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Dorigtt, yes on my irs bug i have narrowed just the torsion tubes and according to my calculations the only difference i have to make is when i mount my heim, instead of mounting it in the middle of the torsion tube so the pivot centerline is the same as the centerline of the stock torsion bars i just move the hiem back 9/16" and it SHOULD retain stock geometry. HOWEVER panelfantastic you say you turned the trailing arm pivot up? hmm is it directly on top of the torsion tube or is it somewhere inbetween that and stock? you might be able to level the bus and measure the angle vertically that it has been changed and "offset" the heim the same angle 9/16". (this is assuming you didn't move the inner trailing arm pivot in just rotated it and narrowed the torsion tube 2") what i am reffering to when i say "offset" is instead of mounting the heim with the pivot centerline in the middle of the torsion tube you "offset" it in my case towards the back of the car 9/16". in your case you will probably end up "offsetting" it from the torsion tube center not back as in my case but up and back the same angle your inner pivot has been turned. hope this helps. let me know. also i have talked to 55superbeetle who has narrowed his torsion housing 2" per side and he said the caster was fine throughout with stock swing arm pivot location but he is going to use a hiem not sure if he's gonna offset it. and out of curiosity do you think it was necessary to rotate the trailing arm pivot like that? i know on mine i think i could go preeetty low before i have to worry about that at all with stock arms.
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