Tial Noise?
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From: Pensacola Fl
Tial Noise?
I recently installed a tial 50mm BOV on my car. It came with the 10lb spring, which made the BOV stay closed at idle. I just installed the 3lb spring this afternoon and it
makes a weird noise. I obviously know that I am going to hear all the air coming out at idle. However, it makes a weird noise at idle too, kind of like a hiccup, or like it is
turbulent air. It only makes this noise every couple of seconds. Sounds like something is loose in the SC, which makes it have a different hiccup sound. It is hard to describe,
which makes it even harder for you guys to give your opinion. I will see if I can get this video to work.
In the video you can sort of hear it if you listen closely. It is like a stumble/flutter/turbulent sound. Like it is missing some where. I can always put the 10lb spring
back in, but it will not be open at idle. You have to listen very closely to hear it.
http://www.youtube.com/watch?v=fxiDoxGsYPA
makes a weird noise. I obviously know that I am going to hear all the air coming out at idle. However, it makes a weird noise at idle too, kind of like a hiccup, or like it is
turbulent air. It only makes this noise every couple of seconds. Sounds like something is loose in the SC, which makes it have a different hiccup sound. It is hard to describe,
which makes it even harder for you guys to give your opinion. I will see if I can get this video to work.
In the video you can sort of hear it if you listen closely. It is like a stumble/flutter/turbulent sound. Like it is missing some where. I can always put the 10lb spring
back in, but it will not be open at idle. You have to listen very closely to hear it.
http://www.youtube.com/watch?v=fxiDoxGsYPA
Last edited by PhilsZ51; Dec 15, 2010 at 08:00 PM. Reason: SP errors
Team Owner
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From: cookeville tennessee
ttt
How many miles on this head unit. Did it just start after the 3lb spring. Put the 10 back in her and she if it still does it. If you dont get any better help may call ECS or A/A.....
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From: Pensacola Fl
The head unit should have around 5k miles on it and it didn't make that noise with the 10lb spring. You can only hear it when the BOV stays open(3lb spring). With the 10lb spring, it remains closed at idle and only opens when the vacuum hits 20, which isn't too often. Usually only opens when I let off the gas. I could put the 10lb spring back in there, but I hear it is bad to have the BOV closed at idle.
Le Mans Master
Joined: Aug 2002
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From: Houston TX
St. Jude Donor '11
You want the BOV open until just before passing over into atmospheric which the 3# spring does.
I don't hear the hiccup on the blackberry and can't get to youtube at work.
I don't hear the hiccup on the blackberry and can't get to youtube at work.
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From: Pensacola Fl
It is really difficult to hear it on the video. I am going to try to get better video, or just deal with it and hope it goes away. I am hoping it has something to do with the tune, supposed to get it tuned on Saturday. We will see.
Drifting
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From: somewhere shooting my assault rifles
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Uh why on earth do u want the bov open at idle!?? And what your hearing is bov flutter and it's cuz of the vac and pressure isn't working correctly. I've never heard of keeping a
bov open at idle they should be closed. The function of the bov is to release the pressure
build up and usually would dump back Into the intake for metered airflow (maf) but depending on your setup atmospheric bov work just fine. Usually a DV or diverter valve is more responsive because of the dumping air into the Intake affects spool time usually. What psi are u running?
bov open at idle they should be closed. The function of the bov is to release the pressure
build up and usually would dump back Into the intake for metered airflow (maf) but depending on your setup atmospheric bov work just fine. Usually a DV or diverter valve is more responsive because of the dumping air into the Intake affects spool time usually. What psi are u running?
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Le Mans Master
Joined: Aug 2002
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From: Houston TX
St. Jude Donor '11
This is not a turbo application. Because its a centri blower it is trying to make boost all the time, even at idle. So if you don't have the BOV open, you're just heating up the air.
