AH FabricationsJMB Retrofits
Page 1 of 2 12 LastLast
Results 1 to 40 of 43

Thread: mbc install

  1. #1
    s3dave's Avatar
    TFSI Hybrid

    Status
    Offline
    Join Date
    Nov 2009
    Location
    west yorks
    Posts
    10,121

    mbc install

    had a go at fitting one with poor results....
    fitted direct and could only get 8psi out of it... i left the n75 valve electrically connected
    what have i done wrong??
    Last edited by s3dave; 13th June 2010 at 18:00.

  2. # ADS
    ADS
    Join Date
    Always
    Location
    Global
    Posts
    Many
     
  3. #2
    Andrew@A.L.D's Avatar
    Cylinder Head Master

    Status
    Offline
    Join Date
    Jun 2009
    Location
    Leeds
    Posts
    3,470
    where did you plump it in?
    RIP S3dave/David Marshall stickers now available

    FOR SALE
    None resonated Milltek exhaust,
    Adjustable FPR from 1-5 bar, 2 sets of Unused ARP 3/8 2000 rod bolts, relentless 200 cell cat pipe, Std AGU Crankshaft. Ported & Reconditioned Cylinder head service.

  4. #3
    s3dave's Avatar
    TFSI Hybrid

    Status
    Offline
    Join Date
    Nov 2009
    Location
    west yorks
    Posts
    10,121
    i just took the pipes off the n75 the charge/boost pipe, and plugged that into the vertical barb on the mbc and pulled the pipe of the n75 that goes to the actuator and pluggled that into the right angle of the mbc
    should i have blocked the n75 open tubes?

  5. #4
    <tuffty/>'s Avatar
    Badger 5 Edition

    Status
    Offline
    Join Date
    Sep 2008
    Location
    Gloucestershire
    Posts
    15,591
    What MBC have you got? put simply, take the pipe from the bottom of the N75 and connect to the boost side of the MBC then the outlet goes to the pipe connected to the smaller side outlet of the N75... leave the longer side outlet of the N75 connected to the TIP and block off the other 2 (this stops vacuum leaks)...

    Make sure the MBC is set low then work up from there...

    If you are only getting 8psi I would imagine you must have it wound right in or tripped limp mode as thats actuator pressure... the same as connecting the boost pipe straight to the actuator..

    <tuffty/>
    Silver 2001 AMK S3. Silver alcantara interior... now with added powarrrrrrrr, torques. VAGCOM + KII-USB. >> My build thread...

  6. #5
    s3dave's Avatar
    TFSI Hybrid

    Status
    Offline
    Join Date
    Nov 2009
    Location
    west yorks
    Posts
    10,121
    thats how i have done it but i did not block the n75 up.. i did have it screwed right down i thought that was more boost... i will try again tomorow cheers

  7. #6
    Sandip's Avatar
    6th Gear

    Status
    Offline
    Join Date
    Nov 2006
    Location
    Greater Manchester
    Posts
    2,379
    Interesting What are the main benefits for having a mbc, if my car is boosting 19psi how would a mbc help?
    3.2 V6 with Custom Code VVT Attack Software


  8. #7
    s3dave's Avatar
    TFSI Hybrid

    Status
    Offline
    Join Date
    Nov 2009
    Location
    west yorks
    Posts
    10,121
    Quote Originally Posted by sandip View Post
    Interesting What are the main benefits for having a mbc, if my car is boosting 19psi how would a mbc help?
    you can manually turn your boost up/instead of the ecu telling it how much with one, but must be made aware of the consequences of overdoing it on standard internals

  9. #8
    Sandip's Avatar
    6th Gear

    Status
    Offline
    Join Date
    Nov 2006
    Location
    Greater Manchester
    Posts
    2,379
    Quote Originally Posted by s3dave View Post
    you can manually turn your boost up/instead of the ecu telling it how much with one, but must be made aware of the consequences of overdoing it on standard internals
    Hmmm may have to purchase one on these
    3.2 V6 with Custom Code VVT Attack Software


  10. #9
    Chugger

    Status
    Offline
    Join Date
    Nov 2009
    Location
    North Devon
    Posts
    2,716
    I have read of people coupling these in parallel with N75 to give better delivery apparently. Surly if the boost diviates command boost its just going to bring on limp mode though.

