Aluminum Leaf-Spring Eye Bushings - Team Camaro Tech
Brakes, Suspension & Steering Conversion questions, Steering & Handling

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post #1 of 18 (permalink) Old Oct 25th, 01, 03:36 PM Thread Starter
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I am thinking of changind the bushings in my multileafs, I've heard of these aluminum bushings made by competition engineering, they sound good, does anyone have any experience with these? heres a pic
http://www.musiccityrodshop.com/cen2022.jpg
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post #2 of 18 (permalink) Old Oct 25th, 01, 05:51 PM
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If you put those in the front spring eyes, your car will ride like there is no rear suspension.
I have bronze solid bushed Guldstrand springs in my Camaro now and am taking them out.
It is especially bad on concrete highways with the tar expansion strips.
I can't keep the rear view mirror in position!
David

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post #3 of 18 (permalink) Old Oct 25th, 01, 06:52 PM Thread Starter
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Okay, thats what I thought, what about the polygraphite/urethane bushings, like the front-end bushings will these Squeak Squeak?? I dont want to lube them or oil them periodically. Basically I am looking to rebuild the springs with the best components.
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post #4 of 18 (permalink) Old Oct 26th, 01, 03:48 AM
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I would suggest Global West del-a-lum. You get the benfits of no deflection AND no stiction.

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post #5 of 18 (permalink) Old Oct 26th, 01, 07:07 AM
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Do the Global West bushings squeak? I'm running polygraphites in my car and it rides harsh like David said and they squeak like a herd of mice. I was planning on yanking them and going back to stock rubber this winter.

I kinda like the idea of using rubber in the front of the leaf spring and something better in the rear as David suggested. Anyone try this?

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post #6 of 18 (permalink) Old Oct 26th, 01, 08:19 AM
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Chicane67 has mentioned using a spherical bearing in the front spring eye with good results.
It's hard for me to believe that they work that well on bumps that "thump".
What works for one guy, would drive another guy nuts.

My solid bushings were pretty good on a smooth road but you could feel each and every phothole, tarstrip bump like someone hit your seat with a sledgehammer!

As far as Polly, I don't know. There is "stiction" but there is very little rotation of the spring to cause that problem. They would be stiffer than the rubber but I don't know about the ride qualities.
It seems someone posted here about them being kinda rough riding?
I think a stock bushing with a polly insert on the front and rear sides of the bushing would be neat.
Take a rubber bushing and drill one or two holes ahead and behind of the bushing and instert polly or plastic rods.
This would leave up-down stock, fore-aft stiffer.
David

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[This message has been edited by davidpozzi (edited 10-26-2001).]
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post #7 of 18 (permalink) Old Oct 26th, 01, 10:33 AM
 
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The Global West bushings have a grease fitting so you can lube them up so they stay quiet. I have a set on my car and am impressed
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post #8 of 18 (permalink) Old Oct 28th, 01, 02:48 AM
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I want to fabricate bushings like the Global west Del a lum.
I think you could get the advantages of both worlds.
One part Alu => No deflection, perhaps not so hard like bronze.
Second part => A Delrin insert in the Alu part. Delrin is a polymer and I hope the vibration is dampened by a very small amount of deflection. Delrin has similar attributes like Teflon (PTFE) => No squeak

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post #9 of 18 (permalink) Old Oct 28th, 01, 06:15 AM Thread Starter
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So from what I gather so far:

- Aluminum/Bronze: rough ride, too stiff
- Poly: Squeak Squeak Squeak
- Global West: $192, not cost effective

So how about good rubber bushings, who makes the best ones, GM, MOOG, ACME ??
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post #10 of 18 (permalink) Old Oct 28th, 01, 06:40 AM
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yellowcar 72,
How is the ride with those bushings?

Markus,
Check out Thompson Nyliner bushing inserts. Those are what is used in the GW front bushings. I haven't seen the rear bushings.
It might be possible to use a smaller OD rubber bushing from another car and make up a spacer for the Camaro spring eye.
David

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67 RS 327
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65 Lola T-70 Chev 350 Can-Am Vintage Racer

[This message has been edited by davidpozzi (edited 10-28-2001).]
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post #11 of 18 (permalink) Old Oct 28th, 01, 09:39 AM
 
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Isn't Delrin actually ultra-high molecular weight polyethylene (UHPE)??

And is tough as nails!!! pdq67



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post #12 of 18 (permalink) Old Oct 28th, 01, 11:12 AM
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It's tough allright.
Acetal is the generic name, Delrin is one of the brand names for it.
Here is a link to a page with specs on it. http://www.interstateplastics.com/meta/fmace.htm
The lower and upper ball joints are lined with it on my Lola. The origonal material appeared to be Nylon.
David

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post #13 of 18 (permalink) Old Oct 29th, 01, 07:26 AM Thread Starter
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RockyMountainRacer: What brand of polyurethane bushings did you use?

And also I have been searching for polys which dont squeak, and the company PROTHANE seems to have a good product. Does anyone have any experience with Prothane bushings?
http://macsspring.com/website/urethaneframe.htm


Thanks
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post #14 of 18 (permalink) Old Oct 29th, 01, 07:43 AM
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I've got the black (supposed to be graphite impregnated) Energy Suspension bushings in the front springs eyes on my '68. They've been in for over a year, and I've not heard any squeaks. Every bushing on the car is Energy Suspension, no squeaks anywhere. I did use lots of their grease they sell when installing them. The ride is a little rougher, but to me is well worth the improved handling that it seems to have now.
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post #15 of 18 (permalink) Old Oct 29th, 01, 10:10 AM
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To pdq67:
Delrin is only a "trivial" name for (on German):
POM=Polyformaldehyd
Density 1,5 g/cm3
"Zugfestigkeit" 70 N/mm2

MK


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