Drifting
Joined: Sep 2008
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From: somewhere shooting my assault rifles
Even with the 10# spring the Tial should be open at idle and cruising out of boost bleeding off air for most apps unless you gotta helluva cam in it. What is your vacuum at idle and cruising?
Where is your vacuum/boost line source from for the Tial? Is the line a good thick walled one or is it a cheap thin walled line that might be collapsing under vacuum and causing valve to flutter open/closed?
Get a mighty vac and test the valve for leaking and each spring to see exactly when its moving at what vacuum and making sure it is sealing. Just because it has a certain # spring in it doesn't mean that when its actually moving. You need to find out exactly what your idle vacuum is and check Tial with mighty vac for when its moving and then go from there.
I had a Vortech BOV that was a POS and constantly blowing the o-ring out of the valve facing or partially out and causing it not to seal properly.
Where is your vacuum/boost line source from for the Tial? Is the line a good thick walled one or is it a cheap thin walled line that might be collapsing under vacuum and causing valve to flutter open/closed?
Get a mighty vac and test the valve for leaking and each spring to see exactly when its moving at what vacuum and making sure it is sealing. Just because it has a certain # spring in it doesn't mean that when its actually moving. You need to find out exactly what your idle vacuum is and check Tial with mighty vac for when its moving and then go from there.
I had a Vortech BOV that was a POS and constantly blowing the o-ring out of the valve facing or partially out and causing it not to seal properly.
Last edited by Z06supercharged; Dec 17, 2010 at 11:23 PM.
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From: Pensacola Fl
The vacuum is 18 at idle. The problem isn't the spring opening and closing. When the BOV is open at idle, something is making a noise other than the bov. I think it is something to do with the SC. I think the seals may be bad in it(see oil dripping down the outlet, through the intercooler piping). And I think something inside the SC is causing it to buck, or cause the turbulent air. I am going to see how it holds up on the dyno tomorrow.
When I had the 10lb spring in the BOV, it wouldn't open until the vacuum hit 20. With the 3lb spring, the BOV will open around 6.
When I had the 10lb spring in the BOV, it wouldn't open until the vacuum hit 20. With the 3lb spring, the BOV will open around 6.
Drifting
Joined: Sep 2008
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From: somewhere shooting my assault rifles
Do you happen to have a vent hose from your oil cap going to your air filter base? If you do then its probably sucking enough oily crap through it to pass through your outlet and all the way through your system and coating your intercooler as well which completely wrecks its ability to take heat out of the airflow.
My 3# spring closes at 3#'s. The 10# i started with closed right around 10#'s as well.
My 3# spring closes at 3#'s. The 10# i started with closed right around 10#'s as well.
Last edited by Z06supercharged; Dec 18, 2010 at 03:48 AM.
Instructor
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^^^ ya didnt see he had a SC setup wasnt in the post...and honestly the video is pretty poor quality as i cant really tell whats making what noise..you should move the camera around to different parts of the engine bay as well as rev it up a little to make the noise a little more pronounce. and im not an expert on super chargers BUT have you thought about going to a MAP based tune instead of MAF?? i would think you would want to have the BOV closed at idle...granted the SC is always producing psi but at idle? that just doesnt make sense it should be in vacuum right? maybe -15 to -10? idk depends on your setup but still. Ive driven plenty of stock super charged cars and never noticed any of them above 0 psi (meaning boost) at idle...forgive my lack of knowledge on super chargers. but is it cuz its a certain design and not a roots /centrifugal? oh and anyone ever pressure tested or measured any differences between having semi brake line braided hose vs nylon tubing for water meth injection? No? oh ok
Last edited by Zo6TT; Dec 18, 2010 at 02:18 AM.
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From: Pensacola Fl
The car is setup for a MAP tune, ditched the MAF tune when I completed the install. Yes, there is a hose running to the air filter, not from the oil cap, but from another port from the engine; I will have to look to see where that is coming from. Good idea, I never thought of that. Have a dyno appointment at 9am this morning, I will let you everyone know how it goes. I am hoping it goes much better than last weekend.
