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Has Anyone Offset a Stock Trailing Arm?

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Old Jan 8, 2016 | 03:23 PM
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Default Has Anyone Offset a Stock Trailing Arm?

I have a welding machine and I'm a pretty good fabricator. I was thinking maybe I could just modify my existing trailing arm and save $500.
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Old Jan 8, 2016 | 03:33 PM
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I think racers back in the day would notch their stock trailing arms. The Owens Corning Team comes to mind immediately, or maybe it was shown in the Chevy Power book.

edit: yes there is a picture shown in the old Chevy Power book and short discussion of the modification.

Last edited by 69autoXr; Jan 8, 2016 at 03:44 PM.
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Old Jan 8, 2016 | 04:18 PM
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here's a link to the book
http://www.duntovmotors.com/Corvette...wer%20Book.pdf
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Old Jan 8, 2016 | 04:26 PM
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Thanks I think I could handle that modification.
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Old Jan 8, 2016 | 09:13 PM
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Keep inn mind that the larger the Diameter of the Wheel the less the need for offset arms. Depending on what Wheel and Tire You intend to run You might not need the offset.
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Old Jan 8, 2016 | 09:30 PM
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This is something I've put some thought in on too. Seems like you need to make a jig to mount the arm to. Then cut the arm and weld in the offset.

But like gale banks suggested? I'll be going to larger wheels instead.
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Old Jan 8, 2016 | 10:01 PM
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Test-fit the new wider tire/rim on the car first to see what you actually need to do. Definitely make a jig to keep the pivot point/spindle distance accurate.

(A previous owner used a press to off-set the trailing arms on my project.......I was completely unable to adjust the toe until I re-worked the offset arms )
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Old Jan 9, 2016 | 02:12 PM
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the tire will hit the frame about the same time as it hits the trailing arm.

Look up norvalwilhelm posts, he has a good write-up on how to do it.

link to his post talking about how to do it.

https://www.corvetteforum.com/forums...ling-arms.html

Neal

Last edited by chevymans 77; Jan 9, 2016 at 02:17 PM.
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Old Jan 10, 2016 | 10:18 PM
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I am running 18" wheels and have stock trailing arms.
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Old Jan 10, 2016 | 10:36 PM
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Originally Posted by brent319
I am running 18" wheels and have stock trailing arms.
What is your wheel width? Also, what size tires are you running? Stock ride height?
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Old Jan 11, 2016 | 05:43 PM
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Default A better way?

Originally Posted by Strokemyaxe
This is something I've put some thought in on too. Seems like you need to make a jig to mount the arm to. Then cut the arm and weld in the offset.

But like gale banks suggested? I'll be going to larger wheels instead.
Would it not be better to first weld in the offset, then cut out the original section where the tyre would rub? This way, the attachment points of the arm would not move relative to each other.

Regards from Down Under.

aussiejohn
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Old Jan 11, 2016 | 07:26 PM
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Originally Posted by brent319
I am running 18" wheels and have stock trailing arms.
Me too. I did relocate the e-brake cable but I might not have needed to. Rear wheels are 18' x 9.5" with 5" back space. Tires are 275 wide. Every thing clears, stock ride height.

Last edited by tixeon; Jan 11, 2016 at 07:28 PM.
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Old Jan 12, 2016 | 06:20 PM
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This is what I did to my stock trailing arms:


Steve
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