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Unable to set negative camber?

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Old Mar 15, 2005 | 05:30 PM
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Question Unable to set negative camber?

Has this ever happened to anyone? I had my car in a fairly reputable shop today and had them check the alignment. Camber was positive, so I asked them to crank it around -0.5 to -1.0. After an hour of working on it, they come back to me and say the best they could do is +0.5 on one side and +0.1 on the other! I've never heard of such a thing, has anyone else???

The car is basically stock ('00 SS).

If this is the case, I guess I'll have to find a way to move the top strut mounts.
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Old Mar 15, 2005 | 08:09 PM
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Originally Posted by Fran D
The car is basically stock ('00 SS).
Car is at stock ride height, I assume.

Have you hit or run over anything?
Did they check Camber sweep?
That would indicate a bent knuckle.

At stock ride height, one doesn't get a lot of camber, but I would think you could get it to zero, anyway.

Leave the tops alone. If you want more camber, slot the lower A-Arm attachment points about 1/8" in order to slide the lower out, more. Easier and a LOT safer ....
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Old Mar 15, 2005 | 08:35 PM
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Originally Posted by mitchntx
Car is at stock ride height, I assume.
Yep.

Have you hit or run over anything?
Not that I know of, but the tech did mention that the crossmember seemed 'bent'. Now, I do remember seeing some depressions due to jacking the car from that point (...it amazed me that it would make any mark at all), but could it have caused something like this?

Did they check Camber sweep?
That would indicate a bent knuckle.
I don't have the full lock-to-lock trace, but the total cross camber excursion was -0.1 degree. I don't think that's enough to be indicative of any link damage, is it?

At stock ride height, one doesn't get a lot of camber, but I would think you could get it to zero, anyway.
Yes, I'd expect the same thing.

Leave the tops alone. If you want more camber, slot the lower A-Arm attachment points about 1/8" in order to slide the lower out, more. Easier and a LOT safer ....
That's a very good idea...cheaper, too! Thanks.
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Old Mar 15, 2005 | 08:46 PM
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Originally Posted by Fran D
Has this ever happened to anyone? I had my car in a fairly reputable shop today and had them check the alignment. Camber was positive, so I asked them to crank it around -0.5 to -1.0. After an hour of working on it, they come back to me and say the best they could do is +0.5 on one side and +0.1 on the other! I've never heard of such a thing, has anyone else???

The car is basically stock ('00 SS).

If this is the case, I guess I'll have to find a way to move the top strut mounts.
The camber is adjusted by slideing the lower control arm now if its frozen because of rust or bad weather good luck trying to get it to move.Their is a tool to make camber & caster adjustments some people try useing the weight of the car and prying to get these adj. this way sucks.If your control arm is not frozen you should be able to get -camber, factory specs for fbodys is + 0.4 camber I dont know why but it seems to high.
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Old Mar 16, 2005 | 07:45 AM
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Originally Posted by DravenMyers
The camber is adjusted by slideing the lower control arm now if its frozen because of rust or bad weather good luck trying to get it to move...
That was not the case.
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Old Mar 16, 2005 | 07:53 AM
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Originally Posted by mitchntx
Car is at stock ride height, I assume...
Getting back to this point, some searching on this forum and others seems to suggest that, without any other modifications, lowering springs may reduce the camber. Looking at a undimensioned drawing of the front suspension I think I can understand how this could be the case, but without knowing the actual control arm lengths it's difficult to determine what the impact could be.

I have wanted to lower the car for some time. Not only to lower the CG, but mostly to remove ~48 square inches of air from underneath the car. Maybe it's time?
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Old Mar 16, 2005 | 09:14 AM
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The upper A-Arm is significantly shorter than the lower ... less than 1/2 the length.

However, from the centerline of the car, the upper attaching points are slightly further apart than the lowers.
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Old Mar 16, 2005 | 09:59 AM
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Originally Posted by mitchntx
The upper A-Arm is significantly shorter than the lower ... less than 1/2 the length.
That may be good enough to estimate the change in camber. It can be done ratiometrically. Thanks.

Another question I have, though, is further investigation of this topic implies that lowering all around results in a suboptimal rear LCA geometry. Some have advocated relocating the LCA mounts to recover this geometry. Any experience with this?
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