[s-cars] Anyone ever use 944 Turbo calipers on an S6?

[Linus Toy]

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At 10:06 PM 11/15/2002 , Richard Tanimura wrote:
>I believe the standard rotors for the Porsche S4 calipers were 304 x 32
>which are the rotors from the 3.3 l turbo. I thought it was this size that
>was used on the RS2. Could be wrong since I have never measured the RS2
>rotors.

The FA shows the RS2 original rotor as 304x32.  Further review of the FA
shows two different calipers--one about 5mm taller than the other (based on
the bolt fixing the caliper to the same bracket).  5mm taller implies a
10mm greater diameter, though this doesn't account for actual location
radially vis-a-vis the rotor.

Coincidentally, the normally aspirated 993 stock rotor size is
304x30...hmmm...the NA 993 uses a caliper that sits 5mm lower than the
993tt's BR caliper (again, based on differences in bolt length used to fix
caliper to strut).  It is a simple (but $$$) bolt-on conversion to put
993tt BR calipers on a NA 993.

>Getting back to the 951 calipers, I think they would make a nice moderate
>upgrade. I don't track my car and the 951 calipers are a nice trade off.
>Smaller, lighter calipers than the S4, less rotating mass in the rotors 298
>x 30, less unsprung mass. Not as good as the Porsche S4 but better than the
>G60 and they fit my 16"s. As noted, the RS2 adapters would fit the mounting
>holes of both the Porshce S4 and the 951 calipers, but since the 951 takes a
>slightly thinner rotor, the problem might be offset in the axial direction.

According to some posts, using the RS2 bracket with 993tt calipers over
A8L/urS8 rotors leaves the caliper about 0.5mm off-center--nothing
critical--I'll find out first-hand very soon :)  Remember that the A8L
rotor is only 30mm vs. the 993tt rotor at 32mm.

>-----Original Message-----
>From: s-car-list-admin at audifans.com
>On Behalf Of t44tq at mindspring.com
>Sent: den 16 november 2002 03:50
>To: S4audinut at aol.com; WeSki at icubed.com; s-car-list at audifans.com
>Subject: RE: [s-cars] Anyone ever use 944 Turbo calipers on an S6?
>
>I don't know- the RS2 used both 314x30 and 322x32 rotors, right,
>depending on the option? I don't know if the placement would put the
>caliper in the right place even if the bolt spacing was the same.
>Taka

Interestingly, 314x30 IS a common (?) Audi rotor size, as used on the Euro
S6 and A8, just a different bolt-circle from the RS2.

--Linus


*--------------------------------------------------------------------*
*  Linus Toy                      Insanity is doing the same thing   *
*  Mercer Island, WA              you've always done and expecting   *
*  linust at mindspring.com          different results                  *
*                                      - Roger Milliken              *
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