'84 to '86 5kT front caliper swap?

[isham-research.freeserve.co.uk at pop.pol.net.uk]

> Nate,
> I don't know what the heck you're talking about, because the G60
> calipers I have don't appear to have any part that is a separate,
> unboltable, "bracket."

> The G-60s I have bolt right on to the car- whatever you say, my
> car had G54s on there and now has G60s, so they do bolt right on.
> If you are speaking from personal experience, I don't understand
> how you can't just bolt them on.

> There are only two 17mm (IIRC) mounting bolts for the caliper.

> I've BTDT and _know_ that the G60s bolt up to a car w/ the G54
> brakes. If you're ever down here in my neck of the woods, you're
> welcome to come and take a look.

The terminology I usually use has 'caliper' referring only to the
heavy bit with the pistons in that rides on the guide pins.  The
guide pins are part of the mounting bracket, and _this_ is what
bolts to the hub using 17mm head bolts.  Audi usually uses the
terms 'piston housing' and 'caliper carrier' respectively.

The G54/G60 change is bolt-on - you can see this from ETKA for the
ur-quattro, where the change was made at 85-C-902000 without a
corresponding change in the bit the brakes bolt up to, which Audi
refers to as the 'wheel bearing housing'.  Note that Audi also
changed the master cylinder, probably to increase its diameter.
G60s need more fluid to operate safely, since they have an increased
piston cross-section.

--
 Phil Payne
 http://www.isham-research.freeserve.co.uk/quattro
 Phone +44 7785 302803   Fax: +44 7785 309674