MBC install [Merged 10-7]

[b00sted99-X]

HERE, DAMMIT!

http://www.dsmtuners.com/forums/showthread.php?t=237982


ok n00b question here.. i got my MBC all hooked up fine (dejon tool.. sweet!) i'm just wondering what to do with the stock boost solenoid hoses.. i took the top one completely off (this is the one that was going to my intake pipe.. then capped that nipple on the pipe) .. the one on the bottom, that tees off and goes to both the wastegate and the turbo housing, is still there. i just bent it backwards and stuck it in the bracket that the top hose was at.. its still connected to the solenoid though. is this alright? can i leave it on there like that will it screw anything up?

 

[FORMONTOYA]

the bottom outlet on the MBC is connected to the hose that connects the wastegate to the intercooler piping. the other end of the MBC is connected to the hose that runs to the top of my greddy rs BOV. i turn the knob all the way in and all the way out and still just running 8-9 psi. what am i doing wrong?

bottom port goes to turbine housing, "j" pipe, or lower ic pipe nipple, side port goes to wastegate actuator. don't hook to the bov at all. if you "t" ed into the ic/wastegate and then ran to the bov you have a pressure source at both ends, then you will be running of actuator spring pressure only.

jim

 

[98GSXboosted]

where are those 3 located?

 

[MrBoxx]

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You'll want a positive pressure source going into the MBC. A good source is from your lower intercooler pipe (the LICP that RRE supplies comes with a nipple for this, but I can't make the same claim for any other brand: SBR, dejon, etc), or from a nipple on the turbo itself (The T25 came with this, the 14b doesn't). The pic above shows an alternate way of hooking up the MBC, from the BOV, but many people say this isn't as reliable. The outlet hose goes to the wastegate actuator. If you get these backwards, you'll just run off wastegate spring pressure, as said before. Also, check for boost leaks.

 

[98GSXboosted]

does the stock licp come w/ a nipple?

 

[MrBoxx]

No, the 2g stock LICP is a soft rubber hose. The nipple is on the compressor housing of the turbo.
On the 1g, the nipple is at the very top of the stock 1g J-pipe, if I remember correctly.

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You can kinda see the nipple on there. But this part is rarely used when a 14b is put on a 2g car. Most people use the whole J-pipe/L-pipe combo that you get with most install kits.

 

[98GSXboosted]

do you have a pic of the compressor housing, and or the nipple off of it, i am so confused

 

[98GSXboosted]

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is it that

 

[91gsxboosted]

i just installed my MBC and its not working. its a simple turn nob T design. the bottom outlet on the MBC is connected to the hose that connects the wastegate to the intercooler piping. the other end of the MBC is connected to the hose that runs to the top of my greddy rs BOV. i turn the knob all the way in and all the way out and still just running 8-9 psi. what am i doing wrong?

You do not hook it up to the BOV at all. All you do is tee it into the line that goes to the wastegate. Cut the line, connect the 2 lines now into the ports, and it should work. Don't forget to hook the BOV back up.

 

[MrBoxx]

Re-reading your original question, it sounds like you have it hooked up backwards. Try switching the two lines. The BOV set-up SHOULD work, though the way it's hooked up in the pic you posted is the BEST way to do it.

 

[98GSXboosted]

I figured it out!!!, all i had to do was cut the line that goes from the wastegate the the part that connects the turbo to the LICP(not sure what that piece is mabey jpipe??) and connect it to the MBC, and i went off boosting, thanks for all help!

 

[never2muchBoost]

hey tom, untuned u can run 16psi safely. over that and u might hit fuel cut. u should be able to do whatever you want if u tune it with that pump in there tho. im glad u finally got my mbc in the mail, i sent it out a while ago. hope yr having fun with my car!!!! dont crash it!!! haha jp

 

[snyper1982]

I bouth a MBC a long time ago, but my stock turbo/wastegate setup nets me 15 psi, so i'm not even going to bother with it til i start pushing more than that.

 

[MrBoxx]

Congrats on the fix! Glad we could help you out a bit.

 

[TEAMONEINC]

Whats up fellas. I have been reading on here for the past few days about installing a MBC. i found a thread from the FAQ guide that help very thorough instructions. however. i bought the Perrin MBC and it conflicts with the directions i read.

The directions i read on our site show that the MBC should be tapped into the bov line that leads to the intake manifold...as well as connected to the actuator.....

On my Perrin instructions...all they say to do, is to unplug the hose from the turbine, unplug the hose from the actuator, and then connect one end of the supplied hose to the compressor side of the turbo housing, and attach to the BC. after that, take the remaining hose and attach to the actuator and then to the other end of the BC.

thats it. it mentions nothing about connecting or messing with any other lines....is this correct, and also, what is the validity of the Perrin gauge. i got it from DSM parts and i have not been able to get a review on it as thorough as the other MBC's out there.

