[stockman]

Just wondering whats the best bushes to use for Sierra suspension?

I have searched but not much specific talk on bushes.

[SierraDan]

I rate the Ironman poly bushes.

[Fatzook]

I've always been partial to rubber. Poly rarely flexes better (although it can last longer depending on the duro ), I also find that rubber rides a bit better.

[Gwagensteve]

I think Bruce on here does some very soft poly bushes that seem very good. Generally I've preferred rubber over the years, but they can have a short life. I have seen lots of cracked stock shackles due to excessively stiff urethane bushes.

Steve.

[BlueSuzy]

I've heard Bruce's bush is best

[atari4x4]

BlueSuzy wrote:

I've heard Bruce's bush is best

i think Bruce's bush in the stekky spec are the ones to get.

[sideways]

BlueSuzy wrote:

I've heard Bruce's bush is best

Wait, what?

atari4x4 wrote:

BlueSuzy wrote:

I've heard Bruce's bush is best

i think Bruce's bush in the stekky spec are the ones to get.

Can anyone (perhaps Bruce? ) elaborate on his range of suspension bushes? I don't believe there's a thread specific to them anywhere? Maybe a post in the business section?

I need some new bushes for the Sierra.

[mrw82]

If you pm Bruce I'm sure he can help you out.

[Scrawny]

BlueSuzy wrote:

I've heard Bruce's bush is best

I'm also lead to believe this...... although I can neither confirm nor deny

[stockman]

So I ended up going with Bruce's super soft bushes.

sideways wrote:

Can anyone (perhaps Bruce? ) elaborate on his range of suspension bushes? I don't believe there's a thread specific to them anywhere?

I'd like to here the differences between the bushes too.

[Bruce]

What do you want to know? How tech do you want me to be or go?

Std hardness bushes are 90A Duro. Most in the industry will make 90A bushes weather its for a Pootroll or Sierra. Why you ask, because its the most popular material to use in the industry.
I know a lot of people in the industry will be pouring a 90a material and have some leftover and just pour the leftovers into the shackle moulds. Now just because it's 90a does not mean it's the correct marerial for the bushes. It might feel the same hardness but does not have the correct properties.
Now there is over 50 diff types on polyurethane. From as soft as a rubber band to harder than nylon. Some work better in oil, some better in water, some better in Acids etc.
Poly can come in polyester or polyether. There are others but that covers most.
Some will have more Elongation than others, some will have a better coefficient of friction, less hysteresis etc. (boring you all yet?)

So when we started to play with Sierra bushes we thought we would get out of the norm and try some different hardnesses because a Sierra does not weigh the same as a Nissan etc.

The first was a 50A as a trail. We fitted them to Royce's Sierra. Boy it flexed well but lasted weeks not years.
We have played with other hardnesses and I tried 70A in my comp zook.
Now I don't drive this car on the road so life of the poly was not a worry to me cause to replace them was nothing to me.
I found that 70a worked the best for flex but WILL NOT last anywhere near as long as the 90a std hardness.
The 90a works well for allround driving and the weekend play but the 70a work better for flex.
I HAVE NOT DRIVEN a sierra onroad with the 70a. I think it would get the wobbles up more so than std hardness. I cannot give people a time frame on how long they will last.

Now don't get me started on people saying that poly is crap and makes lots on noise.
Don't get me wrong either, there is nothing wrong with Rubber either.
Each to their own I guess.

[Fatzook]

Bruce wrote:

Most in the industry will make 90A bushes weather its for a Pootroll or Sierra. Why you ask, because its the most popular material to use in the industry.
I know a lot of people in the industry will be pouring a 90a material and have some leftover and just pour the leftovers into the shackle moulds. Now just because it's 90a does not mean it's the correct marerial for the bushes. It might feel the same hardness but does not have the correct properties.

This is why I avoid poly if possible. Too many cowboys in the industry.

[Bruce]

Fatzook wrote:

Bruce wrote:

Most in the industry will make 90A bushes weather its for a Pootroll or Sierra. Why you ask, because its the most popular material to use in the industry.
I know a lot of people in the industry will be pouring a 90a material and have some leftover and just pour the leftovers into the shackle moulds. Now just because it's 90a does not mean it's the correct marerial for the bushes. It might feel the same hardness but does not have the correct properties.

This is why I avoid poly if possible. Too many cowboys in the industry.

And that's why we make sure we use the correct material for the correct application.
The amount of questions I have to suck our of new and old customers is like pulling teeth. We as a poly shop want to supply the right material for the job they want it to do. SUre I can just say, yep mate you want poly we can do that and just make whatever we want. There is a base grade poly that is about 94a. It's good for what it does. I could just as easy make spring spacers out of it and make them almost 1/2 the price but WE WON'T EVER because as much as it feels the same it will not do the job for long.

Peter you say you avoid poly if possible, then buy all your poly from me.

[Fatzook]

Bruce wrote:

Peter you say you avoid poly if possible, then buy all your poly from me.

Yep. Cos you know what you are doing.

I wouldn't buy stock from you if I didn't have 100% faith in your knowledge and product

I still prefer rubber for bushes though.

EDIT: just adding to that, unfortunately rubber is not as workable as poly ( custom moulds etc ) and that makes poly superior to rubber in alot of applications..... so; atleast in suspension; poly has its place.

Don't worry bruce, I still <3 you

[Bruce]

Yep Rubber is good for lots of things, but as you siad, there is a lot more flexibility in Poly at times.