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  #16 (permalink)  
Old 03-01-2009, 02:01 PM
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Quote:
Originally Posted by aosborn
It looks like you have got good info for heim joints, but have you considered re-bushing the stock trailing arms with poly-graphite or polyurethane? The toe adjusters already have non-deflection ball ends, and you could re-bush the camber arms also. It would save you a ton of bucks! I have installed Herb Adams camber arms, they are strong, lower the roll center, and not to pricey if memory serves. The stock components are quite strong and light, just the rubber bushings are too compliant.

Andy
The theory behind this rear suspension is to eliminate all the bushings for stiffer and better handling.

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  #17 (permalink)  
Old 03-01-2009, 05:08 PM
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[QUOTE=Jsup]The theory behind this rear suspension is to eliminate all the bushings for stiffer and better handling.

While the benefit of heim joints is well documented, if the car will be mainly for street use heims are particularly vulnerable to water and dirt. In an environment like that they will not last long before they either sieze, or develop slop. Dust shields are available, but they are not fool proof either.

Just something to consider...
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Old 03-01-2009, 07:51 PM
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[QUOTE=aosborn]
Quote:
Originally Posted by Jsup
The theory behind this rear suspension is to eliminate all the bushings for stiffer and better handling.

While the benefit of heim joints is well documented, if the car will be mainly for street use heims are particularly vulnerable to water and dirt. In an environment like that they will not last long before they either sieze, or develop slop. Dust shields are available, but they are not fool proof either.

Just something to consider...
Thanks man, great advice. This is a car I drive on sunny days in the spring, summer, and fall under 1000 miles a year. Do you think I will have a problem annually?

Last edited by Jsup; 03-01-2009 at 08:08 PM.
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Old 03-01-2009, 08:19 PM
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[QUOTE=Jsup]
Quote:
Originally Posted by aosborn

Thanks man, great advice. This is a car I drive on sunny days in the spring, summer, and fall under 1000 miles a year. Do you think I will have a problem annually?
Just keep an eye on things...
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Old 03-01-2009, 08:39 PM
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I would go with 3/4 x 3/4 chromoly with a rating 25000psi or higher for the main four links(8 heims total) I stole those calculations from the 4 link I just designed for my Firebird. Lateral support bars can use 5/8" with a Yield strength above 20,000psi. These are roughed out calculations on the side of caution. The safety factor is around/above 2 which is good for suspension components. For the rear sway bar just make the heims 2 times the torsional yield strength of the sway bar. (I can calculate that if you give me the OD, ID,material and length of the bar.

What tubing are you using for your links?
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Old 03-01-2009, 09:00 PM
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Originally Posted by mechEcwru
I would go with 3/4 x 3/4 chromoly with a rating 25000psi or higher for the main four links(8 heims total) I stole those calculations from the 4 link I just designed for my Firebird. Lateral support bars can use 5/8" with a Yield strength above 20,000psi. These are roughed out calculations on the side of caution. The safety factor is around/above 2 which is good for suspension components. For the rear sway bar just make the heims 2 times the torsional yield strength of the sway bar. (I can calculate that if you give me the OD, ID,material and length of the bar.

What tubing are you using for your links?
The rods are aluminum. See post 16 for a direct reference. Thanks.
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