C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Upper Control Arm Differences

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Old Feb 17, 2012 | 06:50 PM
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Default Upper Control Arm Differences

I searched the archives but couldn’t find anything regarding this.
I read in another post that it might be possible to gain additional negative camber by combining early upper A-Arms with late lower A-Arms.

I s there any difference in length of say 84-87 upper arms compared to 88-96 upper arms?

Quick search on Mid Americas website indicated the same part number for 84-96
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Old Feb 17, 2012 | 06:54 PM
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Only thing I know of is the offset lower buxhings and trimming the concentric washers.
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Old Feb 17, 2012 | 06:56 PM
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I'll going with these when my arms wear out....
What year is your car?
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Old Feb 17, 2012 | 07:09 PM
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The offset lower bushings are going in this weekend.

It’s a 90 and my upper A-arms still have the shims in place. Not a chance in removing them as the passenger side is already up against the header (stainless works)
If by chance the early upper A-arms are shorter it would go a long way to helping my camber issue.

Ive looked at the SPC arms in the past and if at all possible id like to stay factory
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Old Feb 17, 2012 | 07:47 PM
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Im pretty sure the early uppers are like an inch shorter. I too have a '90 and have not confirmed it, but I believe they are different. The lowers are also shorter resulting in the narrower track width of the early models.

I ended up making my own adjustable control arms.
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Old Feb 17, 2012 | 09:01 PM
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Originally Posted by Coupe89

I'll going with these when my arms wear out....
What year is your car?
They are great, no poly bushing "squeaky sounds"
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Old Feb 18, 2012 | 12:40 PM
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Originally Posted by Coupe89

I'll going with these when my arms wear out....
What year is your car?
I don't have enough points to put these on and stay in class.
I drool everytime someone posts these though
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Old Feb 18, 2012 | 10:05 PM
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Uppers lowers and spindles are all different.
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