Quote:
Originally Posted by bogart
When the stiffer bar is installed on stock suspension, the weight transfers, and the tire rolls over to positive camber, which causes understeer.
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Like I said above, the stiffer bar actually causes the tire to positive camber during cornering, which is the feeling of understeer.
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great post on a whole.
the above is misleading, though. the roll-reducing quality of swaybars will always serve to maintain negative camber (and reduce positive camber). the understeer in this case is not caused by dynamic positive camber, but by a lack of grip in the outside tire, which has been increasingly loaded by the stiffer swaybar (at the cost of the grip you used to get from the inside tire, which is now unweighted significantly, and generating less grip). this inability of the outside tire to cope with it's increased load is generally due to other suspension components which aren't stiffened to match the swaybar (as you mentioned), lack of static camber, or tires that aren't up to the task.
the most important thing, as bogart said, is to upgrade the whole suspension (right down to the tires) to match. stiff parts and soft parts don't work well together (ahem).