Hi George:
I'm not really a "guru", but I have a Quaife Torsen in my supercharged
MR2. I think that the problem may not be caused by the diff. The
reason I say this is that a torsen is the *perfect* diff for autocross.
If you go into a tight corner and apply power, the inside rear *will*
lose traction, and the torsen *will* apply more power to the outside
rear tire. This will make the car turn *harder* because of the yaw
torque about the car's C.G. that the unequal rear tire drive forces
produce. I can *definitely* feel this effect in my car. For instance,
if I give too much throttle in first gear at a start while turning, I
can spin the car. In the days before my Quaife, I'd have just spun the
inside rear tire in these situations.
What I suspect your problem may be is too much power application. 790
lbs. on the front tires, total, is not much. With a V6 Fiero, you have
some power available. If you apply too much, you'll unweight the tires
and wash out the front end. I say this because I am also fighting this
to some degree in my car, which has probably 200-210 hp and 1000# on the
front wheels or so. I haven't yet decided if I can cure it with some
suspension tuning, but in my opinion and experience most problems are
curable by the driver if (s)he's thinking right. Good luck!
Mike Gruber
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