Splitting the BPV line for a BOV...

[HammondMSP]

Talked to another member today with Turbohose Hardpipes and a Greddy Type S. He said that for the BOV, all I have to do is use a T and split the bpv line and run the other side to the BOV; "wholla!!!" no stalling. How many of you have tried this and received good results from this? Thanks...

 

[HammondMSP]

or do I need to use something like the brake booster line for the bov?

 

[sickspeed94]

"wholla!!!" voila? lol nah don't know anythign about it.

 

[jurgs01]

That's exactly what you do for the vacuum source. I have it done, works great. ********** posted pictures toward the end of the turbohoses hardpipe thread.

 

[NoVaMSP]

any vaccum source would work. but it would perform better with seperate lines.
you wont stall (often) as long as some is being plumbed back. you may throw a cel if too much is vented. the stock bpv allready shares vaccum with the waste gate. not sure if you have a MBC/gauges installed or not , but it should be in the waste gate line. some thing to think about... the less T's in the same line the better i run my BoV from the brake booster (alone) wastegate and mbc from the stock line , and my gauge from its own also. it would NOT be good to run a BPV + BOV + MBC + gauge + wastegate from same line.

 

[celdridge]

Talked to another member today with Turbohose Hardpipes and a Greddy Type S. He said that for the BOV, all I have to do is use a T and split the bpv line and run the other side to the BOV; "wholla!!!" no stalling. How many of you have tried this and received good results from this? Thanks...

That is a good vacuum source ... but that has nothing to do with stalling. You will have to configure your BOV to keep the car from stalling. It just takes like 30 mins ...

 

[celdridge]

any vaccum source would work. but it would perform better with seperate lines.
you wont stall (often) as long as some is being plumbed back. you may throw a cel if too much is vented. the stock bpv allready shares vaccum with the waste gate. not sure if you have a MBC/gauges installed or not , but it should be in the waste gate line. some thing to think about... the less T's in the same line the better i run my BoV from the brake booster (alone) wastegate and mbc from the stock line , and my gauge from its own also. it would NOT be good to run a BPV + BOV + MBC + gauge + wastegate from same line.

No it would not ... there is not enough vacuum in that line to pull everything ... just break down and chop the booster line already... its 100 times better vacuum than the other source ... and let me tell you ... once you cut that hard line from your intake to the BPV / wastegate .. you are not going to get a T connector in that stuff ... you are going to have to rerun the vacuum line anyway. That line is hard as a ****** rock.

 

[NoVaMSP]

No it would not ... there is not enough vacuum in that line to pull everything ... just break down and chop the booster line already... its 100 times better vacuum than the other source ... and let me tell you ... once you cut that hard line from your intake to the BPV / wastegate .. you are not going to get a T connector in that stuff ... you are going to have to rerun the vacuum line anyway. That line is hard as a ****** rock.

exactly , thats why i was tellin him to just T some where new now .
the stock lines suck allready, too put both valves on the same stock line . thats ghetto and would not lead to best performance.

 

[celdridge]

exactly , thats why i was tellin him to just T some where new now .
the stock lines suck allready, too put both valves on the same stock line . thats ghetto and would not lead to best performance.

Agreed 155.9%.

 

[HammondMSP]

ok... so brake booster line it is!!!

Unless I just go with the Forge BOV which is a direct replacement. Kinda thinking bout that since all my mods now are bolt on.

 

[jurgs01]

exactly , thats why i was tellin him to just T some where new now .
the stock lines suck allready, too put both valves on the same stock line . thats ghetto and would not lead to best performance.

http://www.msprotege.com/forum/attachment.php?attachmentid=19771

There's a picture of the greddy running off the same line as the BPV. There is enough vacuum to run both, and having it on the line to the wastegate more thoroughly represents what the turbo is doing. I agree that the factory hoses suck, and it would benefit greatly to get quality hoses and other than platic T-connectors.

 

[NoVaMSP]

http://www.msprotege.com/forum/attachment.php?attachmentid=19771

There's a picture of the greddy running off the same line as the BPV. There is enough vacuum to run both, and having it on the line to the wastegate more thoroughly represents what the turbo is doing. I agree that the factory hoses suck, and it would benefit greatly to get quality hoses and other than platic T-connectors.

right on theres a pic of it , still shouldnt run 2 valves from 1 vacuum source
try it both ways if you like , but im 100% sure youll get better performance from your valves and your car if you run seperate lines . as stated earlier especially if your running a MBC from the waste gate line also.

i dont use the twin valve set up , im running a custom FMIC with a turbosmart valve . the valve recirculates as well as vents and ive tried it 10 diffrent ways. for ME i found the best response from valve/wastegate/turbo running it like this ----> wastegate+MBC (stock path replaced with better line)
BOV from my brake booster ( alone- 100% better response) and my boost gauge from another source.

i doubt any one would really recomend running 2-4 Ts from the same line unless there was no other choice.

 

[jurgs01]

I'll try it both ways. I get what you are saying, but if I'm not mistaken isn't an MBC just restricting the flow of that line to your wastegate, thus "tricking your wastegate into thinking" there is less flow than there actually is and causing it to open at a higher pressure thus raising your boost. I would think putting a couple of Ts in that line would only cause minor restriction and a slight raise in boost. Correct me if I am way out in left field on this. I do understand that the BOV would actuate better and faster if it didn't have to share it's vacuum source with the BPV, but it's not "rigging it" to put them on the same line with good hoses and metal Y shaped taps. I will try it on the brake booster line, maybe you are right.

 

[BMC]

<-- From personal experience...I was running two valves off of the stock BPV line. Car ran like sheit and stalled. That could have been from not tuning the BOV, but I spliced a line, to run them separatly, and it works much better now.

 

[tiwing]

more T's = longer time for anything on the line to react. So if your wastegate is on the same line as two BOVs and a gauge, you will have more boost spike than if the wastegate is on a separate line. With the essential speed hardpipes, the wastegate is hooked into a nipple on the Turbo -> IC pipe, so the wastegate is immediate to respond to boost pressures. The downside is that boost at the manifold actually drops from stock because of pressure loss across the Intercooler - but that's no problem if you're using a boost controller.

The more direct you can get to the manifold for each thing that requires vacuum, the faster responding each thing will be. Figure out where you need the most performance (IMO wastegate is the most important, BOV/BPV second, and gauge third), and hook up your sources accordingly.