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NG900 & OG9-3 Performance, Mods & Tuning Covers Tuning & Performance modifications for the NG900 (1994 to 1998) & OG9-3 (1999-2002) & '03 Convertible

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  #1  
Old 26th February 2006
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Default Installing MBC+A?

I know, I know, asked a million times but...

How do I go about installing the whole MBC+A system on a 1996 900SE? The previous pages I've found have had no pictures, assuming that the pictures are old and have been automatically removed for server space...

So... can anyone help?!

Cheers!
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  #2  
Old 26th February 2006
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Is this Dead's old system? This is not one of my kits so things are slightly different.

If so, I don't think he was tapped off at the TB for Boost. Therefore, you are only using the two lines off of the BPC. Pull the one coming from the lowe pressure side of the turbo and connect it to the first tee on the MBC and APR inlet side. Connect the outlet tee off the MBC/APR outlet side to the hose going to the WGA.
Close off the APR completely to set your MBC. Once that is set, start to open up the APR slowly unmtil boost is reduced. Then back off the apr and you are set.

PM if you have problems.
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  #3  
Old 27th February 2006
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Yep, it is from DC...

LINKY LINKY

Above is the Ebay page, with a picture of what I received...
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  #4  
Old 28th February 2006
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Yes youg Jedi it is Deads old MBC. When I left I was but a learner...Now I am the master.....

Yep SPATL is correctomundo. It was tapped at the throttle body. The actual kit should still be set for my old dead black 900. There will be a white mark on the A valve. This was set easily the controller was also removed and placed on the shelf without tampering. I realise not all engines are the same.

Sadly I do not have any pictures of the install. I did follow the shots from the old MP site. Worked a treat BANNNNNNNG oh and look at him go.

Dead
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  #5  
Old 28th February 2006
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Hi matey!

Can anyone give me a link to the pictures on the MP site, as I can't find any!

It might have been set, but my brother (ever curious!) has adjusted the +A bit back and forth now, so it'll need setting anyways (as you say, each engine is different so no bad thing!)
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  #6  
Old 28th February 2006
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The other dark lord Eric

This is just installing the Manual controller.

There seems to be no shots or images go on SPATL get your mouse working do Storm a drawing.

Dead
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  #7  
Old 28th February 2006
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Pretty please?!
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Old 1st March 2006
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First tell me if a TB tap is used to tap boost for the MBC.


If not, it is as described above.

Hose from turbo to inlet of first "Wye" on inlet side of MBC and APR.

Second "Wye" off outlet side of MBC and APR goes to WGA hose.
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  #9  
Old 1st March 2006
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Quote:
Originally Posted by SPATL
First tell me if a TB tap is used to tap boost for the MBC.


If not, it is as described above.

Hose from turbo to inlet of first "Wye" on inlet side of MBC and APR.

Second "Wye" off outlet side of MBC and APR goes to WGA hose.
Pass on the TB tap question!

What is a "wye"

Cheers SPATL!
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  #10  
Old 1st March 2006
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I use "wyes", yours has Hose "Tees"its the barbed connection that joins two hoses into one.
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  #11  
Old 1st March 2006
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hay spatl, that mbc is 1 of the 2 you posted to me way back, do you remember ? stormcrow will be the third owner of it

storm' wyes = Y connector & tees = T connector
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  #12  
Old 1st March 2006
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Yes, I remember well. I knew that. What I was trying to get at is that it is a different configuration for hose routing then the MBC+A system I make. Thsi one does not use a TB pressure tap which splits the lines. There is only one wye barb in my setup. This has two.
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  #13  
Old 1st March 2006
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Can it be converted to your system? I'm very new to all this Turbo stuff and don't really have a clue what I'm doing so a complete idiots guide would be very useful...

SPATL, could you show me a picture or something of your version so I can compare it??

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  #14  
Old 1st March 2006
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LINKY

This seems simple enough, if someone can explain all this TB tapping etc and which hoses to connect to which it would be fine!!

EDIT: Just seen the diagram on page 2 of the above link, now I get it!

Will attempt to fit and tune it tomorrow...
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Last edited by StormCrow; 1st March 2006 at 07:13 PM.
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  #15  
Old 3rd March 2006
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I don't know where you found that link...That is my original MBC before I came up with the +A stuff. Wild.

I'll see what I have, maybe I can throw it up on shutterfly.
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  #16  
Old 3rd March 2006
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Found it linked on TSL's forum IIRC.

Ok. Had a look last night, but have a few questions to be certain of what I'm doing.

Now I understand that there are several ways of doing this. I was planning on connecting the MBC to the hose that goes to the Turbo (is it the C hose on the BPC - the one on the end...)

The two units (MBC+A) will be connected together via a T-piece/wye valve and then on to the wastegate.

The anticipator will be taking boost from the hose between the IAC and the TB...

Is this right?!
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  #17  
Old 3rd March 2006
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No actually backwards.


1.Connect the hose from the turbo to the APR inlet

2. Connect the TB tap hose to the MBC inlet

3. Connect MBC outlet and APR outlet to the "wye" /"Tee" barb.

4. Connect the combined Tee to the WGA.

You want to take pressure from the TB area for the MBC as it is closer to what the MAP sees. Due to the pressure drops across the IC, he pressure is slightly more linear. Thsi allows a more stable boost at higher rpms. But due to the time delay with the longer hose off the TB, the APR will help prime the lines so that when the MBC lifts off, there is no delay cracking openthe WGA.
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  #18  
Old 3rd March 2006
leakslikasieve leakslikasieve is offline
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so without getting flames for this, can anyone tell me what the +A stands for? i know mbc is manual boost controller. just not sure about the add on to that. thanks guys.
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  #19  
Old 3rd March 2006
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Finally a question I can answer on this subject!

The +A means Anticipator - basically its a valve which runs in parallel with the MBC and it half opens the wastegate so that when max pressure is reached the WG can open VERY quickly compared to the slower time without it, this means no boost spikes which can damage the engine...



Quote:
No actually backwards.


1.Connect the hose from the turbo to the APR inlet

2. Connect the TB tap hose to the MBC inlet

3. Connect MBC outlet and APR outlet to the "wye" /"Tee" barb.

4. Connect the combined Tee to the WGA.

You want to take pressure from the TB area for the MBC as it is closer to what the MAP sees. Due to the pressure drops across the IC, he pressure is slightly more linear. Thsi allows a more stable boost at higher rpms. But due to the time delay with the longer hose off the TB, the APR will help prime the lines so that when the MBC lifts off, there is no delay cracking openthe WGA.
Cheers SPATL - that makes complete sense now - THANK YOU!

One more question if I may - bit of a silly one but here goes! The MBC I have (as in the Ebay auction) isn't a typical T setup like usually found, it has a bend on one end and the actual unit itself is straight. Which is the inlet?!
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Slightly tweaked

1989 Saab 900i 16v Auto - Red
Standard as the day it was born - my Sunday car!
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  #20  
Old 3rd March 2006
leakslikasieve leakslikasieve is offline
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Quote:
Originally Posted by StormCrow
Finally a question I can answer on this subject!

The +A means Anticipator - basically its a valve which runs in parallel with the MBC and it half opens the wastegate so that when max pressure is reached the WG can open VERY quickly compared to the slower time without it, this means no boost spikes which can damage the engine...

ah sounds like a pretty important device.. where can you pick one up from?
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