overboosting with n75 and mbc

1999 a4 1.8t aeb dbc with ko3 with 1/2 bigger compressor. overboosting with n75 at 15-20 psi. Installed mbc  without n75 and with it shut all the way it'll still hit 20psi. I get 17963 dtc says maximum overcharge limit exceeded. Everthing else is stock now looking towards audi tt DV and BPV from what I read they are better then my stock ones. I am thinking MBC is junk I hooked up the tee with the arrow towards wastegate otherside towards the TN. Here is a pick of it. I assume it is garbage but want to be sure. Thanks in advance. BTW I got an autometer boost gauge if that helps
 

there have been alot of people with issues with that one

you are also gona fvck your engine up. unless you do the diode mod (which you cant) or get a chip you can't run 20psi. all your doing is cranking up boost without altering the timing or fuel. 

If I got a better mbc could I lower the boost to stock levels say 8-10 psi. Any recommendations for an MBC? Or because the the bigger compressor I have no choice but to chip. Thanks for the replies I really just need it to get my ass to work for now.
Turbo Kraut Do you mean issues with the turbo or MBC? Thanks

i have heard from some people that those, which i just recieved one after finding this out... got mine today, found out after ordering, but i am going to run it anyways... and when it craps, i will just replace the controller, since i will run the tubing and all
 
but i think cincytt said he just replaced his brothers, cause it quit working and he said he knew of a few more
 
also yes unless you chip/tune your car, you need to go back down to 10 psi max i would say.... and that might be pushing it..... a good tune, apr/giac will remap everything and saftley give you 17 psi...... ask jeff...... that is his username, he turned his boost up w/ just a mbc and blew some stuff up

Please let me know how it works out and how you hooked it up. I used the bleed method maybe that was a bad idea. Thanks for the input

No, the bleed style are what you want for a stock turbo.  Dont let a bad mbc give you false beliefs

Cincytt,
       Turbo Kraut said you have had experience with that one on your brothers car. Is the one I got a bleed style mbc? I know it says its gated on the web that I got it from but when I took the tee apart it had a ball and spring. I heard it exhaust from the mbc when I opened it, the controller seemed ok but I really have my doubts about that tee.  Do you recommend a certain MBC?
 
 

not to thread jack, but, since i have a chip, i can use a MBC to up my boost and the ecu will adapt?

quote:

ORIGINAL: awwdii
I am thinking MBC is junk I hooked up the tee with the arrow towards wastegate otherside towards the TN. Here is a pick of it. I assume it is garbage but want to be sure. Thanks in advance.

I actually have a simpler Turbosmart unit:
http://www.dsmtuners.com/parts/product_info.php?name=MBC&products_id=880

This has been running well for me. Boost build-up is linear and I have the flexibility to adjust depending on the situation: ex. 18.5PSI during the summer & track sessions, while I go for 22PSI during colder months.

Double check the lines.

quote:

ORIGINAL: mr.cAp
not to thread jack, but, since i have a chip, i can use a MBC to up my boost and the ecu will adapt?

Assuming that you leave the N75 plugged-in (w/ lines disconnected) while running a MBC: the ECU will demand a certain boost level from the N75 since it is connected electrically, but your MBC will be running the show, so expect a bit of discrepancy (depending on what level your MBC is set at).

I might need to be corrected on this but I am assuming that gated controller has a ball and spring but will bleed out as well. And ball and spring type controllers will not bleed out. Monk you just hook the controller between TN and Wastegate w/o a tee right? Thanks for the link for turbosmart
 
 

quote:

ORIGINAL: awwdii

Monk you just hook the controller between TN and Wastegate w/o a tee right? Thanks for the link for turbosmart

TN? 'turbo nipple' on the compressor side? If this is what you mean, then yes . ..The MBC goes between the TN and wastegate. No need for a 'T'. Just plug the line on the TIP and your set. Stay conservative until you get chipped or go BT w/ software.

Cool thanks Monk will keep you posted when I got some things done.

quote:

ORIGINAL: awwdii

Cincytt,
      Turbo Kraut said you have had experience with that one on your brothers car. Is the one I got a bleed style mbc? I know it says its gated on the web that I got it from but when I took the tee apart it had a ball and spring. I heard it exhaust from the mbc when I opened it, the controller seemed ok but I really have my doubts about that tee.  Do you recommend a certain MBC?

 
Yes, gated = bleed.  It took us forever to get it to work and it recently pooped out.  Wasnt worth the effort.  The turbonetics variable mbc is a bleed style and is about $50 on ebay

Would this be the one your talking about?
 
 
 

 

Thats the one.  THere is a guy in the TT section that runs it and likes it.  Works well for him.

i thought about that one, but was is the third hole for?   if it is for nothing and you plug it...... with what? there is nothing in that kit that you would be able to plug it with
 
 
like i said, i have one similar to the one in the pic up in like the first post...... and i will run it till it is junk, then come back and replace it with something better

It comes with plugs.  It lets you pick which way it mounts is all. 

then i will probably get that, in a few weeks after all the "bills" settle down and the wife forgets how much i just recently spent

Yeah it almost looks like an air compressor pressure adjuster but I am sure the internals are different. I am picking up the audi tt DV tomorrow then I will pick up that turbonetics to lower my psi. Hopefully it works Thanks for all the help guys will keep you posted on progress.  I still