T-Bar = Spring Rate Chart?
 

Anybody have a link or knowledge of what T-Bar equates the equivalant spring rate? Not wanting to "spring" for a front coilover setup just yet, wanted to make sure i put the right t-bar (hollow most likely) in place. Still working on what the right rate is, but would like to know there is a chart that i can refererence.

torsion bar size ( mm) - spring rate ( lb/in)
23 - 100
24 - 120
24.1 - 122
25 - 140
26 - 165
27 - 191
28 - 221
29 - 254
30 - 291
31 - 332
32 - 377
33 - 427

from: http://tech.rennlist.com/911/pdf/settings.pdf