Tial BOV sticking causing stalling, remedy?

[turbol]

My girlfriends talon has a Tial 50mm BOV on it, its atmospheric which is a problem in the first place since she isn't using a blow through MAF or any ems. But upon looking at it I noticed its movements were very choppy. The plunger seems to get stuck then kinds slams down but only after the car stumbles a bit. My TurboXS bov on my 93 impreza makes much smoother movements thats why I think something is wrong with it. Can I just grease the BOV or is there some adjustments I can make.


Also the pressure/vac line for the BOV is the same one I am using for the MBC. I think the vent hole in the MBC (venom/JoeP/DIY whatever you want to call it) is causing the BOV to act weird. Is this a possibility? I am going to use a dedicated line for each and see if that clears things up. thanks in advance.

 

[TURFNNSURF]

My girlfriends talon has a Tial 50mm BOV on it, its atmospheric which is a problem in the first place since she isn't using a blow through MAF or any ems. But upon looking at it I noticed its movements were very choppy. The plunger seems to get stuck then kinds slams down but only after the car stumbles a bit. My TurboXS bov on my 93 impreza makes much smoother movements thats why I think something is wrong with it. Can I just grease the BOV or is there some adjustments I can make.


Also the pressure/vac line for the BOV is the same one I am using for the MBC. I think the vent hole in the MBC (venom/JoeP/DIY whatever you want to call it) is causing the BOV to act weird. Is this a possibility? I am going to use a dedicated line for each and see if that clears things up. thanks in advance.

The BOV should have it's own Vac source!!!! Using the same line T'ed from the MBC is a BAD idea and will cause more problems.

What you should do is look for a used 1G BOV and UICP flanged for it on EBAY. Im sure you have read on here that venting on a car without a Blow-through setup is a bad idea!!! Take out the Tial for the time being so the car runs right until you can afford to get a GM MAFT setup..

 

[turborebel]

I've got a tial and a 3" MAF blow through, works great. Indepent lines are the way to go.
The tial has a viton Oring seal. If it still needs a lube job call Tial and make sure to use the right grease. I,m guessing it will be silicon or teflon grease. There are also different springs for the Tial, what psi is the boost set at?


brent

 

[tkelly27]

The orifice won't be causing problems as it's not exposed when the engine goes into vacuum. Actually under vacuum the MBC turns into a dead end. I have one line from the manifold, to the wastegate, and something else (I cut them all off when I found out the head needed to come off) and it ran fine. However, to rule it out as a possibility, run it it's own line.

Try popping it off and moving it by hand and moving your other one by hand. If it's catching, figure out why and lube it up or get a replacement if the cylinder walls are scored up.

Why are you not recirculating with a draw through MAF?

 

[turbol]

haha lets get this straight. I, on my car, run a blow through atmospheric setup.

She on her talon made some poor mod choices in the past (didnt know her then, would have advised her otherwise) and is running atmospheric on a draw through.

Ok well Ill take the advice every suggessted and use separate lines to rule anything out, Ill also see if i can get some lube and help it out a bit. Shes going blow through in a little while with a GM MAF and a translator....just waiting on the translator.thanks for the help.

 

[Slippi84]

Does the car suffer from stalling issues. I was runing gm setup and evo mad but my car didn't like the gm setup so I went with my current evo maf but the problem is when I got my gm setup I bought a tial style bov. So i'm currentlly breaking dsm law number 1 but I have no choice untill I can get my hands on another bov setup and intake as my pipe has no attachments for recirculation.

Anyway My car seems to fall on it's face and then catch it's self too and I think my mbc is t'd off my bov vacume too. That is actualy where I was told to go from and I think I got that off vfaqs a long time ago.

 

[oldman]

The orifice won't be causing problems as it's not exposed when the engine goes into vacuum. Actually under vacuum the MBC turns into a dead end.

That's only true on a ball and spring MBC, without knowing which MBC she have (TurboXS for example), you can say that for sure.

I'm a little confused with your post as to how yours is setup, if your MBC (ball/spring or bleeder) is sharing the same line with the BOV, your BOV will be open under boost.

 

[Slippi84]

I have a regular homemade style mbc the bleeder style and I read to T it off the bov line straight from v faq they had a picture and everything.

 

[oldman]

I have a regular homemade style mbc the bleeder style and I read to T it off the bov line straight from v faq they had a picture and everything.

That was the old way of doing things, many side effects have since been discovered, worst being an opened BOV under WOT due to pressure being bleed off through the wastegate pressure relief hole on your MBC. Furthermore, since you have a bleeder type valve, your BOV reaction time is also affected as well as creating a vacuum leak, introducing unmetered/unfiltered air into the system since the BOV line is connected to your intake manifold. A bleeder type MBC, like the TurboXS MBC, on the BOV line is the worst possible combination.

 

[Slippi84]

That was the old way of doing things, many side effects have since been discovered, worst being an opened BOV under WOT due to pressure being bleed off through the wastegate pressure relief hole on your MBC. Furthermore, since you have a bleeder type valve, your BOV reaction time is also affected as well as creating a vacuum leak, introducing unmetered/unfiltered air into the system since the BOV line is connected to your intake manifold. A bleeder type MBC, like the TurboXS MBC, on the BOV line is the worst possible combination.

No problem just tell me the right place to go off of and i'll change it. I have to change my bov and intake setup anyway.

 

[oldman]

No problem just tell me the right place to go off of and i'll change it. I have to change my bov and intake setup anyway.

The compressor cover on your GT14, tap or weld a fitting if it doesn't have one. I just read your other thread about stalling, this probably compounded the problem, improper venting aside.

 

[Slippi84]

Your probably right. So let me get this right I run the bottom hook up to the wastegate and the side hook up to the compressor housing?

 

[oldman]

Your probably right. So let me get this right I run the bottom hook up to the wastegate and the side hook up to the compressor housing?

Let's not use the terms "side" and "bottom" since I have no idea what your home made MBC looks like or how it's designed, "inlet of MBC to compressor housing, outlet to the wastegate.

 

[Slippi84]

Let's not use the terms "side" and "bottom" since I have no idea what your home made MBC looks like or how it's designed, "inlet of MBC to compressor housing, outlet to the wastegate.

It's not really home made but there all the same bleeder style. The bottom is the side directly across from the adjustment nob and the side is perpindicular to the nob. So are we still talking about the same thing inlet and outlet wise?

 

[oldman]

It's not really home made but there all the same bleeder style. The bottom is the side directly across from the adjustment nob and the side is perpindicular to the nob. So are we still talking about the same thing inlet and outlet wise?

Are you absolutely sure there is not a ball and a spring inside? This is a very difficult question to answer without knowing its exact design, reason being only a ball and spring is limited to physical shape, a bleeder type can pretty much be anything. For example, a TurboXS bleeder MBC is exactly as you described where as some bleeder types has 3 fitting, two sides and one bottom where the two side fittings are inlet and outlet and the bottom fitting is the bleeder fitting to be re-routed back to the intake pipe instead of VTA. Is this a home made or not? If not, it should have an arrow on it.

 

[Slippi84]

I picked it up off ebay so tech its' not homeade but for this case yes it's homemade as it's not a name brand or anything. Anyway I know what the inside of it looks like and it's NOT a ball and spring inside.

 

[oldman]

I picked it up off ebay so tech its' not homeade but for this case yes it's homemade as it's not a name brand or anything. Anyway I know what the inside of it looks like and it's NOT a ball and spring inside.

Do you have a link to a similar unit on ebay?

 

[Slippi84]

Nevermind I forgot which mbc I had on my car I had to go look at it after you asked I do have a universla ball nd spring style on there right now.