Re: [Chevelle-list] suspension bushings - polyurethane, nylon?

2003-09-02 Thread Clint Hooper 



I tend to agree with Herb Adams and GW about not 
using poly bushings in the rear. Though expensive,the Del-a-lum bushings are the 
way to go. Another route is to replace the stock bushings with new rubber ones. 
It's not like they won't last a long time.
Clint HooperHH Custom,ownerLT5 Registry Directorhttp://www.LT5Registry.net/ACES 
#1650http://dalesplace.com/misc/friends/clint_hooper.htm

  - Original Message - 
  From: 
  Galen and Melissa 
  Love 
  
  Hey fellas, give me some input on suspension 
  bushings. I rebuilt my front suspension a few years ago with Performance 
  Suspension Technology's "polygraphite" bushings. These are polyurethane 
  bushings which are impregnated with graphite for lubrication. I'm 
  getting ready to rebuild the rear suspension, but I haven't decidedwhat 
  bushings to go with yet.
  
  If you've ever read the book "Chassis 
  Engineering" by Herb Adams, then you know that he doesn't recommend 
  polyurethane suspension bushingsbecause of the need for the polyurethane 
  to rotate against the metal bushing sleeves combined with the fact that they 
  are not greasable for ongoing lubrication. He says that they will tend 
  tobind preventing smooth operation of the suspension system and causing 
  the car's suspension to not always return to it's equilibrium position. 
  I've noticed this a little bit on my Chevelle, but not to any great 
  extent. I've also noticed some squeaking from the bushings, but nothing 
  too drastic or annoying.
  
  He seems to like bushings using "nyliner" nylon 
  iserts, but I haven't run across anybody that sells them. Has anyone 
  used these "nyliner" bushings? If so, what did you think and where did 
  you buy them? I get the impression from the book that I could go to my 
  local bearing supply house and buy the nyliner inserts, but that I would have 
  to custom-machine some steel sleeves for them to beinstalled 
  in.
  
  Another interesting point - Global West also 
  states that polyurethane bushings tend to bind in the rear suspension. 
  They recommend using a spherical bearing on the frame end and either 
  polyurethane bushingor their Del-a-Lum bushing on therear 
  end.
  
  All right, guys... Chime in and let me know 
  what you think.
  
  Thanks,
  Galen
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RE: [Chevelle-list] suspension bushings - polyurethane, nylon?

2003-09-02 Thread Herb Lumpp 
Hi Galen,

I agree with Herb Adams and Global West.  In fact, I my entire suspension
system is GW.  According to GW, if you use their rear lower arms with the
spherical joint/del-a-lum bushing, you should use the stock upper arm with
rubber bushings.  That's how my rear suspension is setup along with GW coil
springs and QA-1 adjustable shocks.  I'm very happy with the ride and
handling and I'm pretty sure you will be too if you decide to go this route.

Herb Lumpp
http://users.adelphia.net/~hlump/




-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of Galen and Melissa
Love
Sent: Monday, September 01, 2003 10:42 PM
To: [EMAIL PROTECTED]
Subject: [Chevelle-list] suspension bushings - polyurethane, nylon?


Hey fellas, give me some input on suspension bushings.  I rebuilt my front
suspension a few years ago with Performance Suspension Technology's
polygraphite bushings.  These are polyurethane bushings which are
impregnated with graphite for lubrication.  I'm getting ready to rebuild the
rear suspension, but I haven't decided what bushings to go with yet.

If you've ever read the book Chassis Engineering by Herb Adams, then you
know that he doesn't recommend polyurethane suspension bushings because of
the need for the polyurethane to rotate against the metal bushing sleeves
combined with the fact that they are not greasable for ongoing lubrication.
He says that they will tend to bind preventing smooth operation of the
suspension system and causing the car's suspension to not always return to
it's equilibrium position.  I've noticed this a little bit on my Chevelle,
but not to any great extent.  I've also noticed some squeaking from the
bushings, but nothing too drastic or annoying.

He seems to like bushings using nyliner nylon iserts, but I haven't run
across anybody that sells them.  Has anyone used these nyliner bushings?
If so, what did you think and where did you buy them?  I get the impression
from the book that I could go to my local bearing supply house and buy the
nyliner inserts, but that I would have to custom-machine some steel sleeves
for them to be installed in.

Another interesting point - Global West also states that polyurethane
bushings tend to bind in the rear suspension.  They recommend using a
spherical bearing on the frame end and either polyurethane bushing or their
Del-a-Lum bushing on the rear end.

All right, guys...  Chime in and let me know what you think.

Thanks,
Galen


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