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flosho

Like the title states. I just installed a 19mm rear sway bar via chrenan's DIY mount style. Now my driver's side tire rubs?? It didn't before today.

Could this because by the sway bar eccentric bolt that I swapped out for the original?
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ideola · Joined: 01 Oct 2004 Posts: 15550 Location: Spring Lake MI

Rubs where

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flosho · Posted: Thu Jul 02, 2009 10:28 am Post subject:

At the top of the wheel on the outside.

It did this right when I put the 17's on (255s in the rear). I rolled/pounded the fenders out and it didn't rub at all, did the track event this weekend so that proves they didnt rub.

I put the rear sway bar on today. Took it for a drive and now the driver side rubs. So it has to be the eccentric bolt that caused this as that's the only thing I had to remove/add.

I just don't know which way I have to turn it to get the adjustment or what exactly it does.
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flosho · Posted: Thu Jul 02, 2009 10:35 am Post subject:

Doing some searching, I must have put some positive camber back into the driver side wheel by mistake. The bolt that holds the rear drop links also adjusts the rear camber?

It's a PITA to adjust with a spanner wrench so it'll have to wait til I get the proper sized open ended wrench
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Chrenan · Joined: 15 Jan 2003 Posts: 3903 Location: Canada

Sounds like that's what must of happened. Seems strange, but not totally out of the question. And, before you ask, yes I will cover the cost of your damaged tire since it was my writeup you followed.

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flosho · Posted: Fri Jul 03, 2009 10:33 am Post subject:

Can anyone explain exactly how I should adjust it?

Loosen the 19mm nut on the outside of the car then use the wrench (1-1/8") to turn the eccentric, but what way do i turn it to increase negative camber?

Obviously there's only so much adjustment but I'd rather not have to keep monkeying with it if I know which way to turn it.
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Smoothie · Posted: Fri Jul 03, 2009 1:42 pm Post subject:

Ja, the left side's the one that'll rub if any..
It's due to a manufacturing quirk with all 924s that leaves a few mm less space (approx. 10mm?) for the tire at the left as compared to the right.
Mine rubbed in the rear left with Fuchs 5-spokes (their different offset leaves the tires sitting about 17mm further outboard than the OE flat wheels do).
I have my rear camber set correctly (-1 degrees as I recall), and they'd still rub with the Fuchs if I didn't change the wheel spacing at rear-left. For the Fuchs (w/spring-summer-fall tires) I remove the OE spacer and replace it with (2) 1/4" spacers for a total of 1/2" spacing. I think the OE spacer is a bit over 3/4", maybe 7/8"..? Anyway, with the lessened spacing, the wheel bolts are too long - but instead of dealing with them, I just put the OE soft metal lugnuts on, tightened down and let the bolt ends pop through the ends of the nuts. Just a small piece at the end of each nut was popped out the same size as the diameter of the bolt. Then removed each of those lug nuts and prettied-up the holes with a drill-mounted chamfering(countersinking) bit.

I don't remember the details of camber adjusting off the top o'my head, but I do know that camber, toe and height settings in the rear are interrelated - change one, and you have to re-check the other two.
A camber gauge would be handy, but if you don't have one, a good spirit level and a framing square can suffice - http://www.924board.org/viewtopic.php?t=14672
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Smoothie · Posted: Fri Jul 03, 2009 1:49 pm Post subject:

<Click> to see pic comments -

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"..it's made in Germany. You know the Germans always make good stuff."

'82 924T, US version, dark green metallic, 5 speed Audi 016G gearbox

flosho · Posted: Fri Jul 03, 2009 2:46 pm Post subject:

Smoothie.. I noticed/knew that the driver side/left side pokes out a bit further, but prior to installing the sway bar it didn't rub, especially since I pounded/rolled the fender to fit the tires.

However while installing the new eccentric I noticed it(trailing arm) moved ever so slightly when I put the new bolt in so I'm sure I can adjust it to fit without rubbing.
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Smoothie · Posted: Fri Jul 03, 2009 3:33 pm Post subject:

What about this scenario -
Your left rear ride height was/is higher than the right, enough that the left didn't rub before. Now with the bar installed, it's pulling down the left side, and pushing up the right...
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"..it's made in Germany. You know the Germans always make good stuff."

'82 924T, US version, dark green metallic, 5 speed Audi 016G gearbox

924RACR · Posted: Fri Jul 03, 2009 9:42 pm Post subject:

More likely the positive camber causes a rub.

I have the same offset problem on my racecar, but always thought it was due to hitting stuff with the rear!

Correct wrench size is 27mm for that. You'll also need a 24mm wrench to hold the toe eccentric, since that can and will also move when you adjust the camber.

If you move the wheel up relative to the spring plate, that'll give more negative camber; moving it down (when the car's in the air, only way to make the adjustment) it'll have more positive camber.

You kinda also need a camber gauge to measure that stuff. Factory setting for the rear is 1 deg negative camber (wheels tilted in to the body).
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flosho · Posted: Fri Jul 03, 2009 10:52 pm Post subject:

Well, I'm hoping to attempt to get it driveable without rubbing then take it in to get 4 wheel alignment, since I want more neg camber in the front as well.
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