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05-24-2010, 11:40 AM
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#26
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Join Date: Jul 2004
Location: West Long Branch
Posts: 13,598
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Quote:
Originally Posted by WildBillyT
Al,
If you know where that was I'd love to see it.
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http://www.nastyz28.com/forum/showthread.php?t=70313
Quote:
Originally Posted by Lowend
Polyurethane and its variations (like poly graphite) have no business being used in any rotational bushing application. This means leaf springs, a-arms, trailing arms, strut rods ect...
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__________________
2/20/2013: They Day the ****s Stopped
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05-24-2010, 11:44 AM
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#27
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Ayatollah of Rock N Rolla / Admin
Join Date: Mar 2006
Location: Parts Unknown
Posts: 12,573
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Quote:
Originally Posted by BigAls87Z28
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Thanks. I figured it would be a post by Brett.
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05-24-2010, 11:54 AM
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#28
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Admin.
Join Date: Aug 2005
Location: Hamilton, NJ
Posts: 20,152
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To the heart of the matter, it is echoed in books like Herb Adams' Chassis Engineering. It's all about the bind, and to a much lesser degree the way it wears. WBT I bet your local library has a copy, it's a terrific book. That said, a poly with a steel insert that is greasable at the pivot point is different from a pure poly bushing.
IMO poly is a step between OE rubber and solid racecar type stuff. With the advent of solid stuff with delrin inserts for a street car you get much closer to the best of both worlds, without the inherent noise and wear issue of actual bearings that are not weathertight. For a pure street car a higher durometer solid rubber bushing is likely an excellent, perhaps cheaper, upgrade.
__________________
Vent Windows Forever!
The looser the waistband, the deeper the quicksand. Or so I have read.
Feather-light suspension, Konis just couldn't hold. I'm so glad I took a look inside your showroom doors.
Hey everybody, it's good to have you on the Baba-too-da-ba-too-ba-ba-buh-doo-ga-ga-bop-a-dop
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05-24-2010, 11:59 AM
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#29
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Ayatollah of Rock N Rolla / Admin
Join Date: Mar 2006
Location: Parts Unknown
Posts: 12,573
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Quote:
Originally Posted by BonzoHansen
To the heart of the matter, it is echoed in books like Herb Adams' Chassis Engineering. It's all about the bind, and to a much lesser degree the way it wears. WBT I bet your local library has a copy, it's a terrific book. That said, a poly with a steel insert that is greasable at the pivot point is different from a pure poly bushing.
IMO poly is a step between OE rubber and solid racecar type stuff. With the advent of solid stuff with delrin inserts for a street car you get much closer to the best of both worlds, without the inherent noise and wear issue of actual bearings that are not weathertight. For a pure street car a higher durometer solid rubber bushing is likely an excellent, perhaps cheaper, upgrade.
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I own and have read that book. Very good but possibly dated in terms of technologies. The wearing/gel thing is what raised an eyebrow.
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05-24-2010, 12:11 PM
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#30
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Join Date: Jul 2004
Location: West Long Branch
Posts: 13,598
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Yeah, I remember reading that when I was putting together the 72's suspension.
__________________
2/20/2013: They Day the ****s Stopped
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05-24-2010, 09:50 PM
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#31
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Ebearnezer Scrooge/Power Member/Lips
Join Date: May 2006
Location: Hamilton, Mercer county
Posts: 4,141
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Over time and under constant pressure a poly bushing CAN cold flow, but it isnt something that you are going to notice in a few years.
I pulled the poly leaf pads out of the 73 a few weeks ago and they had cold flowed enough that they wouldnt go back in nice when I pulled the slapper bars off, I had to put the new ones in that I got with the "U" bolts for the rear.
Josh is completely correct though, for the money a stock rubber bushing isnt worth the time or effort when you can get new, stronger, longer lasting arms inexpensively. If someone is only daily driving a vehicle and doesnt care about performance at all that driver is NEVER going to notice the minimal amount of bind created by the stiffer poly bushing.
Hell I bought all the stuff and put my own LCA's together for around $125. They are on car adjustable and are infinately rebuildable, no brainer
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06-10-2010, 08:53 AM
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#32
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Mongo the Meet Coordinator
Join Date: May 2008
Posts: 16,900
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Is it worth it to replace the front lower/upper A arm bushings with Moog stuff if they are coming off anyway?
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Quote:
Originally Posted by KirkEvil
repo bigals turd gen and part it out to a loving home
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06-10-2010, 08:57 AM
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#33
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NJFBOA Supporting Sponsor
Join Date: Feb 2006
Location: HULMEVILLE, PA
Posts: 2,023
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In my opinion.. No. But I like my cars to look as nice on the bottom as they do on the top.. Plus if its off already why not put something better back on?
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JSSPEEDANDCUSTOM.COM
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06-10-2010, 08:59 AM
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#34
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Mongo the Meet Coordinator
Join Date: May 2008
Posts: 16,900
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Quote:
Originally Posted by JSPERFORMANCE
In my opinion.. No. But I like my cars to look as nice on the bottom as they do on the top.. Plus if its off already why not put something better back on?
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Just current budget issues, I'll do some more research.
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Quote:
Originally Posted by KirkEvil
repo bigals turd gen and part it out to a loving home
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