BOV questions, it's only thing I have to use right now! :-/

[253.Asmo]

Very close to finally firing up my rebuilt EJ22T, and I mistakenly bought a turboxs bov which appears to be 100% atmospheric. I'll post a picture up here in a bit.

Question is, can I get away running this for a week until I can get a suitable bpv and adapter to hook up to my intercooler. It's a less than ideal situation, but this will be ran during engine break in anyways, so it's not like i'll be hitting much more than a few pounds of boost...?

Problems, suggestions?

Also, with this 2-port mbc, and the bov, I'm not entirely sure how my vacuum lines will go.

mani vac --> mbc -->wastegate

what about the bov?

Thanks in advance.

Matt

[asc_up]

You'll be fine running a BOV. I've been running one for over a year now without any problems and so have many other members on the board.

You'll need to connect a vacuum source to the BOV. Just use the vacuum source for the stock BPV.

For connecting the MBC, choose a vacuum source (such as the nipple on the side of your turbo that's meant to be used as a vacuum source for a boost controller) and attach it. Then attach another hose that goes to the wastegate to the other port on the MBC. You'll have to read the directions so you don't cross the lines though.

[vrg3]

Like Aaron says, use the stock bypass valve's vacuum line for your blowoff valve. You'll just have to cap the return fitting.

As for the MBC, hold up -- you don't want to connect it to the intake manifold. You don't want to connect it to a vacuum source. You want to connect it to the nipple on the side of the turbo that, like Aaron says, is for this purpose. It's not a vacuum source though. But, in any case, yes, hook it up to that nipple on the compressor outlet and to the nipple on the wastegate actuator in the correct direction, and cap off the boost bleed fitting that the stock boost control solenoid went to. Or just cap off the two fittings on the solenoid that you're now disconnecting.

Have you seen my vacuum diagram?

[asc_up]

Ah sorry about my poor wording. Out of curiosity, what IS it called? A pressure source? I just want to start using the correct terminology haha.

[vrg3]

I suppose you could call it a pressure source or a boost source, but that's still more general (a nipple on the outlet of the intercooler would also be a pressure or boost source). I usually just call it "the nipple on the compressor outlet."

[asc_up]

Haha ok. Can't you technically hook up any line that provides pressure/boost to an MBC, though?

[vrg3]

You can do whatever you want, but connecting it to the intake manifold will make the turbo overboost and heat soak the intercooler and adversely affect driveability as the feedback system causes it to try to pressurize the intake manifold through a partially closed throttle. This is the infamous PTFB issue.

[253.Asmo]

I have seen your vacuum diagram vikash, very useful. Took me little while to collect all the diagrams, parts manuals and reference photos I now have sitting on my computer

yeah I'm not sure why I got manifold vacuum in my head, ill be connecting it from turbo nipple to wgate. At the moment I just have a line running between to leave it at wgate boost, haven't been to store in awhile for more hose !

M