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[feeutfo]

?
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[Liam]

Interesting - looking at that thread then reading into it further, looks like you can get aftermarket eccentric rear trailing arm bushes (for pontic GTO or Holden Commodore but will fit Omega) that allow for extra camber adjustment, especially for lowered cars. Might be just what the OP is after, assuming he can fit the right bits to his calibra.

[Boditza]

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The shocks and springs are not because it isn't much to explode

[vexorg]

You do get eccentric bushes for the calibra too, however, if you drop the body by say 40mm, then youd need 40mm at the pivot point to maintain the camber. That's bigger than the bush.

How does the hub part pivot?

[feeutfo]

Interesting - looking at that thread then reading into it further, looks like you can get aftermarket eccentric rear trailing arm bushes (for pontic GTO or Holden Commodore but will fit Omega) that allow for extra camber adjustment, especially for lowered cars. Might be just what the OP is after, assuming he can fit the right bits to his calibra.

Ooh now, seem to remember one of Tonys lads at wim bemoaning camber adjustable bushes. Might ask Tony to comment, see if he's had any dealings with them.

[Liam]

You do get eccentric bushes for the calibra too, however, if you drop the body by say 40mm, then youd need 40mm at the pivot point to maintain the camber. That's bigger than the bush.

Er, doesn't work like that :-? Dropping 40mm will put probably an unwanted degree or so of camber on. That could be taken out by a trailing arm bush with only a few mm of eccentricity.

[vexorg]

Er, doesn't work like that :-? Dropping 40mm will put probably an unwanted degree or so of camber on. That could be taken out by a trailing arm bush with only a few mm of eccentricity.

I thought that at first, but having fitted them to another car, there just wasn't the range.

The trailing arm is a fixed unit to the hub, for the camber to remain the same then the angle of the arm also must remain the same, and the pivot point will still be at the same height relative to the ground. Or is my logic wrong there?

[Liam]

The idea of the eccentric bushes is not to restore your trailing arm pivot points back to where they were (relative to the ground) before the lowering, and hence get your trailing arm to the original angle. That would work, but of course as you realise is impossible - to really do that you'd need to raise all your suspension pivots the same amount you were lowering the car!

What these eccentric bushes are actually doing is allowing you to tilt the trailing arm and directly adjust the camber. Depending on the kit you get (various seem to be available), you might just replace the outer bush with an eccentric allowing you to move the outer pivot downwards, or you might replace both outer and inner bushes, in which case you'd move the outer pivot downwards and the inner pivot upwards to get even more camber adjustment (how much you could actually do the latter would depend on how much spare space there is in the bracket between the inner end of the trailing arm and the subframe itself). In either case you are essentially tilting the axis of the trailing arm directly altering the camber. The eccentricity would only be of the order of a few mm to allow you to loose the extra camber you've gained from lowering.

[2woody]

don't forget - eccentric bushes not compatible with the extra camber-toe adjusting bar.

[Liam]

I would have thought, at least in principle, you should be OK just replacing the outer bush with an eccentric and keeping the compliant inner bush that allows the toe control bar to do its thing. Have stiff eccentric bushes both inner and outer, and the suspension will probably bind up. In fact in some of the threads i was reading, GTO owners were reporting having removed the toe-control bar all together after fitting eccentric bushes to correct camber. I suppose they'll be more likely to end up pointing backwards on the road, but i guess no more than in a car that has 'normal' semi-trailing arms without the extra toe-bar in the first place.

Going back to the OP's plan, I think we can probably conclude that if correcting excessive camber due to lowering is your intention, trying to incorporate the omega's toe-control bar into your rear suspension isn't going to help. Eccentric trailing arm bushes, on the other hand, seem to be available for exactly that application and should help if you understand what they are doing and install them correctly i.e. outer pivot down and inner pivot up.