Also, at the same time i install this, i would also like to install my autometer boost gauge as well...i have the pod and all of that, but while looking at the instructions, i have just a few questions...the "T" fitting that connects the gauge to the vacuum line...does the other side of the fitting stay open? it doesnt mention what goes on that side....also, where would i connect the vacuum line that sends the reading to the gauge at regarding my new install of the MBC....


thanks fellas.
Chad.

 

[MrBoxx]

The Perrin instructions are what I believe to be accurate. The pressure side of the boost controller should be hooked up to the turbo compressor housing or a nipple on the intercooler pipe. The other line from the boost controller should go to the wastegate nipple. This is the way I have my TurboXS BS hooked up and it works perfectly. But some people prefer theirs to be hooked up to the BOV line. If it works for them too, then it's just up to your personal preference. If you have a T25, you already have a nipple on your compressor housing, so that's what I would use to make a nice clean install.

Edit: Forgot your second question. Boost gauge -> Barbed adapter fitting -> Rubber vaccuum hose -> through the firewall somehow (I went through the steering column boot) -> plastic T fitting inserted between your fuel pressure regulator and the intake manifold.

 

[K_Hill]

This will show you how to install your MBC and it has pics..

http://www.belitski.com/vfaqhallman.html

 

[TEAMONEINC]

Thanks guys...as for my boost gauge install....I've been reading more and more on here and recently saw a thread that I am supposed to take the "T" fitting and put this in between my intake manifold and fuel pressure regulator. Is this right? The boost can be measured through there? If thats the case, I see that it is easier than my ignorance led me to believe.

 

[K_Hill]

Here is a good link on how to install a boost gauge.

http://www.vfaq.com/mods/wayback/BradBauer/gauges/boost.html

 

[MrBoxx]

Yes, that is generally regarded as the best place to tap into for boost gauges. It will measure Vac and Boost accurately.

Here is a pic that might help you. The black plastic object that the hose leads to is the FPR. The other end of the hose leads to the Intake Manifold.

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[K_Hill]

Yes, that is generally regarded as the best place to tap into for boost gauges. It will measure Vac and Boost accurately.

Here is a pic that might help you. The black plastic object that the hose leads to is the FPR. The other end of the hose leads to the Intake Manifold.

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Very good pic this should help him out alot..

 

[TEAMONEINC]

Thanks alot. Those pics make it pretty impossible for me to mess up. I appreciate all your help. I am gonna take a crack at it tomorrow. I took my spark plug cover off today to take a look there, and the cheap plastic cracked. So the list will go on. I will let you guys know what the outcome is on my stuff. Peace.

Chad.

 

[K_Hill]

Thanks alot. Those pics make it pretty impossible for me to mess up. I appreciate all your help. I am gonna take a crack at it tomorrow. I took my spark plug cover off today to take a look there, and the cheap plastic cracked. So the list will go on. I will let you guys know what the outcome is on my stuff. Peace.

Chad.

Glad I could help.. Yea be sure to post back and tell us how it went.

 

[TEAMONEINC]

Perfect. The MBC install went smooth, and the Boost gauge went smooth for the most part...That cheap air/fuel I am probably just going to put it in the closet or to some Honda kid and buy a different gauge.

Boostin 15psi at full boost but once i pass 5k i drop to 10. Although, the most important thing is that my stutter is gone.

Thanks for all this help. It made the install cake...even with my Honda guys reading the instructions I printed out from you.

Next stop will be a ported exhaust manifold.

Peace!

Chad.

 

[K_Hill]

Perfect. The MBC install went smooth, and the Boost gauge went smooth for the most part...That cheap air/fuel I am probably just going to put it in the closet or to some Honda kid and buy a different gauge.

Boostin 15psi at full boost but once i pass 5k i drop to 10. Although, the most important thing is that my stutter is gone.

Thanks for all this help. It made the install cake...even with my Honda guys reading the instructions I printed out from you.

Next stop will be a ported exhaust manifold.

Peace!

Chad.

I am Glad the install was easy for you!!

 

[Strm Trpr]

Perfect. The MBC install went smooth.

How did you hook up your Perrin MBC?
Did you use the pressure source off of the Compressor Housing, or did you T into your BOV line?
http://www.dsmtuners.com/forums/showthread.php?t=105573 this link states that you should tap into a pressure source after the Throttle Body for some good reasons IMO.

So, if someone wants to chime in and set me straight on the proper way to install a MBC, then by all means, set me straight.
1.) T the BOV line as a pressure source for the MBC? (Long Pressure Line, boost leak test issues.)
2.) Pressure source from after the TB, ie., T into PCV line? (Longer Pressure Line)
3.) Pressure source from Compressor Housing? (Issues with weather changes and other phenomena).