[urq] urq Digest, Vol 51, Issue 10, Brake Upgrade.

[CARDCONSYS at aol.com]

Here is a note I have kept as I did my  upgrade:
 
UrQ conversion to 1992-1994 S4/S6/V8 Brakes (G60 type)
19th February  2004, updated 20th September 2004, updated 3rd February 2005.
 
To do this conversion you will need the following:
Front:
Use S4/S6  G60 Caliper/Bracket Assembly which will fit exactly on the 
existing UrQ strut  mounting holes.
You cannot use either the standard UrQ disc(437-615-301A) or  the S4/S6 
disc(441-615-301A).
The UrQ disc is very slightly too great a  diameter and is not thick enough. 
The S4/S6 disc is the
correct thickness and  diameter but has the wrong ‘top hat’/dish/offset 
dimension for the UrQ  hub.
Use disc from 100/200/5000 Quattro PN 447-615-301A/B. 
There is an  equivalent Ate Power disc you might prefer(from Z motors) PN  
24.0325-0102.1(525102).
For pads suggest Hawk HPS compound pad number  HB270.
 
Rear:
Use the complete S4/S6/V8 setup, calipers and discs. You will also  need to 
change to the pair of handbrake cables used on the 1984 and later 4000  
Quattro, and if pre 85 car, a new handbrake yoke to accommodate the ‘hook type’  
cable ends.
Disc PN 857-615-601.
Suggested Hawk HPS Pad  HB271.
Handbrake Cables Left 857-609-721D, Right 857-609-721E.
Handbrake  Cable Yoke 437-711-097.
 
Suggest you discard the S4 intermediate hydraulic hose support bracket on  
the front caliper(it can interfere with the strut), and replace with a suitable  
SS protected Teflon line directly from the caliper to the body connection. 
You  could use the standard S4 hydraulic hose at the rear but it is better to 
replace  it with SS protected Teflon.
 
Martin Dapot
83 UrQ




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