    Slighty off topic but if any body knows, does the S3 management limit boost in lower gears like some cars?
    57 A3 2.0 TDI Sportback (140)

  11. #10
    Broken Byzan's Avatar
    Photographic Moderator

    Status
    Offline
    Join Date
    Apr 2004
    Location
    Cardiff, United Kingdom
    Posts
    12,522

    My Social Networking

    Follow Broken Byzan On Twitter Add Broken Byzan on Facebook Add Broken Byzan on Google+ Visit Broken Byzan's Youtube Channel
    The management doesn't know what gear you are in, just how much load you are applying by measuring manay factors.

  12. #11
    Chlippo's Avatar
    3rd Gear

    Status
    Offline
    Join Date
    Apr 2010
    Location
    Canada/USA/Lebanon
    Posts
    666
    I am very interrested getting a mbc (forge unos style) on my stock car.
    I would try get some more boost without mapping the car.
    I need someone to confirm me on this one, when mbc installed, and setted for lets say 10 psi more than the stock, will the ecu throw an order to get more fuel injected to covver the extra boost?

  13. #12
    RIP S3dave

    Status
    Offline
    Join Date
    May 2004
    Location
    nr Glos
    Posts
    7,181
    the ecu will drop into limp is <>250mb of requested is seen, so what you propose wont work, whilst also being stupid to try on youre engine without ign and fueling to suit
    **http://www.facebook.com/Badger5Ltd**

    NEW NEW NEW eShop now LIVE>
    www.badger5.biz

    Badger 5 Ltd, Queen Annes Gate, Oldends Lane, Stonehouse, Glos, GL10 2DG


    http://www.badger5.co.uk, Tel:01453822880
    bill@badger5.co.uk
    **NEW** Badger5 Section CLICK here>> http://www.audi-sport.net/vb/213-badger-5/

  14. #13
    Chlippo's Avatar
    3rd Gear

    Status
    Offline
    Join Date
    Apr 2010
    Location
    Canada/USA/Lebanon
    Posts
    666
    I wont gonna try 25 PSI and expect my engine to run great! just a couple of psi's

    If the ecu wont cover anything, what is the main goal of installing the mbc.
    After i remap my car, dpipe, panel filter, 007 forge, i was thinking getting an mbc and set it at the same boost level as my map. (maybe 20 psi)

    Thanks Bill for the info i needed someone to get my ideas more clear

  15. #14
    Danny Cawsey's Avatar
    Cawsey

    Status
    Offline
    Join Date
    Dec 2009
    Location
    Valencia, Spain
    Posts
    497
    sorry to hijack but has anybody fitted an electronic boost controller to there s3 and which one to go for?
    i have a 1999 apy s3 stage 2 would it be safe to to run one?

  16. #15
    RIP S3dave

    Status
    Offline
    Join Date
    May 2004
    Location
    nr Glos
    Posts
    7,181
    EBC's can be good, however, just adding one to an unmapped car wont help much, as the deviation in request vs actual will drop into limp mode.
    some maps have the limits mapped out, most dont, so its not 100% adding an ebc to get external control, will be successfull. taking away the ecu's ability to control its boost can cause other drivability issues.
    MBC being added to clip a spike however is quite sensible, and tweaking to the limit of the ecus limp mode threshold is possible, BUT, must be done in conjunction with logging of fueling and ignition timing pull to avoid disaster.

    std rods and spikes of boost/torque are not a happy pairing.
    **http://www.facebook.com/Badger5Ltd**

    NEW NEW NEW eShop now LIVE>
    www.badger5.biz

    Badger 5 Ltd, Queen Annes Gate, Oldends Lane, Stonehouse, Glos, GL10 2DG


    http://www.badger5.co.uk, Tel:01453822880
    bill@badger5.co.uk
    **NEW** Badger5 Section CLICK here>> http://www.audi-sport.net/vb/213-badger-5/

  17. #16
    Chlippo's Avatar
    3rd Gear

    Status
    Offline
    Join Date
    Apr 2010
    Location
    Canada/USA/Lebanon
    Posts
    666
    Got that sir! Thanks again
    I will forget about the mbc for now, since i am not really able to get logs of fueling and timing, and cant see any advantage in having one even if the car is mapped and got some little mods

  18. #17
    Danny Cawsey's Avatar
    Cawsey

    Status
    Offline
    Join Date
    Dec 2009
    Location
    Valencia, Spain
    Posts
    497
    cheers badger for the info.

