1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

50/50 haldex mod

Discussion in 'A3/S3 Forum (8L Chassis)' started by beachbuggy, Jun 26, 2013.

  1. Scullies

    Scullies Well-Known Member

    Joined:
    Feb 9, 2012
    Messages:
    1,394
    Likes Received:
    410
    That sqs with solenoid option could work with a micro switch on the throttle pedal so it activates at a certain throttle position, like WOT engages the solenoid and you get the preset power split, then part throttle the solenoid is off and you have fwd until you WOT again.

    Their website is in chinglish so I won't really trust what they deem is safe :)
     
  2. Google AdSense Guest Advertisement



    to hide this advert.
  3. jojo

    jojo Looking for Boost!
    Staff Member Moderator quattro Audi S3

    Joined:
    Sep 4, 2003
    Messages:
    27,318
    Likes Received:
    2,425
    Non working Haldex, pretty sure it's a wiring fault at the connector.
     
  4. rupe

    rupe A3 TQS In Devon

    Joined:
    Jul 14, 2013
    Messages:
    254
    Likes Received:
    34
    You have probably already found and read it, but some interesting info in this thread on vortex on the haldex although you need to sift through it a bit!

    VWVortex.com - i have a franken-haldex idea

    just putting it in here, as something in their might help this project somewhere along the way :)
     
  5. Andrew@A.L.D

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

    Joined:
    Jun 19, 2009
    Messages:
    3,705
    Likes Received:
    468
  6. Gops

    Gops 6th gear @7000rpm

    Joined:
    Nov 6, 2009
    Messages:
    2,762
    Likes Received:
    338
    Well see how this performs. My haldex is duff so I don't mind testing it to destruction. Once I gets a new haldex, ill be splitting mine open to see how and what i can do to keep it cool and modify it!
     
  7. Andrew@A.L.D

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

    Joined:
    Jun 19, 2009
    Messages:
    3,705
    Likes Received:
    468
    you need a working haldex gops as when you fit my device it will 70/30 all the time and not 50/50 when the haldex is meant to kick in.

    I'll sill send you one to test so you can feel the 70/30 torque split
     
  8. Gops

    Gops 6th gear @7000rpm

    Joined:
    Nov 6, 2009
    Messages:
    2,762
    Likes Received:
    338
    Oh it works, just I know it's not draining any oil for some reason. I was just saying I don't mind if something happens whilst testing it lol!
     
  9. S3 Paul

    S3 Paul Well-Known Member
    Regional Rep

    Joined:
    Oct 27, 2006
    Messages:
    2,814
    Likes Received:
    90
    You mean you can spin the wheels? fronts obviously
     
  10. jojo

    jojo Looking for Boost!
    Staff Member Moderator quattro Audi S3

    Joined:
    Sep 4, 2003
    Messages:
    27,318
    Likes Received:
    2,425
    Yes, in 3rd and 4th gear along the main straight at CastleCoombe! No fun at all!! :racer:
     
    Vex182 likes this.
  11. Andrew@A.L.D

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

    Joined:
    Jun 19, 2009
    Messages:
    3,705
    Likes Received:
    468
    A haldex oil cooler will also be needed for this modification if the car is used everyday
     
    Scullies likes this.
  12. superkarl

    superkarl MAN OF STEEL

    Joined:
    Mar 28, 2010
    Messages:
    8,375
    Likes Received:
    1,579
    source a dif oil cooler from another car you reckon?
    or a small mocal core?
     
  13. s3dave

    s3dave TFSI Hybrid
    Supporter

    Joined:
    Nov 11, 2009
    Messages:
    10,120
    Likes Received:
    732
    So a pump will be needed Andrew?
     
  14. Andrew@A.L.D

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

    Joined:
    Jun 19, 2009
    Messages:
    3,705
    Likes Received:
    468
  15. Andrew@A.L.D

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

    Joined:
    Jun 19, 2009
    Messages:
    3,705
    Likes Received:
    468
    I know the 0-400 3.2 Turbo s3 runs a Haldex and diff cooler
     
  16. phil miller

    phil miller Active Member

    Joined:
    Sep 9, 2012
    Messages:
    956
    Likes Received:
    110
    increase the oil cap by how much?
     
  17. Andrew@A.L.D

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

    Joined:
    Jun 19, 2009
    Messages:
    3,705
    Likes Received:
    468
    I know I can do it by more than twice the amount it has now
     
    phil miller likes this.
  18. phil miller

    phil miller Active Member

    Joined:
    Sep 9, 2012
    Messages:
    956
    Likes Received:
    110
    Andrew, when its ready i will take one from you sir :)
     
  19. Andrew@A.L.D

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

    Joined:
    Jun 19, 2009
    Messages:
    3,705
    Likes Received:
    468
    Would people be happy with a under car adjuster like the sqs one but still have the haldex in place ? As that's another option?
     
  20. daz-20vt

    daz-20vt Well-Known Member

    Joined:
    Feb 6, 2012
    Messages:
    2,327
    Likes Received:
    381
    Its not something that needs constant adjusting is it so guess so. As long as the elements dont kill it. That fair?
     
  21. Andrew@A.L.D

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

    Joined:
    Jun 19, 2009
    Messages:
    3,705
    Likes Received:
    468
    No

    just set it for track days or 1/4 mile the put it back to standard
     
  22. Google AdSense Guest Advertisement



    to hide this advert.
  23. daz-20vt

    daz-20vt Well-Known Member

    Joined:
    Feb 6, 2012
    Messages:
    2,327
    Likes Received:
    381
    Thats what i meant. Standard being what torque split ratio the insert is set at right? Or back to oem standard?
     
