSS2NASTY]

Thanks bro.

[HyperM3]

Just went out for an extended drive. Car felt pretty solid reaching boost in the mid 13's which Im happy with. Still got the delay on the air release though. Im gonna take it apart again and grease it up a bit. Hopefully that will help.

[danielg]

glad to hear it's working correctly... sounds like your "needs to broken in theory" I about right...although it could be caused by a super stiff spring that's not leting much get through.... if you went far above and beyond a certain psi rating...

be careful with those ic pipes and clamps...in a past life my turbo dsm would blow off an ic pipe like crazy..I ended up having to use spring loaded t bolt clamps which were pretty expensive for clamps. going WOT and having a pipe blow off feels like you blew the motor..lol

[HyperM3]

Originally Posted by danielg

be careful with those ic pipes and clamps...in a past life my turbo dsm would blow off an ic pipe like crazy..I ended up having to use spring loaded t bolt clamps which were pretty expensive for clamps. going WOT and having a pipe blow off feels like you blew the motor..lol

Yeah, I know that deal. I use those mega-spring clamps on the intake pipe of my supercharged m3. The silicon seals were blowing off lilke mad.

[HyperM3]

Originally Posted by HyperM3

Just went out for an extended drive. Car felt pretty solid reaching boost in the mid 13's which Im happy with. Still got the delay on the air release though. Im gonna take it apart again and grease it up a bit. Hopefully that will help.

Ok, another drive and Im not happy anymore. Im losing .7-1 lbs of boost and theres a serious delay with the release of air from the BOV. Im feeling this is more detrimental than beneficial at this point. I PM'd Ultimate Racing to get a resolution to this mess. Hopefully Ill have an answer for you all shortly.

[BoostedBMW]

Hyper... it must be the spring that is no good since there should be almost no delay once you let your foot off the gas to when you can hear the tial release the air. I had a tial on my s2k, which was only running 7-8psi so with the correct spring you should be fine. I knew a few people with turbo s2k's that got defective wastegates from tial so maybe you just got a bad one. I would ask the UR guys for another one and see how that works out.

[HyperM3]

Originally Posted by BoostedBMW

Hyper... it must be the spring that is no good since there should be almost no delay once you let your foot off the gas to when you can hear the tial release the air. I had a tial on my s2k, which was only running 7-8psi so with the correct spring you should be fine. I knew a few people with turbo s2k's that got defective wastegates from tial so maybe you just got a bad one. I would ask the UR guys for another one and see how that works out.

Yeah, so it goes I guess. Might not be just the spring but the whole unit itself. Like I said, I PM'd Darryl at UR to see what can be done about this. In the meantime, I just dont want to hurt the car with any unecessary pressure surge if its not releasing in time. Thinking of putting it back to stock for now.