[A4] Quattro System in '99 A4
brogers at terrix.com
Fri Feb 29 09:46:51 PST 2008
I'm not sure how good of a comparison this is because my A4 was a '98.5
1.8Tq - and I'm not sure what happened, if anything from then until '99
MY - just never know with Audi.
So anyway my car did not have ESP - just EDL which by my understanding
applies brakes to wheels slipping compared to others. So the way I
understand it if they are all slipping - then no brakes applied. With
Nokian WR snows the A4 was absolutely incredible in the snow - never any
power reducing from the ECU (no ESP) and very predictable. Easy to get
throttle over steer and very easy to get straight when you wanted to. I
would think if you have ESP you would also have a "Defeat" switch on the
dash (I do in my '01.5 S4 - and I always defeat it) but I'm not sure.
I'm not sure which motor/tranny combo you have but a manual tranny with
chipped 1.8T you get all the wheel spin you want. Auto V6 I'd bet you
won't - we don't in our Passat V6 4Motion.
'84 ur quattro 20Vt
'98.5 A4 SOLD
From: a4-bounces at audifans.com [mailto:a4-bounces at audifans.com] On Behalf
Of Derek Pulvino
Sent: Friday, February 29, 2008 10:03 AM
To: a4 list
Subject: [A4] Quattro System in '99 A4
Can somebody link me to a page that describes how the quattro system
works in this vintage of A4?
As I understand it, this year of the car of course uses the torsen but
there is no locking differential at this point; any wheel slip that
makes it's way through the torsen is counteracted by braking at a wheel?
Were they also incorporating any kind of throttle control at this time
(i.e. if wheel slips, throttle is backed off) or did that not get
implemented until the drive-by-wire throttle was installed?
And what's the story with the ESP? When was usage of that system begun?
Best I know, that's not included no my vehicle.
I'm all the more curious these days as I recently had my first snow
driving. The car generally felt much more stable or maybe I'd say
"dumbed down." It was very difficult to get any wheel-spin in the snow,
but tracking was good on and off the throttle and brakes. Just trying
figure out what exactly is going on where the rubber meets the road.
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