The best way to get rid of understeer in a front wheel drive car is to stiffen the rear and soften the front. The best way to do this is to put a larger sway bar on the rear. One of my friends has a Probe with a rear bar the size of a coke can and a front bar the size of a pencil. This makes the steering input a little slower but gets rid of understeer. What I did on my Scoupe, since no one has sway bars, I have 500lb Eibachs on the rear with the koni adjustable shocks. When I go autocross I turn the shocks to full stiff and run the rear tire pressure about 5 psi higher than the front. One last thing is that when you go to enter a corner get hard on the brakes just before you turn in so the weight is shifted to the front and it will stick better. The first autocross I went to with my new springs and shocks, I had Intrax and Tokicos, I lost the rear end three times.