  19. #18
    6th Gear

    Status
    Offline
    Join Date
    Sep 2009
    Location
    Essex
    Posts
    2,366
    i think prawn was posting a couple months back that with an MBC his was holding consistent boost to the red line etc but does it get rid of the ko3's stupid tendency to spike the boost?

    im tempted with an MBC if i can even out the boost delivery

  20. #19
    Westy's Avatar
    Double Dark Side! Diesel & 8P

    Status
    Offline
    Join Date
    Dec 2008
    Location
    Cambridgeshire sometimes Hertfordshire
    Posts
    17,280
    These babies used to be known as the "wheel of fortune" back in my R5 Turbo days! You wind it up too much and pop
    8P A3 TDI - 220bhp - 335lbft
    A3 Maintenance Thread
    Bye bye S3 you will be missed.
    S3 Build Thread







  21. #20
    Welly's Avatar
    VX220 SC Driver :)

    Status
    Offline
    Join Date
    Aug 2009
    Location
    Gloucestershire
    Posts
    10,695
    Quote Originally Posted by Matt82 View Post
    i think prawn was posting a couple months back that with an MBC his was holding consistent boost to the red line etc but does it get rid of the ko3's stupid tendency to spike the boost?

    im tempted with an MBC if i can even out the boost delivery
    That can be done, but if thats what you're after then it can be run in parallel with the N75 to even out boost spikes.
    ------------------------------------------------------------------------------------------
    "Marriage is like a coffin and each kid is another nail."
    Homer Simpson





  22. #21
    6th Gear

    Status
    Offline
    Join Date
    Sep 2009
    Location
    Essex
    Posts
    2,366
    can you point me in the direction of the right info? id love to know more

    hmmm boost guage. i dont want her car looking like the set from 2 fast 2 furious!

  23. #22
    Welly's Avatar
    VX220 SC Driver :)

    Status
    Offline
    Join Date
    Aug 2009
    Location
    Gloucestershire
    Posts
    10,695
    Quote Originally Posted by Matt82 View Post
    can you point me in the direction of the right info? id love to know more

    hmmm boost guage. i dont want her car looking like the set from 2 fast 2 furious!
    Good info here:

    http://forums.audiworld.com/showthread.php?p=13285925

    That should be all you need, the diagram says it all. A picture says a thousnad words and all....

    The boost curves are interesting too....
    ------------------------------------------------------------------------------------------
    "Marriage is like a coffin and each kid is another nail."
    Homer Simpson





  24. #23
    Chlippo's Avatar
    3rd Gear

    Status
    Offline
    Join Date
    Apr 2010
    Location
    Canada/USA/Lebanon
    Posts
    666
    lol so to conclude: Mapped S3 + MBC (any of those even a cheap one) is supposed to run better and safer than an S3 without the MBC, In parallel with the N75.

  25. #24
    Chugger

    Status
    Offline
    Join Date
    Nov 2009
    Location
    North Devon
    Posts
    2,716
    apparently, but cant see it myself. If you have a good map that should give same results. Like said if the boost levels diviate the mapped levels by 250mb, then it will throw in limpwilly mode then the car will be no fun at all.

    Not sure about prawn having an MBC on his agu, but he did fit a EBC on it with poor results, apparently it was just crap on part throttle.
    57 A3 2.0 TDI Sportback (140)

  26. #25
    Welly's Avatar
    VX220 SC Driver :)

    Status
    Offline
    Join Date
    Aug 2009
    Location
    Gloucestershire
    Posts
    10,695
    Quote Originally Posted by sportstractor View Post
    Not sure about prawn having an MBC on his agu, but he did fit a EBC on it with poor results, apparently it was just crap on part throttle.
    I had one on my old AGU and also had crappy result on part throttle. That is what the MBCs lack. Adaptability. The ecu knows you are at part throttle, so doesn't give the turbo full chat.

