Tial BOV question

[Justin]

my tial bov will hover about halfway open at idle. That just means I need a stiffer spring correct? I have the 9psi spring. Now, the idle is at 2500 becuase I have not got around to getting everything dialed in correctly. This is the first time the car has ran since mid summer and the first time with the from.

 

[MK3Brent]

You can try shimming the spring before you decide to buy a heavier one.

I've never noticed mine open at idle. (silver spring, no idea what rate)

As long as the pressure on the valve though the vac. port is strong it should still hold in boost while in + pressure at the manifold.

I assume you're speed density.

 

[Justin]

You can try shimming the spring before you decide to buy a heavier one.

I've never noticed mine open at idle. (silver spring, no idea what rate)

As long as the pressure on the valve though the vac. port is strong it should still hold in boost while in + pressure at the manifold.

I assume you're speed density.

That is a safe assumption. I am running MAFT Pro in speed density.


It has a dedicated line off the intake manifold, and the line is hardly 14 inches, if that, so it has a great source.

 

[MK3Brent]

Yeah, I'd bet the spring isn't strong enough.

Try shimming it, that's what I did with mine when I go drag racing and don't want the valve opening much if at all.

 

[americanjebus]

I may be wrong but i believe that our vacuum pressure requires that you run an 11psi spring on the Tial for it to work properly on our cars.

 

[OneJoeZee]

http://www.tialmedia.com/documents/w3_tial_bov50_sp.pdf

 

[Justin]

Thanks guys... looks like i'll be buyin an 11psi spring here soon

I'd rather just get the right spring than shim it.

 

[IJ.]

Damn I'd be really concerned if it's open at all under any condition other than venting!! :aigo: (it'll be sucking shit/dust/debris in the whole time)