Torsion Bars... Best Diameter for a Lowered Street / Autocross car?

this is a great thread on this topic. I too was looking into learnings on the TBar and how to tune. I have 1.03" TBars on my demon that started as a /6 but now has a BB. Having come from the world of auto-x and track, the demon is a big step down from my little RSX in terms of handling. Trying to get something that would at least hang with my little RSX on curves