[tc535i]

Originally Posted by J. Dub

So this is pointless for those of us on turbosmart or HKS BOV's?

It's pointless for anyone that doesn't experience surging, Tial or otherwise.

[J. Dub]

Originally Posted by tc535i

It's pointless for anyone that doesn't experience surging, Tial or otherwise.

By surging you mean when you're on the throttle and the car goes then, after .8 seconds the car surges forward as it climbs a certain rpm section?

[Evil///M]

Originally Posted by J. Dub

By surging you mean when you're on the throttle and the car goes then, after .8 seconds the car surges forward as it climbs a certain rpm section?

I experience this. Also have an issue with overboost that I believe to be BOV/ vac line related..

[b1mmr]

I decided to go the same route as the other guy and reserve the oem nipple for when I have a gauge. It'd be nice to have it back there for stealthness but I'm not really concerned about it. I think it gives a bit of favorable look by being seen. Was in a pinch and had to use an impact drill and hose clamp to get the massive 8mm id hose to seal on the bov nipple. Will go back over it all on my days off. [IMG]

View post on imgur.com

[/IMG]
Misread the little bag that the nipple came in and later realized it was actually a 5/16" barb and installed it anyways.. It's big lol

[Maniac0908]

Subd

[J. Dub]

Game what about you and I with the Turbosmart, should we do this? Or is this only a TIAL thing?

[b1mmr]

Originally Posted by J. Dub

Game what about you and I with the Turbosmart, should we do this? Or is this only a TIAL thing?

Tial recommends the 1/4" specifically on their bov. If you don't surge with the correct spring for your set up, you won't need to do this. That doesn't mean you can't benefit from it however.

Bigger line means the bov will see a higher (stronger) vacuum sooner and for a longer period of time resulting in more dumped air. Which is good. When the vacuum cannot over come the spring completely you get surge,and this usually happens (for example) when you boost to 3 psi and then let off to 1 psi without closing the throttle. Worse case scenario it will flutter at higher psi which is even worse for the turbo. Can also happen when closing the throttle to, of course.

I did this mod and have some mild fluttering still.. That means I can move on to the next step which is finding the correct spring. This means removing more coil(s) or half coil(s) from my spring until my coil suits my idle vacuum. More ideally you would read your vacuum at idle with a gauge and then order the appropriate spring.

[Game]

Originally Posted by J. Dub

Game what about you and I with the Turbosmart, should we do this? Or is this only a TIAL thing?

Hmm...I am getting surges in third gear when on partial throttle near the 4k-5krpm range. Didn't know this mod could solve that.

[Maniac0908]

Where did you guys get hoses from? I bought some a while back when i upgraded the other vacuum lines but forgot from where.

[J. Dub]

Originally Posted by Game

Hmm...I am getting surges in third gear when on partial throttle near the 4k-5krpm range. Didn't know this mod could solve that.

I'm sending you my cell phone #. I'd like to discuss further since you're the only other person on turbosmart like me.

[b1mmr]

Originally Posted by Maniac0908

Where did you guys get hoses from? I bought some a while back when i upgraded the other vacuum lines but forgot from where.

Autozone for sure has them.. You have to ask

[eguti335i]

Originally Posted by Jeff@TopGearSolutions

It seems to be only Tial and not all Tial users need to do this. Only ones who are experiencing issues.

I for one, run the stock location with a 4MM line without a hitch.

Jeff, didnt your 4mm line fit a little loose on the plastic nipple? I have some 4mm line laying around, but put on 3mm i stead as it dit more snug. I want to put the 4mm to get some better response.

Also what spring are u using? Currently running 10 psi, a hairline crack open when at idle. You think 11 psi should respond better?

[b1mmr]

Originally Posted by Game

Hmm...I am getting surges in third gear when on partial throttle near the 4k-5krpm range. Didn't know this mod could solve that.

It could help equalize pressure better.. The way a tial or tial-type bov works is when your throttle is open, the pressure on both ends of the bov piston is the same.. When the throttle closes, vacuum forms in the manifold and pressure forms in the charge pipe. The vacuum pulls the piston and the boost pushes the piston. I'm not definitively saying it it will help, but what does help is trouble shooting.

