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50/50 haldex mod

beachbuggy Jun 26, 2013

  1. rupe

    rupe A3 TQS In Devon

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    Ok tbh I haven't checked the plug on the rear diff for signs of oil since changing the pump, but just didn't think it would be able to get through the pump plug on the controller and then through that to the rear. I found that thread when trying to diagnose my fault originally, it's a good thread :thumbsup:
     
  2. jojo

    jojo Looking for Boost! Staff Member Moderator Team Daytona quattro Audi S3 Audi A6 Audi Avant Owner Group

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    A guy on the ASN track sessions today had a fully locked Haldex, he said it wheelhops when he corners at low speed, but it doesn't bother him, as it was what he was after!
     
  3. S3 Paul

    S3 Paul Well-Known Member Regional Rep

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    Oh i wish i didnt read threads like this !
    IF you have a problem with the haldex system... What are the symptoms?
    Does it show on VAG COM?
    I have the Blue controller fitted to the car, A stock working one in a box at home and one fitted to a full rear subframe/ diff i bought from a TT that ive decided it "dodgy" just because i dont know its history
     
  4. Andrew@A.L.D

    Andrew@A.L.D May add NOS to 600+bhp S3.

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    Take you car onto some grass and see if the rear wheels spin

    and it should show up on vag com
     
  5. S3 Paul

    S3 Paul Well-Known Member Regional Rep

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    Oh it will drift ok
    Tried that a few times.
    No vag com faults other than brake position switch bloody things gone again
     
  6. Andrew@A.L.D

    Andrew@A.L.D May add NOS to 600+bhp S3.

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    That don't help the haldex so fix that first and see how it feels
     
  7. Andrew@A.L.D

    Andrew@A.L.D May add NOS to 600+bhp S3.

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  8. daz-20vt

    daz-20vt Well-Known Member

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    Great news. Fair play to whoever sent it!! Really looking forward to this!
     
  9. Andrew@A.L.D

    Andrew@A.L.D May add NOS to 600+bhp S3.

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  10. rhys1210

    rhys1210 Member Team Dolphin Grey VCDS Map User quattro Audi S3

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    that would be me, i have the race controller which is engaged all the time and is still engaged under braking.
     
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  11. Gops

    Gops Badger 5 Edition VCDS Map User Gold Supporter Audi S3

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    Should receive it shortly! :) good thing I kept that! One thing I Want to do is open up the whole haldex! Mine isn't draining oil so ill swap it and dissect the old one!
     
  12. Westy

    Westy Well-Known Member

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    How long have you been running this and how much better is it over standard?
     
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  13. rhys1210

    rhys1210 Member Team Dolphin Grey VCDS Map User quattro Audi S3

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    Since February, unlike the standard and blue upgrade (I did have the normal blue upgrade too) controllers you don't feel the rears kicking in and out, you just feel it push you round the corner as the rears are always engaged. I never liked the feeling of it engaging as it always felt it was later than i wanted it to kick the rears in.

    You can buy this controller from the TT shop if you phone them up, the one on their website is the competition upgrade, i have the race upgrade, both are made by BorgWarner (who own haldex).

    Basically what i have is the hpa competition controller, at the bottom of this page explains it. HPA Motorsports Inc. - Big Brake Kits

    In the UK the 2 upgrades they sell are competition (not toe be confused with hpa competition) and the race (same as hpa competition), these are both the same price.
     
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  14. Andrew@A.L.D

    Andrew@A.L.D May add NOS to 600+bhp S3.

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  15. s3dave

    s3dave TFSI Hybrid Supporter

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  16. Andrew@A.L.D

    Andrew@A.L.D May add NOS to 600+bhp S3.

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    Does anyone have a haldex there not using that has this insert in it

    [​IMG]

    There are two types, I have the other one but not this one
     
  17. daz-20vt

    daz-20vt Well-Known Member

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    Is there an easier way to tell without stripping it down Andrew?
     
  18. Andrew@A.L.D

    Andrew@A.L.D May add NOS to 600+bhp S3.

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    You can get under the car with a mirror and light and have a look on top of the Haldex controller
     
  19. superkarl

    superkarl MAN OF STEEL

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    Mine are the circlip type. Must be the difference in facelift to pre fl.
    There are also esp and non esp controllers, wonder if thats the physical difference
     
  20. Andrew@A.L.D

    Andrew@A.L.D May add NOS to 600+bhp S3.

