Notices
924/931/944/951/968 Forum Porsche 924, 924S, 931, 944, 944S, 944S2, 951, and 968 discussion, how-to guides, and technical help. (1976-1995)
Sponsored by:
Sponsored by:

Delrin vs polybronze spring plate bushings

Thread Tools
 
Search this Thread
 
Old 12-14-2011, 01:01 PM
  #16  
Sysgen
Drifting
 
Sysgen's Avatar
 
Join Date: Feb 2006
Location: Montreal
Posts: 2,949
Likes: 0
Received 1 Like on 1 Post
Default

I would say almost every month but if I avoid driving in large downpours I can go longer. Not that it takes a long time, it takes me around 10-15 minutes. I drive the car everyday during the summer.

It squeals or creeks when they get dry.
Old 12-14-2011, 03:02 PM
  #17  
87944turbo
Rennlist Member
 
87944turbo's Avatar
 
Join Date: Oct 2004
Location: Hoosierville
Posts: 2,188
Received 30 Likes on 21 Posts
Default

Have been running Delrin for about 2 years. No squeaking issues, but then again I only drive the car a few thousand miles a year and usually never when it is raining.

Of course now that I have said this, they will squeak the next time I drive it!
Old 12-14-2011, 03:57 PM
  #18  
MAGK944
Nordschleife Master
 
MAGK944's Avatar
 
Join Date: Jun 2007
Location: Palm Beach, Florida
Posts: 6,769
Received 295 Likes on 231 Posts
Default

Adding to my last post, as a delin user I will be fitting polybronze in my track build. Not because they are better but because I will be under there after every track session anyway so greasing them isn't an issue. Whichever type you fit you will have to take your time to fit them correctly. To avoid squeaking on the Delrin they need to fit onto the spring plate and turn with your fingers without being loose.

Here's the skinny:
The original rubber bushes work by twisting which changes their shape and will change your rear alignment settings, not good.

Delrin works by sliding and being low friction they will slide easily without deforming, very good.

Problem is all spring plates are not equal so you have to carefully hone the Delrin to just fit over the cleaned spring plate so that it just fits and can be rotated by hand. Then you have to hone the cleaned spring plate housing and t-bar carrier so the Delrin just fits again and can turn by hand. In both cases it shouldn't be loose.

Once the Delrin is fitted correctly there is no need for any grease. The grease will only attract dirt and wear the Delrin and the Delrin will slide easily without binding. It's the binding that causes the squeaking. When it squeaks the Delrin is trying to act like a rubber bush acts, by twisting, except it will not twist so it squeaks.

Polybronze works with a huge bearing that requires regular greasing. There is no performance advantage of Polybronze over Delrin, they both will do the job well. The Polybronze also needs careful fittment and maybe some honing, but once they are in there they should last as long as the Delrin if greased regularly.

Finally, I don't think the rubber bushes are available as a separate item so the only choice is Delrin or polybronze if yours are worn. I would use Delrin for a mainly street car and polybronze for a mainly track machine but that's just MO.
Old 12-14-2011, 05:18 PM
  #19  
Funn944
Pro
 
Funn944's Avatar
 
Join Date: Apr 2005
Location: Denver, CO
Posts: 721
Likes: 0
Received 1 Like on 1 Post
Default

That Weltmeister grease really is some gooey stuff, I use it on my sway bar bushings and Delrin control arm bushings. Never had a problem with it washing out from rainy driving, and it's a daily driver.
Old 12-14-2011, 07:22 PM
  #20  
MAGK944
Nordschleife Master
 
MAGK944's Avatar
 
Join Date: Jun 2007
Location: Palm Beach, Florida
Posts: 6,769
Received 295 Likes on 231 Posts
Default

Originally Posted by Funn944
That Weltmeister grease really is some gooey stuff, I use it on my sway bar bushings and Delrin control arm bushings. Never had a problem with it washing out from rainy driving, and it's a daily driver.
+1 get it on your hands and soap & water doesn't get it off. Just don't get it in your hair unless you are planning on a haircut. Ask me how I know.
Old 12-15-2011, 05:07 PM
  #21  
nofalls
Racer
 
nofalls's Avatar
 
Join Date: Mar 2009
Location: Tucson, AZ
Posts: 309
Likes: 0
Received 0 Likes on 0 Posts
Default

Rubber bushing are available from Elephant.

http://www.elephantracing.com/suspen...erbushings.htm

-MLK
Old 12-17-2011, 08:00 AM
  #22  
333pg333
Rennlist Member
 
333pg333's Avatar
 
Join Date: Feb 2006
Location: Australia
Posts: 18,902
Received 93 Likes on 76 Posts
Default

Originally Posted by Dubai944
Lol... one race tyre costs me $435 and a set of front pads cost me $398 + shipping. The cost of polybronze is cheap for anyone seriously tracking or racing a 944.

And GT3RS's are slow and only good for passing practise
Heheheh....
Old 12-18-2011, 05:38 PM
  #23  
mikey_audiogeek
Three Wheelin'
 
mikey_audiogeek's Avatar
 
Join Date: Oct 2004
Location: Northland, New Zealand
Posts: 1,547
Received 7 Likes on 6 Posts
Default

Why not get some made from Vesconite? http://www.vesconite.com/

Cheers,
Mike
Old 12-18-2011, 05:59 PM
  #24  
MAGK944
Nordschleife Master
 
MAGK944's Avatar
 
Join Date: Jun 2007
Location: Palm Beach, Florida
Posts: 6,769
Received 295 Likes on 231 Posts
Default

Originally Posted by mikey_audiogeek
Why not get some made from Vesconite? http://www.vesconite.com/

Cheers,
Mike
Never heard of it, looks like it would do the job. Particularly like the no grease aspect, they should use this for the control arm ball joint kits, I never quite know when I should grease mine. I suppose the only question is - do they squeak?



Quick Reply: Delrin vs polybronze spring plate bushings



All times are GMT -3. The time now is 03:44 AM.