    MBCs are either on or off basically, which makes part throttle riving less enjoyable.
    ------------------------------------------------------------------------------------------
    "Marriage is like a coffin and each kid is another nail."
    Homer Simpson





  27. #26
    <tuffty/>'s Avatar
    Badger 5 Edition

    Status
    Offline
    Join Date
    Sep 2008
    Location
    Gloucestershire
    Posts
    15,591
    Part throttle on mine is certainly different but not undrivable on mine... maybe the later spool of my BT helps matters here but the car is certainly more responsive but perfectly well behaved off load..

    <tuffty/>
    Silver 2001 AMK S3. Silver alcantara interior... now with added powarrrrrrrr, torques. VAGCOM + KII-USB. >> My build thread...

  28. #27
    s3dave's Avatar
    TFSI Hybrid

    Status
    Offline
    Join Date
    Nov 2009
    Location
    west yorks
    Posts
    10,121
    Quote Originally Posted by sportstractor View Post
    apparently, but cant see it myself. If you have a good map that should give same results. Like said if the boost levels diviate the mapped levels by 250mb, then it will throw in limpwilly mode then the car will be no fun at all.

    Not sure about prawn having an MBC on his agu, but he did fit a EBC on it with poor results, apparently it was just crap on part throttle.
    i think most stage two have the diveation deleted from the ecu even stage 1, i know mine as gone ...fact ...lol

  29. #28
    s3dave's Avatar
    TFSI Hybrid

    Status
    Offline
    Join Date
    Nov 2009
    Location
    west yorks
    Posts
    10,121
    no luck with my mbc it must be broke.... i will make my own......cheers fleabay....lol

  30. #29
    Chlippo's Avatar
    3rd Gear

    Status
    Offline
    Join Date
    Apr 2010
    Location
    Canada/USA/Lebanon
    Posts
    666
    Ill buy one of the forge unos with the 007 DV and after i get my remap and the 3" dp, i will set it a tiny bit higher than the map values...see what it gives.

  31. #30
    Welly's Avatar
    VX220 SC Driver :)

    Status
    Offline
    Join Date
    Aug 2009
    Location
    Gloucestershire
    Posts
    10,695
    The MBC I bought from ebay was also useless, but on the other hand, bought one from there in the past and it was great.

    A bit hit and miss. The one I had was made by Powertek - wouldn't hold a stable boost setting AT ALL.

    Last one I had was made by R Spec and was 100% bloody brilliant.
    ------------------------------------------------------------------------------------------
    "Marriage is like a coffin and each kid is another nail."
    Homer Simpson





  32. #31
    s3dave's Avatar
    TFSI Hybrid

    Status
    Offline
    Join Date
    Nov 2009
    Location
    west yorks
    Posts
    10,121
    yeah same here bought one for my golf that was spot, on this one is

  33. #32
    <tuffty/>'s Avatar
    Badger 5 Edition

    Status
    Offline
    Join Date
    Sep 2008
    Location
    Gloucestershire
    Posts
    15,591
    Forge UNOS ftw

    I had probs initially when using the softer spring but changed it to the supplied harder spring and mine is rock solid 1.7bar on boost

    <tuffty/>
    Silver 2001 AMK S3. Silver alcantara interior... now with added powarrrrrrrr, torques. VAGCOM + KII-USB. >> My build thread...

  34. #33
    s3dave's Avatar
    TFSI Hybrid

    Status
    Offline
    Join Date
    Nov 2009
    Location
    west yorks
    Posts
    10,121
    just fitted another... whoop whoop 27psi all the way baby and got the car drifting on boost...
    need to watch intake temps now as i have no fmic yet
    Last edited by s3dave; 18th June 2010 at 12:44.

  35. #34
    <tuffty/>'s Avatar
    Badger 5 Edition

    Status
    Offline
    Join Date
    Sep 2008
    Location
    Gloucestershire
    Posts
    15,591
    Quote Originally Posted by s3dave View Post
    just fitted another... whoop whoop 27psi all the way baby and got the car drifting on boost...
    need to watch intake temps now as i have no fmic yet
    You have rods? I would seriously turn down the boost if you haven't and get logging the fuelling in VAGCOM... intake temps will be the least of your problems mate to be fair...

