can they be adjusted? I have been thinking mine is to tight.
if so, how?
thanks in advance.

 

no they make a 7 psi and 11psi spring for them

 

that doesn't make alot of sence. why would they make 2 springs only 4lbs apart when people using this thing could be boosted anywhere between 5 to 25 lbs?

 

well the 7psi spring is made for lower boost car and 11psi is made for higher boost cars

 

TiAL offers a 7lb, 8lb, 11lb and 12lb spring for their blowoff valve. This is what TiAL recommends when choosing a blowoff valve spring.

Measure engine vacuum at idle. ( engine at operating temperature )

Vacuum Reading
Between ----------------------------------------- Use Spring
-22 in/hg and -23 in/hg -------------------------12 psi (-24 in/hg)
-18 in/hg and -21 in/hg -------------------------11 psi (-22 in/hg)
-14 in/hg and -17 in/hg -------------------------9 psi (-18 in/hg)
-10 in/hg and -13 in/hg -------------------------7 psi (-14 in/hg

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 0x64 &raquo;</TD></TR><TR><TD CLASS="quote"> TiAL offers a 7lb, 8lb, 11lb and 12lb spring for their blowoff valve. This is what TiAL recommends when choosing a blowoff valve spring.
Measure engine vacuum at idle. ( engine at operating temperature )

Vacuum Reading
Between ----------------------------------------- Use Spring
-22 in/hg and -23 in/hg -------------------------12 psi (-24 in/hg)
-18 in/hg and -21 in/hg -------------------------11 psi (-22 in/hg)
-14 in/hg and -17 in/hg -------------------------9 psi (-18 in/hg)
-10 in/hg and -13 in/hg -------------------------7 psi (-14 in/hg
</TD></TR></TABLE>

 

A proper sized vacuum port and line needs to be used with the Tial. It really makes all the difference. FWIW the standard 9 psi spring is all that is needed on most cars. It will still blow off crisp even at 3.5 psi.

 

how do you tell what spring you have..I hope they are color coded.

I am curois to know what one I have now.

 

I think 9 is the default. The 7psi is usually pulled open during idle and cruise which i don't like. The 9 will be closed.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 0x64 &raquo;</TD></TR><TR><TD CLASS="quote">TiAL offers a 7lb, 8lb, 11lb and 12lb spring for their blowoff valve. This is what TiAL recommends when choosing a blowoff valve spring.

Measure engine vacuum at idle. ( engine at operating temperature )

Vacuum Reading
Between ----------------------------------------- Use Spring
-22 in/hg and -23 in/hg -------------------------12 psi (-24 in/hg)
-18 in/hg and -21 in/hg -------------------------11 psi (-22 in/hg)
-14 in/hg and -17 in/hg -------------------------9 psi (-18 in/hg)
-10 in/hg and -13 in/hg -------------------------7 psi (-14 in/hg </TD></TR></TABLE>

Thank you thank you thank you!!!! I was gonna post this but you beat me to it, too many people are MISINFORMED like my dumb friend Bret Vaporboy12 above. Tial's BOV springs are based off how much vacuum you pull NOT how much boost you are going to run! Bret you sucka!!!

 

ook, so this thing isnt supposed to flutter...? mine does.

 

up

 

how many psi are you running?
It will make a rattlesnake/chatter sound at 0 inches of vacuum

 

no boost guage, dataloggin in Rom editor shows 8psi, hit boost cut at 9psi and still rattled... could i just be leaking boost?

 

well, while spring choiced is determined buy vacuum at idle, it still wont open unless the spring rate is met or exceeded, ie you boost 9psi or more

 

mine chatters real quick then lets out the whoosh. If it's just chattering, there may be a tiny piece of dirt inside of it. Take it apart and hit the inside with some emory cloth and put it back together and see if that helps it.