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RE: Torsen Stuff

Seems perfectly reasonable. The very first quattros had no centre diff - just a direct F-R connection ala normal 4WD. Complaints (by Herr Piech's wife) about the car 'not wanting to move' in tight, slow parking-lot type turns prompted development of the center diff. The vast majority of Rally cars ran with no center diff, or 100% locked (effectively the same). This also seems perfectly reasonable. Slip angles are almost always very high and the relative distance the F & R must travel is very small Vs the L-to-R wheels' difference. Even on dry pavement there is no major problem with no center diff at racing speeds due again to the relatively large slip angles involved and the fact that the F & R are not travelling vastly different distances when the car is in a typical 4-wheel drift at speed. The BTCC quattros seem to have proven successfully this to be the case most recently.

What did the SCCA Trans-Am and IMSA quattros run for diffs? None/locked?


Phil Payne decided to speak these words:

>Others will comment on the other parts - but the Touring Cars had
>no Torsens - in fact, as far as I can tell, they had no centre
>differentials at all.  I've seen the drivetrain stripped on the bench
>at Audi Sport, and I've spent three days looking after Biela's 1996
>practice car for Audi - an hour of which was spent underneath looking

Right, but according to Christopher Morlock, this is a horrible system 
because its just 4wd with no torque transfer and is backwards and way too 
simplistic to be any good...

can you tell im pissed at him?


Michael Sheridan Williams
ICQ# 11740998

1985 4000 S Quattro
175,000+ miles
1986 Oceanic Blue (swoon...), 4000CS Quattro
1985 Coupe GT: Parting out, just ask...most parts available...