Polyurethane bushes

[JL]

Does anyone supply polyurethane suspension bushes for the Murena and if so has any one tried them?

John

[Anders Dinsen]

Simon has some for the lower bushes on the front shocks. Look here (scroll down at bit):
http://www.simon-auto.de/matra/englisch/mur_tuning.htm

Why are you considering PU bushes?

- Anders

[Bart_Maztra]

there is an article in a german magazine about making your own poly bushes.  If you are interested, i can scan it and post it.

[JL]

Hi Anders and Bart

I am just considering tightening the suspension setup but I do not want to change the spring rates.

I would be very interested to see the article on making your own PU bushes.

Thanks

John

[krede]

I asked simon about the availability of Pu bushes for the murena (other then the ones he carry) and as far as he is aware no one make them for these cars.

Those for the shocks wont make much of a difference. I use them on my car (the old ones were too far gone) but i cant really tell that they are different.

as for Pu bushes in general... I'd say they are only for racing .. ..and good quality stock bushes should still make a HUGE difference over 20 year old worn out ones..

and as for making bushes yourself...... well......as long as you can still obtain normal ones.. Id risk a beer(cold.. of your choice) that it's not gonna be worth the effort ... though it would be an interesting project if one is so inclined 

[JL]

Thanks for the info Krede; looks like it will be standard bushes then.

I am still interested to know about how to make your your own PU bushes though.

John

[Waldo]

Hmm...
not that I have any experience with DIY PU bushes, but I know that our plastics supplier can supply PU bars, I guess all you need is a leathe and a bit of time...

I have had rubber materials machined before, it's not the easiest material to work with, but it's possible 

But as Krede mentioned, possible not worth the effort... 
I probably have both the material and a leathe at work, and I still wouldn't be bothered if I can still get fairly cheap orig. rubber bushes...

Thanks for the info Krede; looks like it will be standard bushes then.

I am still interested to know about how to make your your own PU bushes though.

John

[Bart_Maztra]

The DIY pu is made by mixing two liquids, and pour it in a mould.
Give me a few days to do the scanning.

[darrenheli]

ive got them on the front and rear on my car . i kept spliting them on the front coil overs and the problem has now gone away, but you will not notice the difference when driving

[Bart_Maztra]

It's a bit late, but here it is.

[JL]

Thanks for the information, if I can find the components I will give it a try.

John

[RazorbackNOR]

Does anybody speak enough german to be able to translate this to english....?

[lewisman]

This is the website:

http://www.heinrici-klassik.de/start.php

[Bart_Maztra]

http://www.heinrici-klassik.de/start.php?d_2421_Urethan906.php


A short translation:

You need to get an innertube, which is exactly the same as the original. Same lenghth and diameter and wallthicknes. You might have to make it on a lathe.
You also need an outher tube.  If the outhertube is part of the bush, it needs to be exactly the same as the original.  If the outher tube is not part of the bush, you need it anyway as a mold.  In that case the inner diameter is important. Apply some silicon spray on the inside, so the polyurethane will separate easily.

Use a magnetic plate to hold the tubes in position.

Mix the polyurathane and the hardener at a rate of 1 to 0,35. Mix it for 4 minutes slowly (to prevent incloser of air). Then you can apply it for 20 minutes.
Setting will take 4 hours, but it needs 8 days before it can be used!

One package contains 810 gram which cost about 50 euro. One bush needs about 15-20 gram so that will cost about 1,50 euro. Add the costs for the tubes.

[krede]

Well.. it does sound tempting...
My concern would be the quality of the rubber... and how well it will adhere to the steel parts.