I think I read somewhere that the 996tt has the highest torsional rigidity of any production sports car. Is this true? I assume that the more torsionally rigid a car is, the better its handling characteristics.

 

Not sure about the highest of all, but its chassis is 25% more reinforced for rigidity than its counter partner the NA version.

 

I have a reinfoced Mustang, with a welded roll cage and
welded subframe connectors etc, and when I jack one
end up, it flexes more than the 996tt. I have a stiff suspension
in my 996tt, and if I drive onto a speed bump at an angle, the
opposite front wheel lifts off the ground. This chassis is vey
stiff.

 

It's even stiffer if you have no sunroof a la GT2/3

 

You can add the stiffness very easily. Added a TechArt torsion bar between the two shock towers up front. Also added a rear torsion bar in addition to tying the rear shocks together with the roll bar! If I angle down a driveway, the tire will lift.

 

Another way Kevin explained how rigid the car is if you jack the car up from the rear jack point the whole car lifts (front as well). Now THAT is STIFF.

 

chad et al.,

i have a caged 993TT for ORR, and wonder how else to increase chassis stiffness, will a bar between the shock towers help?

 

definately, it'd be smart to do in the rear as chad mentioned also. Just make sure that they use a strong material.

 

watt, you have a fully welded cage in the car. a strut brace will give you minimal, if any, increase in stiffness.