Auto-X street - no rear sway

j-rho

The general guideline docs are based off the standard cause:effect relationships in tuning. However in some cases second-order effects can trump the primary effect.

In general stiffening a front swaybar will make a car understeer more. However, in the case of a car with poor front static and dynamic geometry (camber) - it can have the opposite effect. If the stiff bar keeps the car from rolling as much, it may mean the car loses less camber and the outside front tire has a happier resulting contact patch at terminal roll. Net result, the car may push less even though that outside front tire is being asked to do more via the primary effect of the swaybar.

I call this the Subaru effect because they all have crummy front geometry but the Z exhibits it also due to insufficient front camber. In my (admittedly limited) experience the car pushed less and less the bigger I went in front bar - with the other benefits of less inside wheelspin and better transitional (slalom) behavior.

Really wouldn't recommend pulling the rear bar on a stock car. The car is already so soft, eliminating a bunch of roll stiffness is going to make it worse, and worsen the resulting geometry in front.