50/50 haldex mod

Roadtrain said:
I always think about the best mod for ours S3 8L should be a REAL 4x4: does this 50/50% mod can brake tranismission? Or is it "safe"? Thank you :)
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Long term it would lead to premature wear of the haldex clutch plates

<tuffty/>
 
Stuart B said:
someone on here recently installed the valve and commented he believes it has contributed to understeer. I cant find his thread.
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I believe that would be me. I soldiered on through and solved my understeer problem by setting up camber. -2.25 degrees in the front, -0.5 in the rear. Corners like it is on rails, and literally does not understeer anywhere, ever. WOT mid way through a corner and it will end up in a 4 wheel drift with the front of the car pointing where you want it to go, not the opposite.

Was miserable the first few weeks, though.
 
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Thanks for posting - I didn't want to refer to you as the Arnie avatar guy :)
 
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Stuart B said:
someone on here recently installed the valve and commented he believes it has contributed to understeer. I cant find his thread.
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If you'll find it write me about please, thank you :)
 
Shoomakan said:
I believe that would be me. I soldiered on through and solved my understeer problem by setting up camber. -2.25 degrees in the front, -0.5 in the rear. Corners like it is on rails, and literally does not understeer anywhere, ever. WOT mid way through a corner and it will end up in a 4 wheel drift with the front of the car pointing where you want it to go, not the opposite.

Was miserable the first few weeks, though.
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Any video with S3 8L drift after Haldex 50/50 mod? Thank you :)
 
Roadtrain said:
Any video with S3 8L drift after Haldex 50/50 mod? Thank you :)
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Nope. Besides, installing the plug doesn't magically make it drift, just keeps it engaged. I doubt with less than 400hp on good tires an S3 will "drift", so I don't even bother trying. It's nice for other reasons, like predictability, snow/water driving, and cornering IMO (if you've sorted out your camber).
 
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Shoomakan said:
Nope. Besides, installing the plug doesn't magically make it drift, just keeps it engaged. I doubt with less than 400hp on good tires an S3 will "drift", so I don't even bother trying. It's nice for other reasons, like predictability, snow/water driving, and cornering IMO (if you've sorted out your camber).
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OK, thank you. So there is no way convert it as a real 4x4? In addition, this CPU mod can undermine integrity of transimission using it in 50/50 costantly? Thamk you.
 
Roadtrain said:
OK, thank you. So there is no way convert it as a real 4x4? In addition, this CPU mod can undermine integrity of transimission using it in 50/50 costantly? Thamk you.
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S3 uses a haldex for it AWD... this is a wet clutch system that means the car is FWD under normal conditions... this 'mod' is not a CPU mod either its a mechanical plug to causes the valving of the haldex hydraulics to be more engaged than normal and so when the haldex is told to react it reacts from a more preloaded state which appears to make it more reactive and accentuates the lock...

As the haldex system requires no centre diff to stop the rear axle from winding up (centre diff works in the same way for front to rear axles as the diff in the gearbox does for left to right driveshafts) you cannot permanently lock the haldex into 50/50 without causing damage

If you wanted to 'convert' then you would have to look at either fully converting to a torsion quattro system or use something from another manufacturer... this would require lots of fabrication and possibly converting the car from transverse to longitudal engine configuration... you won't actually gain much in reality unless you intend to rally the car on loose stages...

Not sure what you are expecting from this tbh... this 50/50 plug is just a cheap way to fool the haldex to operate more quickly... the side effect is increased wear on the system...

Without going back though the posts I am sure I have written this somewhere before but... haldex is haldex... it will arguably never be like a torsion based AWD system... S3's gen 1 haldex controller/software is not the most effective out there but controllers such as the HPA and a few others that are now emerging since the genuine sport blue haldex controller stopped being produced will give you the best results from the system..

I run a HPA controller on my S3 and have no issues at all with its ability to control the haldex with the power I have...

Also bare in mind that haldex AWD is used on a lot of high end sports cars these days... bugatti veyron being one of them

<tuffty/>
 
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Thank you a lot :) What I would mean was if is possible transfom S3 8L in a real 4x4 as Impreza STi, Lancer Evo, etc., because Torsen works on longitudinal engines only, instead Haldex that work on transverse ones, but this can't work as a "real 4x4" (sorry my english). Just someone swapped different car transimission? If yes, what one? Thank you again :)
 
I absolutely agree it causes wear, but I've put 20,000km on it so far and I haven't noticed any ill effects. Yet. :p

I do baby it more than most (I turn off the haldex pump via relay attached to handbrake light), and I always remember to switch off before u-turns or when parking anywhere and I know I'll be steering alot. I'm sure this plays a positive part in the damage the plug will eventually cause.

