|Sway Bar Refesher... (archive)|
Posted by Karl Seeger on September 28, 1998 at 13:57:59:
In Reply to: Ok,so let me get this straight posted by TBell on September 28, 1998 at 12:54:44:
Now your making me think!?
Sway bars don't reduce body roll. Springs do. They TIE the left and right supension TOGETHER so they work more as an unit. Ulrich noted that with the front "stiff" he felt more road inperfections. He should! He is feeling what BOTH sides are feeling. If I hit a chuck hole with the left tire I will feel it as well on the right side, disrupting my ballance. It reduces the "indepenance" of the left side vrs the right.
The way I remember how to set them is depending on the bar (front or rear) the inside hole is "stiffer" (shorter bar...) and decreasses the slip angle on that end, increassing an action (understeer or oversteer).
Front bar, increase understeer (stiff), decrease understeer (loose).
Rear bar, increase oversteer (stiff), decrease oversteer (loose).
So why don't I use both bars set at "stiff". Remember the bar ties in both sides of the car together. 1.9 Z3's have open differentals. If I tie both ends together too tight I will lift a rear wheel in a tight turn and my traction go'es to zero! Not the fastest way around a track.
It also takes the "independance" out of the system. Indepenance is a good thing, in moderation which is what sway bars control.
Yes, I "push" at the track but with the supercharger I can change my handling to oversteer in a flash so understeer with a graceful push of the throttle will correct my problem and not make me "swap ends". The car "walks" to the exit (under increassing throttle, to full) and I'm on my way to the next turn.
To reduce body roll you MUST re-spring your car. To "tune" the roll and handling you'ed be hard pressed to beat sway bars. We have it even better, we can adjust BOTH. Most cars only allow adjustment on one end, front or rear.