Tial BOV issue

[Secondchance]

It will. You get way more vacuum.

It's definitely working better. Am I the only one who feels like our intakes get quieter ?

 

[Metalmania82]

Yes, from BOV to the rear manifold port as pictured in this thread. Everything else stock. I did cap the line coming from the solenoid that goes to the diverter/BOV.

Did you cap off the line that you pulled off of the manifold or just let it go?

 

[SKStinger]

Did you cap off the line that you pulled off of the manifold or just let it go?

Just left it. It doesn’t leak. Seems like it has a check valve in it.

 

[SKStinger]

It's definitely working better. Am I the only one who feels like our intakes get quieter ?

It’s probably because your BOV is louder and drowning out your intakes now.

 

[Whiteybird]

anybody have pics of how they are running a bypass, and capping the original routes?

 

[SKStinger]

anybody have pics of how they are running a bypass, and capping the original routes?

What I did is what Chris’ photos show in this thread (post #14). The only difference is that I added a cap to the line out of the solenoid that the BOV normally would connect to.

 

[Whiteybird]

What I did is what Chris’ photos show in this thread (post #14). The only difference is that I added a cap to the line out of the solenoid that the BOV normally would connect to.

Ah i see it now. I assume reading here it will give more vacuum, was trying to track down the same problem for a friend that has the Tial BOV. My Agency Power ones never had this issue, but I'm never opposed to them being louder LOL.

What vacuum line is disconnected from the back of the manifold? Does it serve no real purpose?

 

[SKStinger]

Ah i see it now. I assume reading here it will give more vacuum, was trying to track down the same problem for a friend that has the Tial BOV. My Agency Power ones never had this issue, but I'm never opposed to them being louder LOL.

What vacuum line is disconnected from the back of the manifold? Does it serve no real purpose?

This will make them louder and I think any BOV will perform better with the vacuum instead of the computer controlled solenoid as it was designed for the stock diverter valves.

I don’t know what the purpose of that short line is.

 

[djerickd]

Does that grey line feed boost thru a one way check valve that puts boost into a separate chamber for the BOV solenoid to get its reference??

 

[SKStinger]

Does that grey line feed boost thru a one way check valve that puts boost into a separate chamber for the BOV solenoid to get its reference??

Maybe partially. But even without it connected you can feel the air escaping the solenoid.

 

[Metalmania82]

I capped that rear line after I saw your posts. Gonna try it without capping the line and see what happens.

Anyone else getting two separate and distinctly different BOV type sounds when letting off throttle? Within a half second of each other, one coming from what sounds like center (probably the BOV) and the other from (specifically to me maybe) the passenger side?

 

[Secondchance]

Does that grey line feed boost thru a one way check valve that puts boost into a separate chamber for the BOV solenoid to get its reference??

I blocked off the grey line as well, just in case. It didn't seem active at idle, but under load it could suck air into the system for all we know, even with the filter/valve. Better safe than sorry.

 

[djerickd]

Same here

 

[Htcdroid03]

I capped that rear line after I saw your posts. Gonna try it without capping the line and see what happens.

Anyone else getting two separate and distinctly different BOV type sounds when letting off throttle? Within a half second of each other, one coming from what sounds like center (probably the BOV) and the other from (specifically to me maybe) the passenger side?

Did you ever figure out what it was? I'm hearing the exact same thing right now.

 

[Metalmania82]

Did you ever figure out what it was? I'm hearing the exact same thing right now.

Negative. Haven't really looked into it much other than switching the vac lines around but still hear the same noise. There's no drive ability issue. I'm hoping we get a couple dry days during this "pandemic" and I can tinker around with outside.

Let me know if you figure anything out or something new comes up.

 

[Htcdroid03]

I've got new bigger ID vacuum hose coming in the mail to try. Anybody actually tried throwing in a 4 psi spring? I cant post the link but amazon sells them.

 

[Metalmania82]

Let me know how that goes, please.

I don't think anyone has and haven't heard back from the other member several posts back where he said he was in contact with TiAL for weaker spring. I'm assuming the springs aren't brand specific?

 

[G-847886]

Let me know how that goes, please.

I don't think anyone has and haven't heard back from the other member several posts back where he said he was in contact with TiAL for weaker spring. I'm assuming the springs aren't brand specific?

Absolutely, hose should be in Saturday so I'll play with the vacuum configurations and see how that does. Don't believe brand should matter, just wastegate size. went ahead and ordered the 4 psi for a 50mm since I'm just curious now. Send it ️

 

[Metalmania82]

Where did you find that spring?

 

[Htcdroid03]

Where did you find that spring?

The spring was way big dont worry bout it. what I have found so far is running the 7mm id hose made no difference but its what tial recommends so keeping with it. I put in a red spring I had leftover from a tial mvs wastegate, its the same size as the stock black spring but slightly softer. It holds bov shut at idle from the solenoid but not from the manifold. Bov Sounds like it should about 95%. The black spring seems to have just enough force to keep it closed from manifold vacuum, I shaved the smallest amount off and it no longer held closed. What I'm wondering is the torque app shows -18 vacuum at idle which would suggest that we need the white or plain springs according to there chart, so what I was thinking is the dual sound I'm hearing when letting off throttle is the boost pressure pushing up with enough force to leak by and make the "weird" noise in that split second before full vacuum hits releasing the rest and making the "normal" sound. I'm going to try shimming the black spring next and prove my theory right or wrong