Delrin vs polybronze spring plate bushings
#16
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.
It squeals or creeks when they get dry.
#17
Rennlist Member
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!
Of course now that I have said this, they will squeak the next time I drive it!
#18
Nordschleife Master
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.
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.
#19
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.
#20
Nordschleife Master
+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.
#21
Rubber bushing are available from Elephant.
http://www.elephantracing.com/suspen...erbushings.htm
-MLK
http://www.elephantracing.com/suspen...erbushings.htm
-MLK
#22
Rennlist Member
#24
Nordschleife Master