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RE: Real quattro
Dave E writes
>yes this is correct - the haldex is basically a "hang-on clutch".
>but in defence of the unit, there are a number of very ruputable
>manufacturers who use very similar technology. the big advantage of the
>haldex is that it is computer controlled which means that the circumstances
>governing activation, duration of engagement etc are decided by computer,
>rather than my simple mechanics as in a torsen or a vc.
I question "Big Advantage". Haldex is hardly an "active" differential in
terms of performance or advantages. Bottom Line: Computers controlling
differentials can be fooled just as easily as mechanical differentials. As
a fwd to awd device, "big advantage" seems somewhat of an oxymoron.
Understeer v ?
I'm not sure that audi isn't constantly striving to find something better,
when they might have already had it from the get go. The early articles on
the coporate search on why better fuel economy and tire wear with Gen I awd
seem to have been forgotten. Want active diffs? How bout using all those
sensors to activate the lockers v true 4 wheel edl, or use the multiplate
electronic locking used in the early v8's. Seemless to the driver a too high
priority? At the expense of what? Better traction and performance. Given
audi's history in the last 10 years, and now the Haldex, I be guessing
priorities are just changing. Where is the real "quattro" in the "quattro
advantage" I personally heard Hurley Haywood still singing at Monterey?
Falling into the same realm of "DOHC" on top of the VR6?
My .02 arbitraged thru the peso