Negative camber

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lmandb

Negative camber

Post by lmandb »

Hi, Just replaced the ball joints, bushings and removed one coil from the springs. Assembled everything back together and now I have what seems like excessive negative camber. There are no shims on the lower a-arm bolts so how do I get it back to specs? Any Ideas? What could I have done tp create this problem? Can't find this on the forum, anyone had this problem....
redcars
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Posts: 487
Joined: Sat Jul 31, 2010 9:36 pm
Your car is a: 1981 Spider 2000
Location: Collinsville, IL

Re: Negative camber

Post by redcars »

I just did the same thing with my 82 spider and ended up with a little positive camber. There is a little play with the bolts for the ball joints. You could try loosing them and moving the bottom in and the top out to help as much as possible. Other than that I don't know what could have caused your problem.
1987 Lotus Super 7 clone
1981 Fiat Spider 2000 AT
1982 Fiat Spider 2000 5sd
1970 Fiat Coupe
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kmead
Posts: 1069
Joined: Sat Aug 02, 2008 9:24 pm
Your car is a: 1969 850 SC 1970 124 SC 85 X19
Location: Grand Rapids, MI

Re: Negative camber

Post by kmead »

Some negative camber is fine, excessive camber is a problem.

Not to be insulting or cast aspersions, positive camber is when the top of the tire is further out than the bottom of the tire and negative is the opposite (top in, bottom out).

A half degree is an acceptable amount for a street driven car.

One can chase some of it out by loosening the ball joint bolts to the A arms and move the upper one out and the lower one in. If you still can't get to where you could redrill the holes in the ball joints to move the ball joints relative to the end of the A arm, the same could be done with the a arms (which I would not want to do).

If your car is suffering from rust in the shock/spring mount area the upper arm can begin to move inward creating negative camber. The constant pounding of bumps and so on can make the tower area bend in towards the engine, it doesn't take much to cause this.
Karl

1969 Fiat 850 Sports Coupe
1970 Fiat 124 Sports Coupe
1985 Bertone X1/9
mdrburchette
Posts: 5754
Joined: Wed Jan 25, 2006 5:49 am
Your car is a: 1972 Fiat 124 Sport
Location: Winston-Salem, NC

Re: Negative camber

Post by mdrburchette »

I had the same problem when I replaced the bushings and ball joints on my 71 but it wasn't too excessive so I'm leaving it alone. On my 78 Lemons racer, it was so bad my husband took the lower control arm, cut it and rewelded back together to create less camber. That's going a bit extreme, I know.
1972 124 Spider (Don)
1971 124 Spider (Juan)
1986 Bertone X19 (Blue)
1978 124 Spider Lemons racer
1974 X19 SCCA racer (Paul)
2012 500 Prima Edizione #19 (Mini Rossa)
Ever changing count of parts cars....It's a disease!
lmandb

Re: Negative camber

Post by lmandb »

I think I just found some of the problem. I appears that there are flat washers on the studs that hold the A-arm to the frame. The drivers side has 2 washers on each bolt, the pass side has one on each bolt, this is where the shims go to adjust the alignment. Is there any problem with removing these flat washers to pull the A-arm in to reduce the negative camber? I think I will remove them and see where it puts the adjustment.
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v6spider
Posts: 1035
Joined: Tue Feb 28, 2006 6:57 pm
Your car is a: 4.3L V6 Powered 1972 124 FIAT Spider
Location: Mount Vernon WA

Re: Negative camber

Post by v6spider »

- .5° camber to -1° is ideal...
Rob
http://www.v6spider.com
4.3L V6 Powered 1972 124 FIAT Spider
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kmead
Posts: 1069
Joined: Sat Aug 02, 2008 9:24 pm
Your car is a: 1969 850 SC 1970 124 SC 85 X19
Location: Grand Rapids, MI

Re: Negative camber

Post by kmead »

lmandb wrote:I think I just found some of the problem. I appears that there are flat washers on the studs that hold the A-arm to the frame. The drivers side has 2 washers on each bolt, the pass side has one on each bolt, this is where the shims go to adjust the alignment. Is there any problem with removing these flat washers to pull the A-arm in to reduce the negative camber? I think I will remove them and see where it puts the adjustment.
Having at least one washer in the is likely neccessary.

Also keep in mind that the lower arm adjustments are also how caster is adjusted on theses cars.
Karl

1969 Fiat 850 Sports Coupe
1970 Fiat 124 Sports Coupe
1985 Bertone X1/9
lmandb

Re: Negative camber

Post by lmandb »

Thanks for all the info. Removing the washers on the pass side brought the wheel to 0 degrees, with an alignment for the caster (adding a shim or two) it will most certainly push it out to -1 camber. The drivers side is well within limits. Also I noticed in the manual it shows shims in the diagram on the center cross member where it bolts to the frame rails. I don't have any there but it sure could change the basic settings if you were not aware of that possibility. I will post the results after I get it aligned. Thanks much... :D
lmandb

Re: Negative camber

Post by lmandb »

Took the Fiat in for the alignment. Came right into specs. The washers that were on the studs had to be from the factory, they had millimeter markings on them. Also it appears you can spread the frame rails by putting shims in the top cross member bolt. Although my Fiat did not have any the factory manual shows them in the schematics. Thanks for your responses. It took awhile but got it figured out.
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