Quote:
Originally Posted by 7thgear
well, we can nitpick further and say that roll is a function of geometry..
we could theoretically build a car that does not roll, or rolls with the turn and the springs wouldn't have a thing to do with it.  |
Roll transfers "weight" (momentum forces actually) by the reaction of the springs on the suspension geometry. Reverse roll or zero roll suspension can and has been designed. It fails to work because of sensory limits in the driver. The car would be quicker with reverse roll but undrivable except by a non human computer. Mind you both McLaren and Mercedes Benz are working on computer controlled zero roll or at least minimal roll suspensions but they are not geometry based. They rely on gas and oil springing systems controlled by computers. Williams F1 did the same in the early 90's. That way the geometry still signals to the driver so he can actually avoid cornering so fast the car leaves the road abruptly.
Since suspension geometry on your BRZ is fixed for practical purposes the reduction in roll is effected by increasing total spring rate: tires, bushings, roll bar rates, spring rates, bump stop rates and position and any gas springing effect in the shock absorbers.