One thing I found odd today was when boosting up a long slightly sloped hill and when reducing throttle, it wanted to let air out for a sec. Also my bov makes like a 2 part sound, I'm not sure if I'm hearing a build up of air then a release or if that's just how it's releasing. Curve ball is when I go into ds mode (auto) the bov will let go very crisp and immediate. I'm not sure if the throttle closes faster in ds and creates vacuum faster, or what..

[b1mmr]

Originally Posted by eguti335i

Jeff, didnt your 4mm line fit a little loose on the plastic nipple? I have some 4mm line laying around, but put on 3mm i stead as it dit more snug. I want to put the 4mm to get some better response.

Also what spring are u using? Currently running 10 psi, a hairline crack open when at idle. You think 11 psi should respond better?

If you bov is closed it's going to have less lag because you don't need to wait for the pressure to equalize and close the piston. They say you want the piston to seat itself, like almost cracked but instead sealed. 11 psi is recommend for this platform by tial and all the vendors & 10 psi spring is a known mask for this issue. Use a hose clamp or something like a zip tie if you wanna run 4mm but if it isn't snug to begin with you'll need a lot of clamping force for a seal. I have a 5/16 7.9mm hose on my bov nipple and if I don't use a hose clamp with an impact drill it leaks lol. Just do the mod next weekend.

[b1mmr]

Originally Posted by J. Dub

I'm sending you my cell phone #. I'd like to discuss further since you're the only other person on turbosmart like me.

Lmk what you guys come up with

[J. Dub]

Originally Posted by Ian_N54

Lmk what you guys come up with

Ian, are you on turbosmart also?

[b1mmr]

Originally Posted by J. Dub

Ian, are you on turbosmart also?

Unbranded tial, but I believe their bov is very similar. Spring and vertical piston with no adjustment right?

[J. Dub]

Originally Posted by Ian_N54

Unbranded tial, but I believe their bov is very similar. Spring and vertical piston with no adjustment right?

I've never seen a tial in person. Maybe Game knows?

[Jeff@TopGearSolutions]

Originally Posted by eguti335i

Jeff, didnt your 4mm line fit a little loose on the plastic nipple? I have some 4mm line laying around, but put on 3mm i stead as it dit more snug. I want to put the 4mm to get some better response.

Also what spring are u using? Currently running 10 psi, a hairline crack open when at idle. You think 11 psi should respond better?

It didn't fit loose but the previous owner modified the nipple in some fashion. I do have a zip tie on it for good measure but no issues. I might end up pulling it out and putting a nice brass barbed fitting on it. I never had problems with my BOV though.

The tial came with the 4MM line and I just stuck it on.

I'm on the standard 11 PSI spring. Keep in mind my car is Auto.

Now, my previous E92 was MT did have some slight fluttering at low psi, under 5 PSI usually. I really didn't get too involved in trying to diagnose why at the time. (We are talking a good 5 years ago).

If you are surging at high boost and WOT, that is a concern. I think people may be chasing there tails with the low boost under 5 PSI stuff.

But for starters, get the 4MM line on and switch the fitting to accommodate it. After that, it's all about the spring in Tial.

Someone made a good post before:

Tial recommends the 1/4" specifically on their bov. If you don't surge with the correct spring for your set up, you won't need to do this. That doesn't mean you can't benefit from it however.

Bigger line means the bov will see a higher (stronger) vacuum sooner and for a longer period of time resulting in more dumped air. Which is good. When the vacuum cannot over come the spring completely you get surge,and this usually happens (for example) when you boost to 3 psi and then let off to 1 psi without closing the throttle. Worse case scenario it will flutter at higher psi which is even worse for the turbo. Can also happen when closing the throttle to, of course.

I did this mod and have some mild fluttering still.. That means I can move on to the next step which is finding the correct spring. This means removing more coil(s) or half coil(s) from my spring until my coil suits my idle vacuum. More ideally you would read your vacuum at idle with a gauge and then order the appropriate spring.

[eguti335i]

replaced to a 4mm, the slight flutter is now gone. its now even a little more open during idle, which i dont mind as there is no extra lag or anything.

I used a small zip tie as well, no way that thing is coming off.

thanks for the input jeff.

[J. Dub]

Can we drive on a broken nipple? I broke the nipple to my intake mani tonight, need to get to work in the am

[ferocity02]

Seal it with some RTV or tape and don't go into boost.