[s-cars] UrS4/S6 Front Alignment Specs

[Fred Munro]

The official UrS4/S6 front alignment specs from page T44-4 of the Bentley
are as follows:

Toe: spec +15' (+0.25 degrees), range +5' to +20' (+0.08 degrees to + 0.33
degrees)

Camber: spec -50' (- 0.8 degrees), range -15' to -80' (- 0.25 degrees
to -1.33 degrees)
	Note: Max difference between sides 30' (0.5 degrees)

Caster: spec +55' (+ 0.91 degrees), range +15' to +95' (+ 0.25 degrees to
+1.58 degrees)
	Note: max 1 degree

The figures in brackets are my conversions of minutes to degrees.

Fred Munro
'94 S4


-----Original Message-----
From: Tony [mailto:tony.curran at sympatico.ca]
Sent: July 10, 2004 1:22 AM
To: Fred Munro; RubEric at aol.com; s-car-list at audifans.com
Subject: Re: [s-cars] Tire Wear - Lowered S6


Here is a link to theCS Tuning site where they are demonstrating the
benefits of their camber plates. The vehicle alignment reports at the bottom
clearly show spec is -1.3 deg to -0.4 degs. This is the same as the outfit
who aligned my car, from the report provided.

My report also showed what the pre-alignment camber was.
Before
Left -1.1 deg, Right -2.0 degs.

After
Left -1.3 degs, Right -1.5 degs

My car was previously owned by someone in Montreal which is infamous for its
potholes. I suspected the camber was out as the right side tire wear was not
consistent with the left side. After the 40000kms in two years, there has
been some extra wear but no shredding and no metal visible. I delayed
re-aligning as I knew I would be replacing suspension and tires in not too
distant future.

So what is it that has caused Eric's tire to shred. Could it be the
combination of camber spec and wider tire - mine are stock 225 tho they are
all season which are due to be change soon.

Tony
96 S6


----- Original Message -----
From: "Fred Munro" <munrof at sympatico.ca>
To: <tony.curran at sympatico.ca>; <RubEric at aol.com>; <s-car-list at audifans.com>
Sent: Friday, July 09, 2004 5:08 PM
Subject: RE: [s-cars] Tire Wear - Lowered S6


> The front camber alignment spec for the UrS4 (from the alignment machine
> printout at my local dealer) is -1.08 to -0.08. Caster is +0.25 to +1.58
and
> toe is +0.04 to +0.17
>
> The inside shoulders of my tires were wearing at a camber of -1.04 with
the
> stock suspension.
>
> HTH
>
> Fred Munro
> '94 S4
>
>
> -----Original Message-----
> From: s-car-list-bounces at audifans.com
> [mailto:s-car-list-bounces at audifans.com]On Behalf Of
> tony.curran at sympatico.ca
> Sent: July 9, 2004 1:12 PM
> To: RubEric at aol.com; s-car-list at audifans.com
> Subject: Re: [s-cars] Tire Wear - Lowered S6
>
>
> Eric,
>
> I too have just lowered my 96 S6 with Eibachs/Bilstein. My car has dropped
> 20mm front and back tho back has 10mm spacer. I maintained the original
> camber plates. Camber after alignment is -1.3 left and -1.5 right. I was
> told spec is -1.3 to -0.4 - I'd point you to the ECS Tuning link that
shows
> this but I don't have it on my office PC.
>
> I will keep an eye on the inside edges for wear.
>
> Tony
> 96 S6
>
> >
> > From: RubEric at aol.com
> > Date: 2004/07/09 Fri PM 12:58:40 EST
> > To: s-car-list at audifans.com
> > Subject: [s-cars] Tire Wear - Lowered S6
> >
> > The subject is my treasured S6, chipped w/digital boost gauge. I have 18
> inch
> > Avus wheels with SP 9000 235-40x18 tires and big reds. I installed
Eibach
> > springs and Bilstein shocks lowering the car about 1-3/4 inches. (The
> Bilstien's
> > were harsh - the car rode as if the tires had 100 lbs of air - so I
> removed
> > them and reinstalled the original equipment shocks. The resulting ride
is
> > wonderful.)
> >
> > With slotted strut mounts, the car aligned with camber at -1.5 deg L
> and -1.2
> > deg R. Specs are  - 1.1 deg to  -0.1 deg. I realized this was out of
spec
> but
> > it was not FAR out, was it? My plan was to monitor tire wear and to
> replace
> > the camber plates if wear became evident.
> >
> > Well, I watched for unusual tread wear but none appeared so I concluded
> that
> > I had avoided the expense of a caster/camber adjustment system and was
> okay.
> >
> > Well, WRONG, WRONG, WRONG!  I was looking in the wrong place! The tread
> did
> > not show evidence of excessive wear - the wear was taking place on the
> inside
> > shoulder of the tires.  I have never seen such wear. The inside shoulder
> was
> > actually worn concave and the steel belts were showing along about a
foot
> of the
> > circumference! (Pics available, if of interest.)  This was after about
> 8,000
> > miles!
> >
> > Well, I ordered four new SP 9000's and 2Bennett's camber/caster system.
> > ($O,uch)  I am very impressed by how beautifully made these plates are.
> > Installation was very easy. Thanks very much for the group purchase.
That
> really helped.
> >
> > Alignment with the 2 Bennet System yielded -0.8 deg Left and - 0.5 deg
> right,
> > about in the middle of the spec, with everything else within specs.
> >
> > I did not think being only so 'slightly' out of spec would result in
such
> > spectacular wear and I wonder if it there is some other problem. Altho I
> now seem
> > to be within spec I will monitor tire wear, especially on the inside
> > shoulders, much more carefully.
> >
> > My thoughts:  If you're gonna' lower, you gotta' change the plates!
> >
> > Good Luck,
> >
> > Eric
> > 95 S6
> > Olympic
> > RT 10
> > XK 120 (Hers)
> > Mk IV (Hers too!)
> > FLHR
> > FLHRC (Hers)
> > Chry CQ
> > Some trucks.
> > _______________________________________________
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> >
>
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