[s-cars] Of EDL and switches...

[Keith Maddock]

Taka,

The viscous center diff of my 93 Subaru Legacy with manual trans was advertised as a 50/50 F/R torque split in stable conditions.  In comparison, the auto-trans version of these cars used a electronically controlled clutch coupling which had a 90/10 F/R torque bias in stable conditions.

Keith "The Subie was great, but the Audi is so much nicer**" Maddock

**other than reliability.. hehe, though to be fair the Subie got a trans rebuild at 55k under warranty....


****************************************************************
Keith Maddock, TRW Automotive,  Koblenz, Germany
Slip Control Systems, Systems Design, Traction Control
+49 (0)261/ 895 2474     -    -    keith.maddock at trw.com

>>> <t44tq at mindspring.com> 14:57:50 04.11.2002 >>>
I might be totally wrong on this, but my understanding
of VC center diffs is that the car is 100% FWD until slip
occurs, then torque is distributed to the back.

In that scenario, your car has no drive in the rear and
on an incline, accelerating, you've transferred weight
to the rear before the drivetrain can catch up, thus slippage.

There is a steep hill on a nearby on-ramp and I've never
experienced the scenario you've described in any Audi quattro
I've driven on that part- 5ktq, 200q, A4q.

Taka

-----Original Message-----
From: s-car-list-admin at audifans.com
[mailto:s-car-list-admin at audifans.com] On Behalf Of J. Khang
Sent: Monday, November 04, 2002 8:39 AM
To: Keith Maddock; rpastore at animalfeeds.com; russ at panneton.name
Cc: s-car-list at audifans.com
Subject: Re: [s-cars] Of EDL and switches...


 --- Keith Maddock <Keith.Maddock at trw.com> wrote:
>
> In the case you mention, with a stock car you're
> SOL.  Granted, even with RS2 upgrade, its got to be
> a pretty slick road to unstick one wheel at 40mph.
> However, I would say there is a definate advantage
> to having a torsen in the back for this case.  IMHO,
> I don't think it would even "hunt" or "wiggle",
> unless the surface is very uneven (patchy bits of
> wet and/or ice).

It happens, did it in a Celica GT4 (rear Torsen,
centre VC) WOT in 2nd gear up a steep incline,
overtaking in wet/icy conditions. I could feel the
back end move around slightly.

The steep incline reduces traction so you wouldn't
need an RS2 setup to cause problems.

Jonathan
'96 S6

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