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In Reply to: Torque-biasing diff remarks (m) posted by JEM on March 05, 2001 at 00:22:09:
Cornering is weird and will take some getting used to. Nailing the gas through a corner results in extremely obvious pulling on the outer (traction) wheel with the car receiving a whole lot more push through the turn. It feels strange and will take some getting used to. The dynamics of coming though a turn under throttle are a little different, but a whole lot more power can be applied.
I assume you don't mean 'push' in the NASCAR sense (that is, understeer) but 'push' in the thrust sense?
That's correct.
Preloaded clutch-type limited slip diffs tend to promote understeer, amount dependent on how much preload the diff has.
At the limit, a car with a Quaife or other torque-biasing diff will feel somewhat 'looser' (in reality, this just means it's not creating 'push') but in my experience (not in the 540i) very smooth and predictable.
This makes sense I suppose because a clutch based LSD will have a point of "grabbing" whereas an ATB is supposed to be a more gradual & smooth trasnsition of power to traction wheel. At least, that's what I've read. :-)
Unfortunately, having never had a LSD in a previous car I cannot compare the feeling.
Anyway, I'm much more impressed now that I've got some decent rubber on again. I'll be needing new rubber for the rear soon anyway, so I think I'll upgrade to 245's in a sticky tire (not interested in moving to 18" for now).
What year's your car? '98? Why not some 17x9 7-spokes for the rear, and 255/40-17 rear tires? There's no real performance benefit to 18in tires.
It's a '99. It currently has 17"x8" all around. Perhaps I could look at getting 17"x9" on the rear (if I can get them in matching style) to allow me to get wider rubber.
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Thanks, Karl
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