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Old 09-28-2008, 06:40 AM
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Leaf Springs Shackle plates.

I am fabricating some rear leaf spring hangers and not quite sure of the loads induced on the shackle plates. Seems like the side loading when cornering could be quite substantial.

I was thinking they should be as short as possible (i.e. just long enough to allow for the back and forth movement of the eye) and maybe 1/4 or 3/8 thick, mild steel.

The hangers I have looked at on production cars use thinner material but have angles built into them. Mine will be flat. Speedway sells some that are 5/16 but aluminum which seemed a little weak to me. Vehicle weight is approx. 3000#. Anyone have any advice?

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Old 09-28-2008, 08:22 AM
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Herb Adams VSE used to sell shackles that were 2" longer than stock for Camaros, Firebirds, and Novas. I think mine are 5/16" thick, and they definitely are steel. They're quite a bit more meaty than the skinny ones with multiple holes that most people end up using. They're rectangular, with the ends not quite reaching the top & bottom of the bushings, but they didn't seem to affect the handling of the car at all, they just fixed the famous GM leaf spring sag. If I had had to make my own, I'd have cut them to cover the bushings completely, but if H.A. didn't think it was necessary, it probably doesn't matter.
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Old 10-01-2008, 06:06 AM
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You can also weld a piece of tubing in the middle of the shackles to strengthen the side loading like I've seen alot of guys do.They sorta look like I-Beams when you get done.
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