  24. Gops

    Gops 6th gear @7000rpm

    Joined:
    Nov 6, 2009
    Messages:
    2,762
    Likes Received:
    338
    I think that's fine. If you was going on a track or drag strip, I'd be happy to get underneath and adjust!
     
  25. Andrew@A.L.D

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

    Joined:
    Jun 19, 2009
    Messages:
    3,705
    Likes Received:
    468
    Doing it with a switch is and will be harder and not cheap
     
  26. superkarl

    superkarl MAN OF STEEL

    Joined:
    Mar 28, 2010
    Messages:
    8,375
    Likes Received:
    1,579
    i cant believe with all the computer/software geeks in the world, these things havent been hacked or reprogrammed.

    50/50 at all times, then depending on the steering angle sensor readings it will progtressively allow slip in corners. then when steering angle goes back to 0 it re engages.
    Effectively that would be the reverse of haldex now.

    the ONLY time haldex is **** is when its slow and indecisive with hard cornering and fast driving.
    With it working off so many sensors, say it starts to send to the rear at X steering angle, and X wheel speed difference, why cant those values just be lowered.
    Im pretty computer illiterate but, it cant be that hard surely. A 0 here, a 1 there, its all binary BS
     
    chris99, kwistof and Westy like this.
  27. ScottD3

    ScottD3 I want your faulty electronics
    Supporter

    Joined:
    Nov 24, 2010
    Messages:
    15,274
    Likes Received:
    1,083
    That's my thinking.
    Why can't the eeprom from a Blue controller copied to another?
     
  28. Andrew@A.L.D

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

    Joined:
    Jun 19, 2009
    Messages:
    3,705
    Likes Received:
    468
    I would love to have the standalone haldex that's used in some of the over seas s3
     
  29. Sam_

    Sam_ Down under

    Joined:
    Mar 8, 2011
    Messages:
    2,932
    Likes Received:
    413
  30. Andrew@A.L.D

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

    Joined:
    Jun 19, 2009
    Messages:
    3,705
    Likes Received:
    468
    There are cheaper ones out there

    thats well over priced
     
  31. Sam_

    Sam_ Down under

    Joined:
    Mar 8, 2011
    Messages:
    2,932
    Likes Received:
    413
    I don't think he *wants* $1800. I bet he'd take way less than half by the sounds of it. Which wouldn't be bad compared to what Blue ones seem to be going for at the moment.
     
  32. Andrew@A.L.D

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

    Joined:
    Jun 19, 2009
    Messages:
    3,705
    Likes Received:
    468
    I have a blue one myself. I'm planning to run one of my mods to the haldex when done for 1/4 mike drags and the odd track day
     
  33. jojo

    jojo Looking for Boost!
    Staff Member Moderator quattro Audi S3

    Joined:
    Sep 4, 2003
    Messages:
    27,318
    Likes Received:
    2,425
    As good as you make it all sound Karl, I want my haldex to be locked 50/50 in the turns. The difference between having haldex and no haldex on my car is night and day. I had to adjust my driving line to compensate for the lack of traction I had at CastleCoombe a few weeks back!
     
  34. superkarl

    superkarl MAN OF STEEL

    Joined:
    Mar 28, 2010
    Messages:
    8,375
    Likes Received:
    1,579
    i didnt mean no haldex during corners, i just meant beyond a certain steering angle it should allow for different wheel speeds and slip what it needs.
     
  35. badger5

    badger5 www.badger5.co.uk
    Site Sponsor

    Joined:
    May 28, 2004
    Messages:
    8,119
    Likes Received:
    1,086
    without a centre diff, wont your rear wheels hop
     
  36. rhys1210

    rhys1210 Member

    Joined:
    Oct 24, 2011
    Messages:
    156
    Likes Received:
    19
    The rears only hope if you moving slowly. Like parking.

    I've never had mine hope under normal driving and cornering, only slow manoeuvres.

    My haldex is locked 50:50 all the time even under braking.
     
  37. Scullies

    Scullies Well-Known Member

    Joined:
    Feb 9, 2012
    Messages:
    1,394
    Likes Received:
    410
    Someone needs to look into removing the haldex box from the diff, fit a torsion diff and correct gear to the diff shaft and rock out with old skool quattro :eyebrows:


    Well its on my "ONE DAY" list
     
    chris99, Westy and Jason.s like this.
  38. Andrew@A.L.D

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

    Joined:
    Jun 19, 2009
    Messages:
    3,705
    Likes Received:
    468
    It will
     
  39. Andrew@A.L.D

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

    Joined:
    Jun 19, 2009
    Messages:
    3,705
    Likes Received:
    468
    Audi S4 set up?
     
  40. Scullies

    Scullies Well-Known Member

    Joined:
    Feb 9, 2012
    Messages:
    1,394
    Likes Received:
    410
  41. RobinJI

    RobinJI Member

    Joined:
    Jul 14, 2012
    Messages:
    168
    Likes Received:
    20
    Sadly you can't fit a conventional differential (torsen or not) out back, as they work with 1 input and 2 outputs. Torque is introduced at one end of the diff (the casing usually), and then split between 2 outputs (the front and rear diffs) using whatever method. Out the back of an S3 there's only 1 input (the driveshaft), and 1 output (the rear diff), so there's no way of dividing the torque between the 2 differentials. It can be connected, not connected, or anywhere inbetween, but whatever you do with that connection, you can't have any bearing on what happens up front. Sadly the only way to achieve permanent 4wd with a functioning center diff is to include the center diff up front in the box like the true Quattro systems do on the longitudinal arrangements.
     
  42. Andrew@A.L.D

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

    Joined:
    Jun 19, 2009
    Messages:
    3,705
    Likes Received:
    468
    How about using a Evo set up them inc gearbox

    Anything can be made to fit
     

Share This Page