I was wondering about how to increase body roll. Lowering the suspensioncompdamp value helped somewhat with some of the cars, but others seem hardly affected by it, if at all. Could that be a result of it being modded?
Cars in vanilla GTA have so much body roll because of low suspension force combined with high tire grip (lots of lateral Gs). Low suspension force reduces the effect of the road surface on car handling and also causes the "curb hopping" problem where cars dont react to bumps/curbs at all. You could raise the center of mass in order to increase body roll but the car handling is very sensitive to that. everything is affected by center of mass. stability, understeer, cornering speed, braking, wheelspin... center of mass is the least flexible parameter.