[s-cars] Pseudo Warped Rotor?

[Kirby Smith]

After 5 Audi's, I've become convinced that Practically anything uneven,
even rust on the rotors, can react with flexure in the suspension to
cause this effect to some degree.  The problem is finding the flexure. 
Beyond replacing all the subframe bushings, consider the anti-roll bar
bushings.  They are in a good place for allowing yaw oscillation.

kirby



Mark Strangways wrote:
> 
> Have you checked the wheels, bent rims can cause effects like warped rotors.
> BTDT...
> Also 2 piece rotors need to be trued after initial torguing.
> 
> I had to just touch my 993 / bira combination after a few weeks of good use.
> Mark
> ----- Original Message -----
> From: "D Cosby" <dccosby at hotmail.com>
> To: <s-car-list at audifans.com>
> Sent: Monday, May 10, 2004 5:24 PM
> Subject: [s-cars] Pseudo Warped Rotor?
> 
> > Just put on a new set of front rotors to replace the severely worn set
> that
> > was also slightly "warped" on the front passenger side. A new set of
> rotors
> > (and pads) later the "warp" feels exactly the same.
> >
> > The car feels fine under braking around town. At highway speeds there is
> the
> > classic thumping sound and very slight kick back through the pedal. The
> > problem gets worse with heat. This is the exact feel I had with the old
> > rotors and appeared with the new set at mile 1.
> >
> > I'm running the Bira system 1 setup (fixed Boxster calipers + A8 rotors).
> >
> > I'm not inclined to believe that my new rotors are identically warped to
> my
> > old set right out of the box (the old rotors were OEM A8, the new are 2
> > piece ECS replacements). I'm going to yank the rotor and make sure the hub
> > is clean. Any other suggestions? Bearings?
> >
> > Thanks.
> > Dwayne
> >
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