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50/50 haldex mod

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

  1. Scullies
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    Scullies Well-Known Member

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    [Oct 21, 2013]
    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. jojo
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    jojo S3 Drift King! Staff Member Moderator

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    [Oct 21, 2013]
    Non working Haldex, pretty sure it's a wiring fault at the connector.
  3. rupe
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    rupe A3 TQS

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    [Oct 21, 2013]
    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 :)
  4. Andrew@A.L.D
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    Andrew@A.L.D Cylinder Head Master

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    [Oct 21, 2013]
    ​Yes read that​
  5. Gops
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    Gops 6th gear @7000rpm

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    [Oct 22, 2013]
    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!
  6. Andrew@A.L.D
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    Andrew@A.L.D Cylinder Head Master

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    [Oct 22, 2013]
    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
  7. Gops
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    Gops 6th gear @7000rpm

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    [Oct 22, 2013]
    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!
  8. S3 Paul
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    S3 Paul Well-Known Member Regional Rep

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    [Oct 22, 2013]
    You mean you can spin the wheels? fronts obviously
  9. jojo
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    jojo S3 Drift King! Staff Member Moderator

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    [Oct 22, 2013]
    Yes, in 3rd and 4th gear along the main straight at CastleCoombe! No fun at all!! :racer:
    Vex182 likes this.
  10. Andrew@A.L.D
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    Andrew@A.L.D Cylinder Head Master

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    [Oct 22, 2013]
    A haldex oil cooler will also be needed for this modification if the car is used everyday
    Scullies likes this.
  11. superkarl
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    superkarl MAN OF STEEL

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    [Oct 22, 2013]
    source a dif oil cooler from another car you reckon?
    or a small mocal core?
  12. s3dave
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    s3dave TFSI Hybrid

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    [Oct 22, 2013]
    So a pump will be needed Andrew?
  13. Andrew@A.L.D
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    Andrew@A.L.D Cylinder Head Master

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    [Oct 22, 2013]
    No pump needed just increase the oil capacity
  14. Andrew@A.L.D
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    Andrew@A.L.D Cylinder Head Master

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    [Oct 22, 2013]
    I know the 0-400 3.2 Turbo s3 runs a Haldex and diff cooler
  15. phil miller
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    phil miller Member

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    [Oct 22, 2013]
    increase the oil cap by how much?
  16. Andrew@A.L.D
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    Andrew@A.L.D Cylinder Head Master

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    [Oct 22, 2013]
    I know I can do it by more than twice the amount it has now
    phil miller likes this.
  17. phil miller
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    phil miller Member

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    [Oct 22, 2013]
    Andrew, when its ready i will take one from you sir :)
  18. Andrew@A.L.D
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    Andrew@A.L.D Cylinder Head Master

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    [Oct 23, 2013]
    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?
  19. daz-20vt
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    daz-20vt Well-Known Member

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    [Oct 23, 2013]
    Its not something that needs constant adjusting is it so guess so. As long as the elements dont kill it. That fair?
  20. Andrew@A.L.D
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    Andrew@A.L.D Cylinder Head Master

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    [Oct 23, 2013]
    No

    just set it for track days or 1/4 mile the put it back to standard
  21. daz-20vt
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    daz-20vt Well-Known Member

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    [Oct 23, 2013]
    Thats what i meant. Standard being what torque split ratio the insert is set at right? Or back to oem standard?
  22. Gops
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    Gops 6th gear @7000rpm

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    [Oct 23, 2013]
    I think that's fine. If you was going on a track or drag strip, I'd be happy to get underneath and adjust!
  23. Andrew@A.L.D
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    Andrew@A.L.D Cylinder Head Master

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    [Oct 23, 2013]
    Doing it with a switch is and will be harder and not cheap
  24. superkarl
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    superkarl MAN OF STEEL

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    [Oct 23, 2013]
    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.
  25. ScottD3
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    ScottD3 I want your faulty electronics

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    [Oct 23, 2013]
    That's my thinking.
    Why can't the eeprom from a Blue controller copied to another?
  26. Andrew@A.L.D
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    Andrew@A.L.D Cylinder Head Master

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    [Oct 23, 2013]
    I would love to have the standalone haldex that's used in some of the over seas s3
  27. Sam_
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    Sam_ Down under

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    [Oct 23, 2013]
  28. Andrew@A.L.D
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    Andrew@A.L.D Cylinder Head Master

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    [Oct 23, 2013]
    There are cheaper ones out there

    thats well over priced
  29. Sam_
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    Sam_ Down under

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    [Oct 23, 2013]
    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.
  30. Andrew@A.L.D
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    Andrew@A.L.D Cylinder Head Master

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    [Oct 23, 2013]
    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
  31. jojo
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    jojo S3 Drift King! Staff Member Moderator

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    [Oct 23, 2013]
    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!
  32. superkarl
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    superkarl MAN OF STEEL

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    [Oct 23, 2013]
    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.
  33. badger5
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    badger5 www.badger5.co.uk Site Sponsor

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    [Oct 23, 2013]
    without a centre diff, wont your rear wheels hop
  34. rhys1210
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    rhys1210 Member

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    [Oct 23, 2013]
    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.
  35. Scullies
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    Scullies Well-Known Member

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    [Oct 23, 2013]
    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.
  36. Andrew@A.L.D
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    Andrew@A.L.D Cylinder Head Master

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    [Oct 23, 2013]
    It will
  37. Andrew@A.L.D
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    Andrew@A.L.D Cylinder Head Master

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    [Oct 23, 2013]
    Audi S4 set up?
  38. Scullies
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    Scullies Well-Known Member

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    [Oct 23, 2013]
  39. RobinJI
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    RobinJI Member

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    [Oct 23, 2013]
    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.
  40. Andrew@A.L.D
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    Andrew@A.L.D Cylinder Head Master

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    [Oct 23, 2013]
    How about using a Evo set up them inc gearbox

    Anything can be made to fit

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