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    I think the screw types are all preface lift

    My old one was preface lift and was sold to someone with a facelift esp and was told my controller fixed his problem?
     
  21. jojo

    jojo Looking for Boost! Staff Member Moderator Team Daytona quattro Audi S3 Audi A6 Audi Avant Owner Group

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    The difference from holding both units side by side is ones uses a metal gasket(per facelift) and one has a rubber seal, between the controller and actual Haldex.
     
  22. Jason.s

    Jason.s Active Member

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    The controller 02D900554C (which is listed under pre and post facelift) superceeded over to 02D900554D anyway so now there is only one. No options on ESP or not too.

    The change over on the MK4 Golf from C to D was in 2003.
     
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  23. Andrew@A.L.D

    Andrew@A.L.D May add NOS to 600+bhp S3.

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    Anyway back to the topic I was asking

    Can anyone lend me the part in the pic above?
     
  24. Andrew@A.L.D

    Andrew@A.L.D May add NOS to 600+bhp S3.

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    Right guys to start with i'm going to make copies of the of the YHW insert and as soon as one is made i will give it to Gops

    The YHW one give 50/50 right out of the box so i can make ones like that or one that increases torque to the rear but not the full 50/50

    I'm also looking into electronics of the haldex and modifying the hydraulics with electronics to control the flow of the hydraulics to the diff

    Complicated but i do have a few ideas in my head and designing them also
     
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  25. Gops

    Gops Badger 5 Edition VCDS Map User Gold Supporter Audi S3

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    The one joe gave me afterwards was pretty different.. Ill post a pic
     
  26. Gops

    Gops Badger 5 Edition VCDS Map User Gold Supporter Audi S3

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    The one on the right is the one I sent to Andrew.. The one on the left is the one I put in the car..
     

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  27. Dani_B19

    Dani_B19 Audi-sports own special child.

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    So your car has had pre and post controller's fitted in its life gops?
     
  28. jojo

    jojo Looking for Boost! Staff Member Moderator Team Daytona quattro Audi S3 Audi A6 Audi Avant Owner Group

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    And a performance one which lives in a bag in my dining room atm! :laugh:
     
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  29. Dani_B19

    Dani_B19 Audi-sports own special child.

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    And whys it in a bag and not on your car sir?
     
  30. jojo

    jojo Looking for Boost! Staff Member Moderator Team Daytona quattro Audi S3 Audi A6 Audi Avant Owner Group

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    It's going on very soon, as my current one is broke.
     
  31. voorhees

    voorhees Moderator Staff Member Moderator Black Edition Team Brill Red

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    He keeps lots of parts for his car..not on his car
     
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  32. chaz20vt

    chaz20vt Member

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    When will this be ready for sale?
     
  33. Andrew@A.L.D

    Andrew@A.L.D May add NOS to 600+bhp S3.

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    The inserts will be soon but it will only be the ones with the cir clip ones first and not the screw in one as i've yet to get hold of one to measure up.

    If i can get numbers i will do group buy on here maybe?
     
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  34. Westy

    Westy Well-Known Member

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    Be nice to see some test results from a few cars before everyone goes wading in. I assume Gops will be able to comment shortly once he gets his controller back and onto his car?
     
  35. jojo

    jojo Looking for Boost! Staff Member Moderator Team Daytona quattro Audi S3 Audi A6 Audi Avant Owner Group

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    This needs to be switchable between fixed 50/50 and standard, and it will sell loads!
     
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  36. Andrew@A.L.D

    Andrew@A.L.D May add NOS to 600+bhp S3.

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    Thats something i'm working on but its not as simple as you think
     
  37. Andrew@A.L.D

    Andrew@A.L.D May add NOS to 600+bhp S3.

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    Now i may have found a way and i'm buzzing now
     
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  38. Dani_B19

    Dani_B19 Audi-sports own special child.

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    So the circlips for facelifts?
     
  39. Andrew@A.L.D

    Andrew@A.L.D May add NOS to 600+bhp S3.

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    No mate. You will need the threaded one
     
  40. chaz20vt

    chaz20vt Member

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    So mines a 1999 s3 so pre facelift so it that cir clip ones
     

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