Rear caliper upgrades

[Dan Bubb" <jdbubb@ix.netcom.com (Dan Bubb)]

90 Passat rear calipers look to be the same as the later style A2 from the
data in ETKA. i.e. they will bolt up but the bleeder screw will be on the
bottom and it looks as if they also feature the patented e-brake lock
mechanism!

As far as A4 calipers, I think they should not be mounted in a Scirocco
because the piston is much larger than stock or even A3 calipers. I don't
know piston diameters off the top of my head, but IIRC the piston area was
~33% greater that stock. So, 33% more rear braking force. Too much IMHO. I
know a guy that is running these on a Rabbit GTI and he is using an extra
proportioning valve in series with the stock proportioning valves to get the
pressure low enough so he doesn't constantly lock his rear brakes.
I think the piston is just too damn big.
If you have the passat calipers and they work there's no downside to
installing them. I didn't have any working calipers, so went with the A3's.
Dan
Need to come up with a name for my POS/PITA 16V.

----- Original Message -----
From: "Rick Alexander" <ralexander03@snet.net>
To: "The list" <scirocco-l@scirocco.org>
Sent: Tuesday, May 06, 2003 10:06 PM
Subject: Rear caliper upgrades


> Tapping into the vast knowledge of the list here.
>
> Does anyone know if '90 Passat rear brakes will work on my '87 Scirocco?
>
> Next question: I can get a kit from Mark at Adirondack for new A4 calipers
> and adaptors to fit an A3. Will this fit on Rolling Roc?
>
> Will there be e-brake cable issues? I'm aware of the bleeder being on the
> bottom but I'm willing to deal with that not to have the dreaded "lock up"
> feature.
>
> Rick Alexander
>
>
>
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