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50/50 haldex mod

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

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

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    [Oct 20, 2013]
    Sorry bit of a mix up

    facelifts should be a cir clip ( 2000 on )

    pre facelift should be threaded insert ( 1999/2000 ish )

    you will need to get under the car to find out
  2. Dani_B19
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    Dani_B19 Audi-sports own special child.

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    [Oct 20, 2013]
    So ill need the threaded one then.
  3. Andrew@A.L.D
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    Andrew@A.L.D May add NOS to 600+bhp?

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    [Oct 20, 2013]
    yes
  4. phil miller
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    phil miller Member

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    [Oct 20, 2013]
    and i need a cir clip one :)

    Great stuff andrew
  5. jojo
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    jojo S3 Drift King! Staff Member Moderator

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    [Oct 20, 2013]
    I'd like a switchable haldex from inside the dash, on or off. Can't be hard to wire the earth wire into the dash with a rocker switch. Call it the eco switch. :)
    Westy likes this.
  6. Westy
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    Westy Double Dark Side! Diesel & 8P

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    [Oct 20, 2013]
    This does sound like a good idea. Like a "race mode" or "snow mode" :racer:
    m19lte likes this.
  7. daz-20vt
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    daz-20vt Well-Known Member

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    [Oct 20, 2013]
    Would 50:50 be ok with minimul road use? Or would a switchable unit still be better?
  8. phil miller
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    phil miller Member

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    [Oct 20, 2013]

    Im liking the sound of this, maybe use one of the spare switch houses by the ESP switch
  9. Andrew@A.L.D
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    Andrew@A.L.D May add NOS to 600+bhp?

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    [Oct 20, 2013]
    It will be a switch altering the hydraulic pressure to the haldex clutch
  10. Gops
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    Gops 6th gear @7000rpm

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    [Oct 20, 2013]
    Nice! :)
  11. phil miller
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    phil miller Member

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    [Oct 20, 2013]
    Andrew any idea on price's yet?
  12. Andrew@A.L.D
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    Andrew@A.L.D May add NOS to 600+bhp?

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    [Oct 20, 2013]
    No idea yet sorry
  13. Gops
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    Gops 6th gear @7000rpm

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    [Oct 20, 2013]
    Lets see what happens with this one first.. Jo, if you take your old haldex off, can I nick the wire? Saves me snipping my wire off again lol
  14. Andrew@A.L.D
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    Andrew@A.L.D May add NOS to 600+bhp?

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    [Oct 21, 2013]
    I've come up with a new idea that's like the YHW insert and will be much cheaper to make

    will be as cheap as £30 inc p&p the modified versions with a switch will be much more.
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  15. Westy
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    Westy Double Dark Side! Diesel & 8P

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    [Oct 21, 2013]
    Looking forward to some test results. Might even be able to get a decent 4wd dyno graph with 50/50 haldex.
  16. Sam_
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    Sam_ Down under

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    [Oct 21, 2013]
    Nah, not if it's still electronically controlled. I've got the blue (so 50/50) and it still has a hissy fit on the dyno.

    This will be a nice cheaper alternative to the blue/orange controllers. Just hope it doesn't bind up at low speed like the orange or the insert.
  17. Andrew@A.L.D
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    Andrew@A.L.D May add NOS to 600+bhp?

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    [Oct 21, 2013]
    Mines not going to be that fancy
    s3dave likes this.
  18. chaz20vt
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    chaz20vt Member

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    [Oct 21, 2013]
    When will this be ready and tested then Andrew
    Believe i need the threaded type
  19. Westy
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    Westy Double Dark Side! Diesel & 8P

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    [Oct 21, 2013]
    Let's give Andrew a chance! This was only an idea till a few weeks ago and we've not even seen any test results. This could chew up a rear diff in 100 miles for all we know.

    Lets just sit back and wait for updates ;)
  20. Andrew@A.L.D
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    Andrew@A.L.D May add NOS to 600+bhp?

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    [Oct 21, 2013]
    I need the thread type insert to copy from
  21. Andrew@A.L.D
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    Andrew@A.L.D May add NOS to 600+bhp?

