Stiff suspension? No sway bars?

[blue2000s]

The MP4-12C uses active hydrolic control to replace sway bars. There's no way you can build a traditional suspension that's stiff enough to control body roll but still soft enough to absorb road irregularities so that it maintains contact with the road without sway bars. Not that you'd want to drive on a regular road any way. That is why they exist.

[jaykay]

If you have springs and dampers controlling roll and ride, ride quality will be hurt dramatically; less tire contact with the road; less traction. Usually you want things as compliant as possible (without taking away from other things).

Roll control is best done/dominated by roll control devices...roll bars; or by setting roll centre geometry to minimize the roll moment

Of course other things can be made to work...but I would think think there would be a tight envelope for it.

Active suspension is whole other kettle of fish

[Mrmaddbrad]

I know the McLaren has active suspension. I'm not that ignorant, but its not the first car to have it, but it is one of the first cars to have literally no roll bars.

As i stated before, I don't think its changing ride quality. Lets just throw that whole sentence out cuz thats not what I'm getting out.

But roll bars aren't the only things that reduce body roll... Your shocks, springs, and even you're allignment change body roll. Along with weight distribution, and actually chassi stiffness.

If you made your spring rates stiff enough. And made your shocks soft enough to be able to take impacts to where you don't loose grip or upset the car too strongly. (assuming you don't only race on racetracks. Such as terrible autocross locations....)