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| Tubular Upper Control Arm Q https://slantsix.org/forum/viewtopic.php?t=32261 |
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| Author: | slantzilla [ Tue Nov 18, 2008 1:55 pm ] |
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Have you tried pulling the short side forward with the strut rod? 5/8" is quite a difference on a street car. |
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| Author: | wjajr [ Tue Nov 18, 2008 5:56 pm ] |
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Slantzilla, I have not tried to force the LCA forward by tightening the strut rod. Won't that rase hell with the lower control arm bushing by pulling it off of the torsion bar centerline or, is this SOP for cranky "A" bodies? FM gives 40 ft lbs for that rod, I don't recall if I torqued it to 40 or not. |
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| Author: | slantzilla [ Thu Nov 20, 2008 1:54 pm ] |
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I would measure the strut rods to make sure they are aboot the same length. It is possible a bushing didn't seat properly when you tightened the struts. In my little pea brain 5/8" is quite a bit of difference for there not supposed to be anything wrong. Drag racers will set the wheelbase diffrent from side to side to get more roll-out in the beams, but I bet you did not intentionally do that. |
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| Author: | tophat [ Thu Nov 20, 2008 4:07 pm ] |
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5/8 is a lot. As said, check the bushings in the front end, make sure they are seated properly. Is it possible that when the frame repairs were welded in, that they were not straight? If it is possible that they were not straight, then the tubular arms may be your only choice, short of a frame machine. Caster angle will change the wheel base a tiny bit, but not 5/8". Remember changing caster is moving the upper ball joint forward or backwards relative to the lower ball joint. If your thrust is off a whole degree that is a lot too. Typically, you want to see no more then half that. Check the bushings in the ends of your rear leaf springs to start. It sounds like it might be a good idea to think of taking it to a collision shop to have the unibody checked for straightness and squareness. I still am pretty sure that the tubular arm will give you all the adjustment you will need, and may very well mask a slightly out of square condition satisfactorily. TopHat |
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| Author: | Joshie225 [ Thu Nov 20, 2008 4:31 pm ] |
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I second the suggestion to measure strut rod length. The length varies a bit between years and the way you said the car was put together with two different sized torsion bars I wouldn't be at all surprised if you had two different length strut rods. |
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