Would this work?? el skolnick or anyone who has driven a 90 and UrS6 or S4

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Sep 15, 2003 | 06:04 PM

quattro90S6

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From: Allston, MA

Would this work?? el skolnick or anyone who has driven a 90 and UrS6 or S4

I noticed this a while ago, but the B4 90 and the 95' S6 have very simular looking brakes, rotor size and caliper. But would it be possible, i mean putting S6 brakes on a B4, i have driven both obviously, and why el skolnick would have a idea, even though you have a B3. But the S6's do seem to work very well for a car that is much bigger then the B4 yet looks to have the same brakes. So am i a dope or is there hope?

Sep 15, 2003 | 07:08 PM

kung_fu_4.2

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Yes and no...here is the full story

Ok, first. The B4 has a stepped wheel bearing INNER bore, but the outer bore is the same as the urS4. So, theoretically you can put B4 wheel bearings in a urs4 hub -I am confirming/disproving this tommorow for my own project. Next, assuming you mount up the urs4 hub, the brake rotor has a 3mm (1.8") taller hat which puts the rotor that much closer to the strut assembly. No real problem there becuase you can just put an 1/8" washer UNDER the caliper bracket where the bolts go through it. The caliper bracket is IDENTICAL for the two cars and bothe use G60 calipers. HOWEVER, the urs4 has calipers that are 'inside out' when compared to B4 g60s. The big piston is on the wrong side because the urs4 has front mount calipers and the B4 has rear mount. You could flip them around but then you could never bleed the system properly. At any rate, it doesn;t matter becuase the B4 calipers the same otherwise.