    <tuffty/>
    Silver 2001 AMK S3. Silver alcantara interior... now with added powarrrrrrrr, torques. VAGCOM + KII-USB. >> My build thread...

  36. #35
    Broken Byzan's Avatar
    Photographic Moderator

    Status
    Offline
    Join Date
    Apr 2004
    Location
    Cardiff, United Kingdom
    Posts
    12,522

    My Social Networking

    Follow Broken Byzan On Twitter Add Broken Byzan on Facebook Add Broken Byzan on Google+ Visit Broken Byzan's Youtube Channel
    ooooooooooooooooooooooooooo interesting

  37. #36
    RIP S3dave

    Status
    Offline
    Join Date
    May 2004
    Location
    nr Glos
    Posts
    7,181
    Quote Originally Posted by s3dave View Post
    just fitted another... whoop whoop 27psi all the way baby and got the car drifting on boost...
    need to watch intake temps now as i have no fmic yet
    I will be waiting for the post where it has blown up
    should'nt be long


    you have just wound it up daft high
    any logging done to see how things are running on timing pull, fueling, egt's etc is a recipe for a serious engine failure

    seriously unwise leaving it at this level Mr
    **http://www.facebook.com/Badger5Ltd**

    NEW NEW NEW eShop now LIVE>
    www.badger5.biz

    Badger 5 Ltd, Queen Annes Gate, Oldends Lane, Stonehouse, Glos, GL10 2DG


    http://www.badger5.co.uk, Tel:01453822880
    bill@badger5.co.uk
    **NEW** Badger5 Section CLICK here>> http://www.audi-sport.net/vb/213-badger-5/

  38. #37
    Westy's Avatar
    Double Dark Side! Diesel & 8P

    Status
    Offline
    Join Date
    Dec 2008
    Location
    Cambridgeshire sometimes Hertfordshire
    Posts
    17,280
    Sweet baby jesus! 27psi
    8P A3 TDI - 220bhp - 335lbft
    A3 Maintenance Thread
    Bye bye S3 you will be missed.
    S3 Build Thread







  39. #38
    s3dave's Avatar
    TFSI Hybrid

    Status
    Offline
    Join Date
    Nov 2009
    Location
    west yorks
    Posts
    10,121
    Quote Originally Posted by badger5 View Post
    I will be waiting for the post where it has blown up
    should'nt be long


    you have just wound it up daft high
    any logging done to see how things are running on timing pull, fueling, egt's etc is a recipe for a serious engine failure

    seriously unwise leaving it at this level Mr
    not really mate apart from the fmic, all internal work has been done, and a hybrid turbo, need to get the fmic done asap then custom map then im off

  40. #39
    <tuffty/>'s Avatar
    Badger 5 Edition

    Status
    Offline
    Join Date
    Sep 2008
    Location
    Gloucestershire
    Posts
    15,591
    Quote Originally Posted by s3dave View Post
    not really mate apart from the fmic, all internal work has been done, and a hybrid turbo, need to get the fmic done asap then custom map then im off
    You have rods then I assume... still need to keep an eye on the AFR and EGT's though bud... 27psi is more boost than I run on my GT30!!! lol

    <tuffty/>
    Silver 2001 AMK S3. Silver alcantara interior... now with added powarrrrrrrr, torques. VAGCOM + KII-USB. >> My build thread...

  41. #40
    <tuffty/>'s Avatar
    Badger 5 Edition

    Status
    Offline
    Join Date
    Sep 2008
    Location
    Gloucestershire
    Posts
    15,591
    ....and should be pointed out that 27psi is prob a tad too high for a little turbo like the K04 hybrid or otherwise... I think thats how S3 Paul ended up lunching his engine....

    <tuffty/>
    Silver 2001 AMK S3. Silver alcantara interior... now with added powarrrrrrrr, torques. VAGCOM + KII-USB. >> My build thread...

 

 
Page 1 of 2 12 LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Single Sign On provided by vBSSO

Garage Plus, Vendor Tools vBulletin Plugins by Drive Thru Online, Inc.

Content Relevant URLs by vBSEO