[s-cars] UrS4 brake hardware question

Taka Mizutani t44tqtro at gmail.com
Wed Oct 3 07:43:02 PDT 2007

True- the cheaper and unpopular upgrade would be to get some UFO assemblies
and retrofit those onto the UrS- the UFOs work significantly better than the
G60 setup, are very cheap (rotors got a lot cheaper lately) to run and fit
under 15" wheels for snow use.

My old 200 with UFOs worked a lot better than the 5ktq with G60s, even
though the 5ktq was several hundred pounds lighter. Going to 996 calipers
and 320mm rotors was even better, but that's outside the scope of the


On 10/3/07, James Murray <james.murray at ericsson.com> wrote:
>  I heard the rotors where bigger, but wasn't sure about the calipers... oh
> well, if that's the case then it's cheaper to stick with same setup but
> better components like you mention below.
> /J.
>  ------------------------------
> *From:* Taka Mizutani [mailto:t44tqtro at gmail.com]
> *Sent:* Wednesday, October 03, 2007 10:34 AM
> *To:* James Murray
> *Cc:* RM; s-car-list at audifans.com
> *Subject:* Re: [s-cars] UrS4 brake hardware question
> Euro S4s originally came with UFOs like the '91 200q and early V8q, the
> later cars came with
> the Lucas-Girling HP-2 calipers, same rotor dimensions as the B5 S4tt.
> Those rotors are not compatible
> with G-60 calipers- they are 314x30mm IIRC.
> The stock rotors on the US UrS are 276x25mm.
> If you need something with more initial bite or higher coeff. of friction,
> try EBC Yellowstuff, Hawk HP Plus- I don't
> know how Porterfield or Pagid measure up- you shouldn't use race pads on
> the street- they simply don't work in cold
> weather, they eat up rotors quickly if the brakes are in the proper
> operating temp. and they make a ton of noise.
> Taka
> On 10/3/07, James Murray <james.murray at ericsson.com> wrote:
> >
> > Rolf, what about going to the larger European UrS4/S6 rotor? I think it
> > uses the same G60 caliper, per but you have a larger rotor diameter, I
> > gather the bracket needs to be changed?(not sure the details). Perhaps
> > this is an intermediate upgrade at a lower cost?
> >
> > I heard the Euro S4's had larger rotors, but never investigated the
> > exact differences between the models. Perhaps someone will chime in...
> >
> > /Jamu.
> >

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