Torsen II...

[quk@isham-research.demon.co.uk (Phil Payne)]

In message <199802261239.HAA08508@camel8.mindspring.com> audidudi@mindspring.com (Jeffrey J. Goggin) writes:

> Personally, I think I'd put the other Torsen in the FRONT and not the rear
> ... the Ur-Q was derived from a FWD chassis and, IMHO, it responds well to
> being treated like a FWD car, both in terms of setup as well as driving
> style (in fact, I'm running nearly the same alignment settings on mine that
> I ran on my FWD '81 4k!).

The MB (TORSEN) ur-quattro is NOTHING LIKE a FWD car.  Chalk and cheese.  
Absolutely no resemblance in any way at all.  Our 'other' car is a FWD Passat 
with an I5 - utterly different beast in every way.  FWIW - this is the list 
of major changes between the 1987 WR ur-quattro and the 1987 MB:
 
    1988 - Chassis Number - JA 900...     and 1989 - Chassis Number KA 900

    In October 1987 the 2226 cc MB Engine replaced the previous WR engine -
    fitted with smaller turbo cooled by oil and water, torque sensing
    (TORSEN) centre differential, limited-slip rear differential, new ABS
    design with accelerometer.  New idle stabilisation system.  The fuel
    injection system was completely overhauled, with a new metering head -
    the warm-up regulator was no longer vacuum controlled, and system
    pressure was regulated by a separate valve.  A frequency valve provided
    ECU control of full-throttle enrichment.  A dashpot was fitted to the
    throttle valve to delay throttle closure, allowing the new type of idle
    stabilisation valve time to react.  Wastegate now controlled by inlet
    pressure, but ultimately overridden by computer switching air from
    either end of the turbo into plenum chamber previously open to
    atmosphere.  New steering and brake assist design, using a tandem pump
    with a hydraulic oil cooler in the steering circuit.  Hydraulic
    self-adjusting tappets were used, and only one oil filter was fitted.
    Body remained the same as earlier model.  Minor changes were made to the
    interior including a switch to lock the rear limited-slip differential
    at speeds too low for the mechanism to work on its own, and a new orange
    digital dashboard with an electronic odometer and no boost gauge.

-- 
 Phil Payne
 UK Audi [ur-]quattro Owners Club