...it wont keep its mouth shut. At idle that is. Is this normal for a Tial 50mm to sit wide open when the car is at idle (i.e. in vacuum). Do I need a stiffer spring? I've never used a Tial BOV before, so this is a new one to me.

 

im sure that is perfectly fine. correct me if i am wrong but the bov stays open under vacumm and closes under boost.

 

I would imagine your BOV is open if the pressure in your charge pipe > the pressure in the manifold + spring.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by whoneedzvtec &raquo;</TD></TR><TR><TD CLASS="quote">im sure that is perfectly fine. correct me if i am wrong but the bov stays open under vacumm and closes under boost.</TD></TR></TABLE>

then itd never boost?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by LSTEG96 &raquo;</TD></TR><TR><TD CLASS="quote">

then itd never boost? </TD></TR></TABLE>

Once the vaccum is gone, the valve closes.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by xtremeazian &raquo;</TD></TR><TR><TD CLASS="quote">Once the vaccum is gone, the valve closes. </TD></TR></TABLE>

vaccum would never be gone?

oh yeah it would... it would go to 0. hopefully.

 

my bov came with instructions that said to adjust it until it was barely closed at idle (it has a removable top and you add washers)

 

depends on the spring you have on your BOV. i think they made 3 different spring rates. I know i read about someone with the same issue last year some time and someone went into detail. If the BOV still vents during boost, then i wouldn't worry aobut it.

 

That was a nice joke......

"Your girl is like my blow off valve - it won't keep its mouth shut.........'" ha..........thats funny.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Steve91 &raquo;</TD></TR><TR><TD CLASS="quote">...it wont keep its mouth shut. At idle that is. Is this normal for a Tial 50mm to sit wide open when the car is at idle (i.e. in vacuum). Do I need a stiffer spring? I've never used a Tial BOV before, so this is a new one to me.</TD></TR></TABLE>

you need a stiffer spring.

 

my tial stays open at idle but as soon as i took the gas it closes

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Jordo@KAP &raquo;</TD></TR><TR><TD CLASS="quote">

you need a stiffer spring. </TD></TR></TABLE>

That's what I thought. My BOV is FULLY open at idle, not just a little bit.

 

get the 9psi or 11psi spring and youll be fine..

what vaccum are you around at idle? -25hg?

 

About 18-19 inches of vacuum at idle.

 

you need 11psi spring