Potentiallly all-VAG new rear brakes for urQ and 4000Q

[Mark Rosenkrantz]

Remember, if you change the piston volume or the location of the caliper
from the center of the hub, you've changed brake bias.

Mark Rosenkrantz

On Thu, Feb 9, 2012 at 6:34 PM, <laraa at sympatico.ca> wrote:

> Hi all,
>
> My 1983 urQ (with the early style rear calipers, pre-1984) is now under
> surgery : we are trying to install some New-Beetle/Golf IV/Jetta IV
> aluminum
> calipers. These are cheap, even loaded with pads and carriers, easily
> available and more important, new ! I paid 165$ each, complete new with
> pads
> and carriers.
>
> Note : the links in the text are only there for their good pictures, that's
> it.
>
>
> So far, the calipers
> (
> http://www.ecstuning.com/Volkswagen-New_Beetle--2.0/Braking/Calipers/ES2593
> 82/<http://www.ecstuning.com/Volkswagen-New_Beetle--2.0/Braking/Calipers/ES259382/>)
> are on the car, albeit without the nice new sliding pin carriers that
> came with the calipers
> (
> http://www.ecstuning.com/Volkswagen-New_Beetle--2.0/Braking/Calipers/ES4502
> /). However, the NB caliper bolts directly to the urQ carriers. That is
> plan
> A, the easiest.
>
> Pan B is a little more involving : If your carriers are too worn, then one
> can install the shiny new NB carriers by machining the mounting surface by
> about 12 mm and still use the standard urQ rear discs. Easy for any good
> shop.
>
> Plan C is to bolt the carriers without any modification (except longer
> mounting bolts, you need M10 x1.25 x 30mm) but you then must use the Passat
> Synchro rear discs (8D0 615 601A) which are 12 mm less deep than the
> standard urQ rear discs (437 615 601). Wheel spoke clearance might be an
> issue with the stock 6 in or Fuchs 7 in wheels, but I'm not even sure.
>
> Brake hose : I've used some Passat rear brake hoses, since the NB calipers
> use a bigger (12mm) hole than the old Audi caliper (10mm). 4B0 611 775C is
> perfect, and it even comes with the correct banjo fitting with a new bolt
> and crush washers. See a similar hose here :
> http://www.ecstuning.com/Search/8e0611775j/ES8932/ but beware that it's
> not
> the correct hose, this one here is too short.
> The correct 4B0 611 775C hose is identical, but longer.
>
>
> Now, the big part : the parking brake. I'm in the middle of terminating
> this
> with very little mods. I'm using 4000Q 85-87 stock rear brake cables which
> are correct for the chassis and, obviously, stock calipers. It looks these
> will fit the stock NB calipers, but with some light modifications (cable
> will reach the caliper from top, instead of bottom as on the NB). We are
> using some VW Golf clutch cable fittings
> (http://www.ecstuning.com/Search/171798105/ES251092/) to install the stock
> cables backwards in the caliper's bracket. Don't be afraid by the ECS
> tuning
> price : I paid 4.20$ each at my FLAPS for 2 Topran kits # 102 648 755.
>
> Look again at this picture, for clarity :
>
> http://www.ecstuning.com/Volkswagen-New_Beetle--2.0/Braking/Calipers/ES25938
> 2/<http://www.ecstuning.com/Volkswagen-New_Beetle--2.0/Braking/Calipers/ES259382/>
> What we want to do is weld a big washer on the pivoting arm, slide the
> cable
> sheat in there, and then block the cable ball end in the big hole at the
> bottom with the VW clutch thingy. This way, the cable will be more or less
> in the same spot as before, but we need a way to bend it permanently at 90
> degrees to clear the half-shaft, strut and various other bits. I'm working
> on something, but if you have an idea... go ahead.
>
> Since this is not completed yet, I'll let the list know how it goes. It
> looks indeed that finally, my car will get effective and long-lasting rear
> calipers for the first time in years.
>
> Louis-Alain
>
>
>
>
> _______________________________________________
> quattro mailing list
> http://www.audifans.com/mailman/listinfo/quattro
> http://www.audifans.com/kb/List_information
>