And to be completely honest... I'm waiting till my Haldex blows ($150 repair over here) and then just installing a proper controller. The plug should never be thought of as a permanent fix, in my opinion.

You mentioned HPA as a new source for controllers as well as "others". Can you share some links? :)
 
Roadtrain said:
Thank you a lot :) What I would mean was if is possible transfom S3 8L in a real 4x4 as Impreza STi, Lancer Evo, etc., because Torsen works on longitudinal engines only, instead Haldex that work on transverse ones, but this can't work as a "real 4x4" (sorry my english). Just someone swapped different car transimission? If yes, what one? Thank you again :)
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Give it up dude... embrace haldex or buy a car with permenant AWD

<tuffty/>
 
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Shoomakan said:
I absolutely agree it causes wear, but I've put 20,000km on it so far and I haven't noticed any ill effects. Yet. :p

I do baby it more than most (I turn off the haldex pump via relay attached to handbrake light), and I always remember to switch off before u-turns or when parking anywhere and I know I'll be steering alot. I'm sure this plays a positive part in the damage the plug will eventually cause.

And to be completely honest... I'm waiting till my Haldex blows ($150 repair over here) and then just installing a proper controller. The plug should never be thought of as a permanent fix, in my opinion.

You mentioned HPA as a new source for controllers as well as "others". Can you share some links? :)
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Using the search (rather than my memory as thats shot to pieces)...
http://www.audi-sport.net/xf/threads/hpa-gen1-haldex-controller.224692

<tuffty/>
 
It must work then - were the Audi Quattro's in the 80's the same basic design too?
 
Roadtrain said:
This is the dream :D

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This can be done with a haldex... in this case its power that is providing the experience... an R32 engine transplant with a turbo in this case... permanent AWD makes no difference... power is what you need to do this...

Roadtrain said:
Bonus:

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This is a video game

<tuffty/>
 
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Shoomakan said:
I absolutely agree it causes wear, but I've put 20,000km on it so far and I haven't noticed any ill effects. Yet. :p

I do baby it more than most (I turn off the haldex pump via relay attached to handbrake light), and I always remember to switch off before u-turns or when parking anywhere and I know I'll be steering alot. I'm sure this plays a positive part in the damage the plug will eventually cause.
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So this is the way save Haldex working 50/50? And can you post a picture of relay attached to handbrake light? Thank you :)

And to be completely honest... I'm waiting till my Haldex blows ($150 repair over here) and then just installing a proper controller. The plug should never be thought of as a permanent fix, in my opinion.
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What proper controller do you refer exatly? Thank you :)

<tuffty/> said:
Give it up dude... embrace haldex or buy a car with permenant AWD

<tuffty/>
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It's a sad day :(

Stuart B said:
A Volvo?
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Subaru STi or Mitsubishi Evo. But I love too much VAG group! :)

<tuffty/> said:
This can be done with a haldex... in this case its power that is providing the experience... an R32 engine transplant with a turbo in this case... permanent AWD makes no difference... power is what you need to do this...
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So how much power we need exatly? 300 PS on 1.8 T should be enough?

This is a video game
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I know Bro, that the sense of word "Bonus" ;)
 
Roadtrain said:
So this
So how much power we need exatly? 300 PS on 1.8 T should be enough?
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No idea... never tried it... and I have more power than that and mine grips like a limpet


Roadtrain said:
I know Bro, that the sense of word "Bonus" ;)
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Clearly google translate has let you down... and please don't call me 'bro'... thanks

<tuffty/>
 
Shoomakan said:
I absolutely agree it causes wear, but I've put 20,000km on it so far and I haven't noticed any ill effects. Yet. :p

I do baby it more than most (I turn off the haldex pump via relay attached to handbrake light), and I always remember to switch off before u-turns or when parking anywhere and I know I'll be steering alot. I'm sure this plays a positive part in the damage the plug will eventually cause.
Click to expand...

The plugs acts mechanically to artificially build pressure... the hydraulics in the haldex are mechanical with the pumping force being generated by an annular piston system... disconnecting electrically might not prevent pressure build up due to the function of the plug... this is a similar issue faulty haldex controllers present when the valve sticks and the wheels skip under low speed turning...

