[s-cars] Installing Torsen diffs and disabling EDL on a 95.5 S6.

Tue Jan 22 21:54:08 PST 2008

>Aside from the better braking under stress, EDL sucks

Was the EDL on the UrS significantly different than the EDL on the B5 S4's?
My '01 S4 EDL works pretty darn good.  I can count on one hand the number of
times I used my differential locks in my 3 200's and my '92 UrS.  The EDL on
the other hand is always there.  I know in theory it can only do 50% of what
the diff-lock can do but having driven both systems in the Denver area I
think both have their merits and downsides.  I just wish there was a factory
button to disable the EDL.  Of course if you are in 12" of powder up to your
bumper split with an H&R coil-over suspension and come to a complete stop
the EDL system can make your brakes a little warm as you make your way out
of the snow.....or so I've heard ;)  Quattros truly are amazing.

--Calvin

-----Original Message-----
From: s-car-list-bounces at audifans.com
[mailto:s-car-list-bounces at audifans.com]On Behalf Of LL - NY
Sent: Monday, January 21, 2008 2:26 PM
To: David Torrey
Cc: s-car-list at audifans.com
Subject: Re: [s-cars] Installing Torsen diffs and disabling EDL on a
95.5 S6.

I don't recall an EDL switch on my 95.5 UrS. If you have a '93 100, it
has a locking rear diff (quattro II) and pressing the rear diff switch will
disable the
3 channel (both rear wheels same channel) ABS. Just like my friend's
100CSQA.

In late 95(.5) Quattro III has no mechanical rear diff lock,  4 channel
ABS, and it utilizes the independent rear channels to approximate
a locking rear diff, hence Electronic Differential Lock (EDL). Aside from
the
better braking under stress, EDL sucks. Hence the idea of the Torsen
conversion.

HTH,

LL - NY

On 1/21/08, David Torrey <davidtorrey2004 at yahoo.com> wrote:
>
> The EDL switch and the ABS are integrated.  I am
> currently having a problem with my 1993 100.  At air
> temperatures above freezing the green light in the EDL
> switch located in the console and the ABS light in the
> instrument cluster flash on and off in unison.  As the
> air temperature rises,  the two lights stay on
> continuously and the diff is locked.  I suspect there
> is a resistance change in an electrical component
> somewhere.  It's been too, damn cold to investigate
> further.  I can engage the rear diff with the switch
> when the car is stationary and the diff dis-engages
> properly at about 10 MPH.  The ABS is off light does
> not illuminate when I engage the diff with the switch.
> Puzzling.
>
> Best regards,
> Dave
>
>
>
> --- Ian Duff <iduff at comcast.net> wrote:
>
> > Why can't they just coexist?
> >
> > TORSEN puts torque to wheel that can use it, EDL
> > slows down spinning
> > wheel via ABS sensor/controller/brakes. Go with me
> > here: if you have
> > say the LR wheel on ice, the RR wheel on dry
> > pavement, TORSEN will
> > apportion torque to RR wheel while EDL will put the
> > brakes on the LR
> > wheel. Sure they could compete, but that's assuming
> > fairly equal
> > reaction times, which sounds far-fetched to me.
> >
> > Sounds like the dudes who have already done this
> > upgrade did it solo
> > (TORSEN install) and didn't disable (not even sure
> > you could w/o major
> > brain power) the EDL.
> >
> > Any reason not to just install the TORSEN and let
> > 'er rip?
> >
> > -Ian Duff.
> >
> > On 21 Jan, 2008, at 14:34, Postupack, Jeff wrote:
> >
> > >
> > >
> > > S-hedz :
> > >
> > > I have this 1995.5 S6 with EDL.
> > > I have this V8 Torsen I bought from K. Maddocks
> > >
> > > Come April, I will be working on the suspension in
> > the S6 and want to
> > > install the Torsen diff.
> > >
> > > Question is:  Since the 1995.5 ABS is not aware of
> > the manifold
> > > benefits
> > > of Torsen diff, how can I disable the EDL in the
> > car, once the
> > > Torsen is
> > > installed.?
> > >
> > > Don't think I'll want to EDL the Torsen in low
> > traction situations,
> > > nope, that doesn't make sense.
> > >
> > > I checked the Fred Munro CD Rom, my 5 years of S
> > car list archives and
> > > few other places.
> > >
> > > Can't locate any information about this..
> > >
> > > Any info here would be appreciated.
> > >
> > >
> > > Jeff Posto
> > > _______________________________________________
> > > S-CAR-List mailing list
> > > S-CAR-List at audifans.com
> > >
> > http://www.audifans.com/mailman/listinfo/s-car-list
> >
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>
>
>
>
>
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