4matic vs quattro

[Dave.Eaton]

actually, not all that easy to do.  remember that an open diff will always
disribute torque equally.  all you can do is to modify the ability to
*support* torque (i.e. dependent upon traction) at either side of the centre
diff (done by working on the end - axle - which has the *least* ability to
support torque).  once you have done that, the centre diff will then split
the same torque to the other end of the car.

inexpensive though...

hth,
dave
'95 rs2
'90 ur-q
-----Original Message-----
From: auditodd at attbi.com
Subject: RE: 4matic vs quattro
Date: Fri, 10 Jan 2003 21:19:31 +0000

Why couldn't the center diff be just a "normal" open differential?

Wouldn't really have to be a VC or Torsen. By using the EDL to control all
four
corners, you could use just an open diff in the center. An open diff would
be
able to compensate for differences in speed between front and rear, and yet
if
both rear brakes are minutely engaged, it would send more power to the front
axle.

I bring up the point because the MB Glendenwagen uses open diffs (with some
sort
of locking mechanism) in all three positions, then you can "lock up"
whichever
one or more you need to get unstuck.
> At 12:53 10-1-03 -0800, Joseph Pizzimenti wrote:
> >So does it run off of a center torque sensing
> >differential and use EDL front and rear?  Or is it a
> >VC system?
>
> Ad text was kinda unclear on that, but I believe it to be the latter.
>
> Tom
>