Quote: Just curious, but if torsion bar systems are so great, how come they aren't used anymore?
they are, just on 4wd IFS trucks.....
Expensive... Parts and labor to assemble.
The double A-arm with coil spring center isn't really used much any more either. Although it's used it most forms of racing with outboard spring/shocks.
Torsion bars were used on Porsche 911's until like the 90's.
Torsion bars are used in Sprint car racing currently.