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    [Oct 21, 2013]
    50/50 isn't good for are cars for everyday use, race and drag really


    i do plan to make a simple mode that gives 70/30 split to save the diff and to make it better to drive at low speed

    also looking into a simple under car adjuster one
  22. Jason.s
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    Jason.s Active Member

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    [Oct 21, 2013]
    Anything more for everyday use and there will be rear diffs sh!tting themselves all over the country. 60/40 at a push or 70/30 would be the winner i think.
  23. Andrew@A.L.D
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    Andrew@A.L.D May add NOS to 600+bhp?

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    [Oct 21, 2013]
    I can make my own sort of insert as a kit that gives you a option of 50/50, 60/40, 70/30
    Jason.s likes this.
  24. Westy
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    Westy Double Dark Side! Diesel & 8P

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    [Oct 21, 2013]
    Or pull the haldex fuse for FWD A3 mode....
    Sam_ likes this.
  25. Andrew@A.L.D
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    Andrew@A.L.D May add NOS to 600+bhp?

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    [Oct 21, 2013]
    good for burn outs to get heat into the tyres for 1/4 miles
    Westy likes this.
  26. Sam_
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    Sam_ Down under

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    [Oct 21, 2013]
    So it's going to be locked at a ratio and no longer controlled?
  27. Sam_
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    Sam_ Down under

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    [Oct 21, 2013]
    "Slayer" mode
    jojo and Westy like this.
  28. Andrew@A.L.D
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    Andrew@A.L.D May add NOS to 600+bhp?

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    [Oct 21, 2013]
    it will still be controlled but it will run at say 70/30 then you will floor it and the haldex will take over giving you 50/50 then return back to 70/30

    its a simple system hydraulic system with complicated electronics
  29. chaz20vt
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    chaz20vt Member

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    [Oct 21, 2013]
    This sounds good to me
  30. boost-addict
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    boost-addict Active Member

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    [Oct 21, 2013]
    Typically german built!!

    All sounds interesting. Don't suppose a4 have this kind of adjustment?
  31. Jason.s
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    Jason.s Active Member

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    [Oct 21, 2013]
    A4 quattros dont have haldex..They have full time 4wd and a center diff.
  32. TDIQ
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    TDIQ 8L > 8P > 8V

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    [Oct 21, 2013]
    Very very interesting stuff. So the insert will give a 70/30 split and when the haldex would usually engage there'll be a 50/50 split? If so I'm definitely interested in purchasing one when available!!
  33. superkarl
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    superkarl MAN OF STEEL

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    [Oct 21, 2013]
    Be interesting if 60/40 gives enough slip for cornering in the remaining 10%
  34. phil miller
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    phil miller Member

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    [Oct 21, 2013]
    still very very interested in this, and as soon as its ready i will have one for sure
  35. jojo
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    jojo S3 Drift King! Staff Member Moderator

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    [Oct 21, 2013]
    Unfortunately not Gops, I'm 90% sure it's a connector problem on my car(no comms on VCDS), and I want to keep the standard one as spare if the performance one decides to die on me.
  36. daz-20vt
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    daz-20vt Well-Known Member

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    [Oct 21, 2013]
    At the risk of looking thick. Ive never understood how you can split power say 70:30 . How does it work? How are the rears doing anything if the frontw have more power to them. Probably obvious but id love to understand this. Also persumably if you went for a 50:50 insert the haldex would lose any control? Thanks guys, daz
  37. S3 Paul
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    S3 Paul Well-Known Member Regional Rep

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    [Oct 21, 2013]
    Jojo... What issues do you have ?
  38. Scullies
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    Scullies Well-Known Member

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    [Oct 21, 2013]
    Does anyone know what's going to happen to the haldex when its at 70/30 and you doing 140km/h.
    I read the OEM setup turns off after 100km/h.
  39. rhys1210
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    rhys1210 Member

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    [Oct 21, 2013]
    Surely if you have a 70:30 split this is causing the clutch plates in the haldex to continually slip, surely this will cause more wear?
  40. Andrew@A.L.D
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    Andrew@A.L.D May add NOS to 600+bhp?

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    [Oct 21, 2013]
    SQS Racing sell these that get rid of the controller completely and can be fine adjusted from 50/50 down to 100/0

    SQS Racing | Haldex Regulator

    I sure they would mention the problems of having it set on full down to 70/30 etc

    How to people go about the Haldex when fitting them into Mk1/2 Golfs and other car?

    I know you can over heat the Haldex pump if you run them constantly for long periods of time, Keeping the Haldex oil cool is a good start when doing this

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