I got some new torsion bars and spring plate bushings installed on the S today. Rebel Racing parts. 29mm bars to replace the 27mm ones. Should help cure the push in the turns. Already I can tell the ride is much more level, less pitching and bouncing.
I had to do a bunch of trig and some other math to figure out what the new spring plate setting should be. We didn't measure the angle with the car on the ground because we hadn't planned on doing the bars. So we had Clint's mom's 911 as a reference for ride height but it was lower than mine, so had to correct for that, plus the driveway sloped 2.4 degrees and my car was on jack stands. Also, his mother's car was pointed down the driveway but mine was up the driveway. We had the free-hanging angle on my car but it was a bit of mental gymnastics to get the amount of twist in the bar at static ride height. From there it was a simple 27^4/29^4 to get the new displacement, then convert back to what the angle-finder should read in the driveway.
It worked, so I was happy.
It was a bit of an ordeal to get the driver side bar to the correct angle, though. For some reason the 1 inner spline forward + 1 outer spline back didn't seem to give us the advertised 0.8 degrees every time.
The ride height looks good, though. And we found that the sides were indexed differently so we set them equal. The corner balance should be better but it needs to go to the scales soon. Also needs to have the alignment checked. We did pretty well by eye, judging by the drive home.