Audi in London

[Ed Kellock]

Part of what you say is incorrect.  Torsen is never controlled or "cut out"
by electronics.  The manual locking of the rear diff on certain era of
vehicles is defeated at about 20mph, but Torsen is always active.

Torsen isn't everyone's ideal either.  There's been great debate about it's
ultimate worth.  I believe most everyone is in agreement up to about 9/10's
and then it's function is considered not beneficial by some.  

The lock-up cut out relative to speed is only applicable to rear diffs that
can be locked manually by an electronic switch.

Early cars, up to 88 had fully manual lock control.  Torsen was introduced
in 89 with the electronic rear diff lock switch.

Ed

> -----Original Message-----
> From: quattro-bounces at audifans.com 
> [mailto:quattro-bounces at audifans.com] On Behalf Of Mark J. Besso
> Sent: Tuesday, February 03, 2009 11:17 AM
> To: Mark R
> Cc: Bares, Vittorio; quattro at audifans.com
> Subject: Re: Audi in London
> 
> 
> I beg to differ.  The "real" quattro's have individually lockable 
> differentials for the center and rear.  They may seem primitive, but 
> they sure whoop Torsen's.
> 
> Not to mention, the Torsen-equipped cars have electronics 
> that cut out 
> the lock-up feature over a certain speed.  Just when they're 
> starting to 
> get fun, the lock-up is disabled.  Boo!
> 
> 
> 
> Mark R wrote:
> >> Especially if you have something like 19 inch summer 
> tires.....! But 
> >> the TT doesn't have 'real' quattro anyways, right? ;-)
> >>
> >> Dan D
> >> '04 A4 1.8Tq MT-6
> >> Central NJ USA
> >>     
> >
> >
> > Dan hit the nail on the head!  I just got back from 
> instructing at yet 
> > another winter driving school (NAAC) and good tires are of 
> course the 
> > number one thing to have for the conditions.  But "real" 
> Quattro (with 
> > a torsen center diff) is head and shoulders above anything else, 
> > ESPECIALLY Haldex based systems.
> >
> > Subaru and BMW get is mostly right, but there's something 
> about real 
> > Quattro that is absoluitely tops.  And the control/fun of 
> the Torsen 
> > systems go from understeer to subtle oversteer at just the right 
> > moment (when the fronts hook up)....  gotta love it!
> >
> > Mark Rosenkrantz (who would take Haldex over FWD or RWD, 
> but any other 
> > AWD system over Haldex). 
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