[s-cars] Brake Caliper to Caliper Bracket Bolts

[Manuel Sanchez]

Tom,

Thanks for the Data.

The BBK system consists of 993TT calipers, OEM steel RS2 caliper  
brackets and 323x30 S8 rotors .

I have never quite reconciled the differences on some World Pac sites  
with regard to the rotors. I think some sites refer to these 323x30  
rotors are from a Lucas/Girling equipped (I presume, sliding) caliper  
for A8's and some ? S8's. There are listings for a slightly larger  
rotor for S8's fixed  345x30 with Brembo calipers.

Regards,

-Manny



Manny,

That's usually an Audi recommendation to change hardware, and to
inspect it in every case.  For the small M6 bolts for the carrier pin
on OEM Girling calipers it is good advice since those small bolts are
easily (and often) overtorqued, and those are the bolts that arrive
in the box with several brands of pads.  The caliper is restrained in
the carrier so these bolts don't carry the force on the caliper when
braking.  The caliper carrier to hub M12 bolts are torqued at 92 lb-ft.

The Porsche caliper mounting bolts are more robust because they do
carry the braking force.  The M12 bolts from Porsche are 10.9 grade
which would suggest 85 lb-ft max.  The 12.9 grade can carry 95 lb-ft
but I am not sure they need that 92 lb-ft.  Are we talking 993tt
calipers to RS2 adapter brackets on S8 rotors or  aluminum adapters
for 993tt rotors ?  I think the aluminum adapters call for 62 lb-ft
and I believe that is the Porsche spec as well.  Porsche does not
call for replacing that bolt, just inspect it and the bracket.  You
are not torquing to yield in either case.

If you are wanting a spare set of bolts, I would just get them from
Porsche.

Tom