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Torque-biasing diff remarks (m) (archive)
[ Follow Ups ] [ 5-series (E39) Message Board ] [ Msg. Board FAQ ]
Posted by JEM on March 05, 2001 at 00:22:09:

In Reply to: more Quaife impressions posted by karl on March 04, 2001 at 18:06:30:


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?

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.


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.

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