SPC lower control arms question - Chevelle Tech
Brakes, Suspension & Steering Conversion questions & more.

 
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post #1 of 6 (permalink) Old Jul 5th, 16, 8:22 PM Thread Starter
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SPC lower control arms question

To "convert" SPC lower control arms for coil-over use, you insert this plate between the shock mount and the arm cup. They say it's to strengthen the mounting point.

It is sandwiched between the shock and the arm, it doesn't bolt to the arm in any way. It's simply a spacer that can't add any strength to anything.

Am I missing something here?
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post #2 of 6 (permalink) Old Jul 5th, 16, 9:02 PM
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Re: SPC lower control arms question

It's a load spreader and re-inforcement. All the load is trying to push the bottom mount out through the bottom of the A-arm. Same bolts that hold the shock also locate the plate. IMO a very simple and effective deal.

We used to make these out of 5/16" plate when we were racing Chevelles on 3/8 and 1/2 mile dirt tracks. Ours were made with a cutting torch, not nearly as pretty.

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post #3 of 6 (permalink) Old Jul 5th, 16, 9:48 PM Thread Starter
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Re: SPC lower control arms question

[QUOTE=Tom Mobley;9016354All the load is trying to push the bottom mount out through the bottom of the A-arm.[/QUOTE]

THAT makes a lot of sense. I wasn't thinking that the shock mount point was ALWAYS being pushed, regardless of suspension movement.

Thanks!
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post #4 of 6 (permalink) Old Jul 5th, 16, 10:31 PM Thread Starter
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Re: SPC lower control arms question

I'm debating between these arms and the CTA42H arms from Global West. GW has the advantage with Delrin bushings, a way nice included sway bar link, included better bump bushing and the shock plate is already thick enough for coil-overs. BUT they're $200 more than the SPC.
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post #5 of 6 (permalink) Old Jul 6th, 16, 12:39 PM
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If going coilover, I like the Ridetech lower arm better as it eliminates the bolted bottom for a shear bearing for better articulation.
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post #6 of 6 (permalink) Old Jul 7th, 16, 12:12 AM Thread Starter
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Re: SPC lower control arms question

Quote:
Originally Posted by analyte View Post
If going coilover, I like the Ridetech lower arm better as it eliminates the bolted bottom for a shear bearing for better articulation.
Very interesting. Adding it to the list. Thanks!

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