[s-cars] EDL Vs. Manual Diff Lock

[Joseph Pizzimenti]

Would Uncle Bob like to chime in on how he likes the
Torsen Rear w/EDL vs. open rear w/EDL?  Us poor slobs
with pre 95.5's MAY be considering installing a torsen
rear...Enlighten us.

Joe
--- Wayne Dohnal <dohnal at hevanet.com> wrote:
> >Can anybody discuss the pros and cons of each?
> Trying to decide if it's
> >worth it to go for a 95.5 S6 Vs. a 95
> >Jeremy Hull
>
> Keith Maddock has discussed this at length in the
> past.  If you can find his
> posts in the archives that would be the best.  I'll
> try to hit the meat of
> what he said, but he works with this stuff and
> explains it the best.  The
> only Pro of EDL is that it automatically engages.
> So if you hit some
> slippery stuff unexpectedly, it's there to help you
> when you might not have
> engaged the diff lock.  It's also cheaper to
> manufacture, since all of the
> hardware is already there for ABS.  It's only 'a
> simple matter of
> programming' which, of course, is free (sorry,
> Keith, I couldn't resist).
>
> Once the diff lock is engaged it is superior.  If
> one wheel has zero
> traction, all of the torque on the axle will go to
> the other wheel, the
> ideal situation.  With EDL a maximum of 50% of the
> axle's torque will go to
> the wheel with traction, while you're heating up the
> brake pads on the
> slipping wheel with the other 50%.  But you will
> never achieve even 50% of
> the torque to the wheel with traction because the
> EDL must let the slipping
> wheel rotate some to test if it slipping or not,
> resulting in further
> inefficiency.
>
> I'm amazed how fast my S4 will accelerate on packed
> snow with the diff
> locked.  And it does it in a straight line, too.
> But I can't help feeling
> that most people would rather have the sport
> steering wheel than a locking
> rear.
>
> Wayne Dohnal
> 1994 S4
>
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