[s-cars] Cracked Big Brake Brackets - ECS Stage 2

[Taka Mizutani]

Actually Eric, strangely enough, Audi gives you three different versions of
UrS brakes, depending
on where you live:

'91 to '93 UrS Euro-spec S4s have internal caliper single-piston "UFO"
brakes, 304x30mm rotors, IIRC.
The same notorious brakes that are on the '91 200q and the '90-91 V8q.

'94 to '97 UrS Euro-spec S4/S6s have twin-piston Lucas-Girling "HP-2"
calipers, 323x30mm rotors.
These same brakes show up on the C5 chassis A6 2.7T/4.2, the B5 chassis S4
and the D2 chassis A8
post-facelift.

'92 to '95.5 US and Canadian-spec S4/S6 have the ultra crappy twin-piston
Lucas-Girling "G60" calipers
over a 276x25mm rotor, IIRC.

So outside of the US/Canada, Audi equipped the cars with decent brakes. Our
numerous complaints about
the UFO brakes precluded Audi from equipping the S cars with the UFOs and we
never got the later HP-2
upgrade (I guess the sales volume was way too low for them to bother?).

If we got the Euro-spec brakes, we probably would not be looking for brake
upgrades for street driven cars-
the HP-2s and the UFOs have issues if you drive them really hard (i.e., at
the track).

I agree about the caliper brackets from a materials standpoint, but wouldn't
it be possible to machine caliper
brackets, even out of aluminum, that have enough durability to not be an
issue? All radiused edges, threaded
all the way through, time-cert'ed caliper bolt holes, stress-relieved? Maybe
that would be too expensive and
it would be cheaper to machine them out of tool steel at that point.

Taka