Unlimited boost or no boost

[sadc]

I have a t3 garrett turbo. And i have a manual boost controller. So it came with the boost controller and a t-line. So i can slip the hoses one to the waste gate other end to the controller itself and 1 going back to the hole outlet for the turbo. Now When i dont have the t-line connect and i just have the MBC connected straight to the wastegate. Then the other end tee'd off from my BOV to my throttle body. When I do this I just have stright PSI. Meaning my pressure just keeps building.
But when i dont tee off the waste gate,MBC, and back to the turbo outlet. I get no PSI. Maybe like 1lbs. So what could be causing the problem?

 

[CTP]

That made almost no sense, so can you draw something in MSpaint to show how you have it hooked up each way?

 

[Black95awd]

WTF you did what? to who? for how many cookies? in who's back yard??

 

[xdxoxuxgx]

WTF you did what? to who? for how many cookies? in who's back yard??

, yeah a better description/drawing may help us diagnose your problem a bit easier

 

[silver bullit]

1 Dont tee your mbc in your bov
2 are you sure you are hooking it up correctly
3 pic of your set up and how you got it hooked up

 

[sadc]

sorry about that guys


heres my setup as off right now
My MBC is tee'd off of my BOV and my other outlet on my MBC is going straight to my wastegate.

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right now my MBC looks something like this. Its not a home made one.

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Some thing like this picture. Only thing is that the lines are differnt. As in the bottom of the my MBC is going to my wastegate instead of the BOV like the picture shows.

On my MBC it shows an arrow pointing at the last outlet and it says "this line goes to wastegate." So thats how I know I'm doing it correctly . But its not working
So as of right now. Im running it as unlimited boost. The boost just keeps building till I shift gears

 

[sadc]

and another thing. You see that thing on top of the turbo outlet. Do I need that? Thats what i was talking about early in my post. When I ALSO tee off that from the MBC i get no boost. So what the heck. Ill have more pictures later on my setup.

 

[forcefed4]

Take the tee out of the bov line. Reconnect the bov line to the intake mani. Go from the nipple on the outlet of the turbo to the mbc to the wastegate.

What kind of MBC do you have?

EDIT- you can also go from the nipple on the outlet of the turbo to the wastegate and not hook up the mbc. You should then have boost up to whatever spring pressure is in the wastegate.

 

[welfle18]

Plug in your teed line from the bov to the nipple on the compressor housing. Then fix the line you teed into. Then you should be set!

 

[sadc]

Take the tee out of the bov line. Reconnect the bov line to the intake mani. Go from the nipple on the outlet of the turbo to the mbc to the wastegate.

What kind of MBC do you have?

EDIT- you can also go from the nipple on the outlet of the turbo to the wastegate and not hook up the mbc. You should then have boost up to whatever spring pressure is in the wastegate.

I was running it like that. I had little to no boost. And i was getting compressor surge

 

[forcefed4]

I was running it like that. I had little to no boost. And i was getting compressor surge

Which way?

For now just forget about the MBC and hook uo the wastegate to the nipple on the compressor outlet. Then see what it does.

 

[sadc]

that way you are talking about right now.....the wastegate to the compressor houseing. I get little to no boost at all

 

[dsmconvict]

For a mbc your not supposed to tee into the bov. Hook it up to the compressor housing then adjust it. Hook up the wastegate to the compressor housing then proceed from there. Then hook up the mbc and adjust it.

 

[sadc]

so this is how i have my setup right now which is giving my unlimited boost.

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red tube is going to wastegaste
black tube is tee'd off from BOV

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[dsmconvict]

Hook the black hose into the compressor cover. Then hook the bov directly to the intake manifold. The way you have it setup wont let the wastegate open hence the unlimited boost situation. Try adjusting the mbc once you hook it up the right way.

 

[Mr Peepers]

First off, that's a ridiculous amount of hose between the boost source and wastegate. Even if you did properly set the MBC it would likely spike.

From how your MBC is affecting boost in its current setup, I'm going to guess it's a bleeder type.

Test this by trying to blow through the MBC inlet, see if tightening the adjustment knob makes less air come out. Also, see if there is a difference blowing through either inlet/outlet. If there is a difference, it's likely a ball and spring type, if not, continue on:

Using the least amount of tubing possible, connect a line directly between the MBC and wastegate. Put a T fitting in this line. Run the line from the T into one side of the MBC and leave the other side open. Have the MBC adjusted so no air can pass through it(should be all the way to the right/tightened). When you test it out, it should act exactly the same as with a line directly to the wastegate. Now slowly turn it out a little to the left and check what psi you get. Rinse, wash, and repeat until desired boost is achieved. Be sure to go in small increments.

EDIT: Nevermind, The hole in the side looks like a bleeder hole for a ball and spring MBC. You have it hooked up wrong, swap the nipples on the MBC.

 

[sadc]

is this what your saying? and only do this if this is not a spring and ball type. What if it is?

well heres my getto drawing

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[Mr Peepers]

No, have one line going to the compressor cover, one going to the WG, and the other to the MBC.
IF it's a bleeder type.

First, try swapping the lines on the MBC and see if it helps. If it helps, it's a ball and spring type.

 

[welfle18]

well first off if you dont have that nipple covered on the compressor housing you are only gonna see little to no boost. Its acting like a big boost leak. Take the black line and hook it to your compressor housing to see if that works. If that doesnt switch the two lines around and hook your BOV line back to the IM.

 

[sadc]

well first off if you dont have that nipple covered on the compressor housing you are only gonna see little to no boost. Its acting like a big boost leak. Take the black line and hook it to your compressor housing to see if that works. If that doesnt switch the two lines around and hook your BOV line back to the IM.

As of right now. I dont have that nipple coverd. the one by the compressor housing. And its giving my unlimited boost right now

 

[welfle18]

As of right now. I dont have that nipple coverd. the one by the compressor housing. And its giving my unlimited boost right now

I guess I am not getting what you are saying. When I first hooked my MBC up I hooked it up the way you are now by teeing into the BOV line. I forgot to cover the nipple on the compressor housing, causing a massive boost leak as I found out when I did my boost leak test. I reconfigured the way I had it set up by running the line I had teed into the BOV to the compressor housing and I went from only running 10 psi to now (which is 15 psi). Do a boost leak test and you will see that there will be a huge gush of air out of the compressor housing.

 

[Raph]

Do this and go for a test run.. make sure the mbc is the right way around..


Stop teeing stuff into yout BOV.

 

[CTP]

Looks like a Turbosmart knock-off. That style is supposed to come with the boost tee fitting and gets hooked up like this:

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All the intructions you need are on Turbosmart's site.

 

[welfle18]

Do this and go for a test run.. make sure the mbc is the right way around..


Stop teeing stuff into yout BOV.

That is excatly the way I have mine hooked up and that is how I was trying to explain it. Thank you for the visual.

 

[98eclipsekidd08]

Do this and go for a test run.. make sure the mbc is the right way around..


Stop teeing stuff into yout BOV.

thats what i was waiting for someone to show, that should work no problem