Here is a pdf of how the haldex works in VAG cars... (link opens a PDF)

http://www.volkspage.net/technik/ssp/ssp/SSP_206.pdf

<tuffty/>
 
<tuffty/> said:
The plugs acts mechanically to artificially build pressure... the hydraulics in the haldex are mechanical with the pumping force being generated by an annular piston system... disconnecting electrically might not prevent pressure build up due to the function of the plug... this is a similar issue faulty haldex controllers present when the valve sticks and the wheels skip under low speed turning...

Here is a pdf of how the haldex works in VAG cars... (link opens a PDF)

http://www.volkspage.net/technik/ssp/ssp/SSP_206.pdf

<tuffty/>
Click to expand...

That was very informative and may change the speed at which I will address this. Thanks.
 
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I've had a few 4 wheel drifts in the damp/wet with 300bhp.
Although not intentional, and it was a squeaky bum moment
 
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S3s drift all over the place if you buy cheap Chinese hard plastic tyres - although probably once into the hedge.

I have to be honest I used to wheel spin, lose the back end, get up on two wheels round corners a lot more when I was a young inexperienced driver, there is something ingrained after 30 odd years of driving and 4 kids that seems to stop that type of "ill behaviour" - obviously a 1.3 escort mark 2 only weighed about 600kg.
 
<tuffty/> said:
This can be done with a haldex... in this case its power that is providing the experience... an R32 engine transplant with a turbo in this case... permanent AWD makes no difference... power is what you need to do this...
Click to expand...
It has peloquin LSD on front and rear axel both, and in addition modded Haldex control.
 
Hi everyone,
I have a 2.8 v6 golf 4motion, and when I turn full left or right, like in the parking, my rear wheels « scratch » the ground, and they « jump » it’s like the Hadley is always in 4x4...when I put thé haldex fuse out the problem stops.
I don’t have any error code in the VAG-COM, and when I diagnose only the Haldex, I can ear the pump switching on..

My ground cable from the haldex is broken I will change it in a few days. I saw someone at the 1st page of the thread saying that he is always in 50/50 4x4 because his ground cable broke.
Can my issue could come from this broken cable ?
 
My 8L S3 Quattro suffers this also. It doesn’t always do it but more often than not. If I pull the fuse then the problem stops as the car becomes 2WD and then the ESP light remains lit. I did put on another Haldex controller (sourced from a breakers yard) which made the car 2WD only but with no ESP light appearing, so I’m going to put the old controller back on. The VW/Audi indie I use say that I need a new diff. I also had a broken Earth strap replaced but it didn’t make a difference.
 
Don’t you still need a working haldex with that doesn’t it plug in between the haldex harness like the hpa
 
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Cheers mates! So I think I will replace the haldex contrôler..and make a bleeding of the haldex oil. Also I saw on a French forum that it is good to clean the carter on the opposite side of the contrôler..the part has a magnet inside which is usually full of filing. I hope it will fix my issue because my car inspection is soon and they will not deliver it to me if the haldex is always 50/50..
last thing does the haldex contrôler is compatible between the différents engines? i mean v6, 1.8l, gas or diesel ?
 
s3mad_dude said:
My 8L S3 Quattro suffers this also. It doesn’t always do it but more often than not. If I pull the fuse then the problem stops as the car becomes 2WD and then the ESP light remains lit. I did put on another Haldex controller (sourced from a breakers yard) which made the car 2WD only but with no ESP light appearing, so I’m going to put the old controller back on. The VW/Audi indie I use say that I need a new diff. I also had a broken Earth strap replaced but it didn’t make a difference.
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I've just changed my Haldex controller and my issue is solved !! i am so happy, its an other car now, when i park or turn, it doesn't make the rear wheels scratch !!! you said your "new" controller is always in 2WD, without ESP light on, but how do you know its never 4WD?

does the car has more acceleration when its 2WD/or fuse out? because i have this feeling
But with my "New" haldex controller (also from breakers) i feel its the same acceleration as with my old Haldex controller, so i assume it's working well? (2Wd while parking or tights turns, and 4WD when accelerate, or loosing traction)
 
I know it’s 2WD because if I accelerate at full power the front wheels spin! Also in 2WD the car feels a bit quicker actually. That’s not normal for wheel spin on a quattro with a working haldex. The parking issue is great now though! So I’m back to the drawing board. Maybe the second hand Haldex controller is also broken. Or maybe my first controller is fine but the pump is intermittent. I need to do some more testing but haven’t had time lately.
 
But i think that when the pump is broken it’s always 2wd...so even with the old haldex contrôler you should be in 2wd.
Have you tried to make the Haldex tests with the VAG-COM? You should hear the pump if it works.
 
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