poly/standard bushes

[TJC46]

Hi guys would appreciate some advice on poly v standard bushes. I know the poly bushes have a longer lifespan, but are they worth the extra cost. I have the car totally stripped at the moment and intend to renew all the suspension bushes just dont know which way to go. Reading other forums poly bushes need to be lubricated on a regular basis, is this correct? Any advice/disscussion on this subject, thanks Tom.

[spend]

When you have slaved away burning / cutting / pressing / drifting metelastic bushes out/in and then realize polys just press in&out you will not worry about the cost difference

Edited by spend on Sunday 23 November 14:05

[Red Cabbage]

spend said:

When you have slaved away burning / cutting / pressing / drifting metelastic bushes out/in and then realize polys just press in&out you will not worry about the cost difference

Edited by spend on Sunday 23 November 14:05

And you'll never have to burn/cut/press/drift again!

The ride is improved and your suspension settings should stay true a little longer too.

[S7Paul]

Don't even think about it, just do it. The poly bushes are easier to fit/remove, and the increased rigidity means that the wheel alignment is maintained more accurately.

[WokingWedger]

The ride is improved and your suspension settings should stay true a little longer too.
[/quote]

Is that correct, elswhere I read that polybushes make the ride more 'firm', or do you consider firmer is 'improved'

[shpub]

What actually happens is that the owner gets used to the current ride quality which gets softer and softer as the original bushes get worn. At some point, the wear starts to affect the handling and they are replaced. The ride quality returns to what it was when the car was built which will often be firmer than the state the car was immediately prior to the bush replacement. End result is that the ride is described as firmer. The implication is that the ride is firmer to what it was originally when in fact it was firmer compared to the ride with worn out bushes.

[spend]

You can also get different grades of poly bush, most do however choose the harder ones.

[TJC46]

Thanks for the input so far, but apart from not having the struggle of removing/refitting rubber bushes no one, in my opinion has convinced me that poly bushes are better. Do present day car manufacturers use poly bushes? Apart from the work involved if i fitted all new rubber bushes then there is no problem with the suspension/handling. I grant you there may be in a few years, but that might also be the case with poly bushes. Im not trying to force my opinion on anyone just trying to get other peoples opinions FOR or AGAINST. I also do not intend to do trackdays with my chim, so come on guys lets get a good disscussion going here poly or standard. Anyone out there with negative feedback on poly bushes/ i.e ride too harsh etc, thanks Tom.

Edited by TJC46 on Tuesday 25th November 13:25

[Badmutha]

Just veering slightly off track, there was a post on here some time ago where someone had made a bush extraction tool. I bookmarked it but it's disappeared. Does anyone know who supplied this info please.
Tks
.

[Red Cabbage]

Badmutha said:

Just veering slightly off track, there was a post on here some time ago where someone had made a bush extraction tool. I bookmarked it but it's disappeared. Does anyone know who supplied this info please.
Tks
.

Here you go.

http://www.pistonheads.com/xforums/topic.asp?h=0&a...

[Red Cabbage]

Metelastic bushes have limited travel once torqued up. This causes a springing effect that can conflict with the action of the actual spring/damper. If they are not torqued up correctly i.e. under load this can cause the rubber and sleeve to separate and the bush fails prematurely.

Polybushes can potentialy rotate 360 and therefore have none of these problems.

The bound/rebound of my dampers seems smoother and controlled since fitting polys.

[Badmutha]

Red Cabbage said:

Badmutha said:

Just veering slightly off track, there was a post on here some time ago where someone had made a bush extraction tool. I bookmarked it but it's disappeared. Does anyone know who supplied this info please.
Tks
.

Here you go.

http://www.pistonheads.com/xforums/topic.asp?h=0&a...

Thanks Red Cabbage
Bm

[vee5]

I've heard that it's advisable to NOT use poly bushes in the front top wishbone mounts as heat from the manifolds knackers them. No personal experience to back this up with, mind.....

[HRG]

Red Cabbage said:

Badmutha said:

Just veering slightly off track, there was a post on here some time ago where someone had made a bush extraction tool. I bookmarked it but it's disappeared. Does anyone know who supplied this info please.
Tks
.

Here you go.

http://www.pistonheads.com/xforums/topic.asp?h=0&a...

There's a full write up complete with engineering drawing if you want to make your own here:

http://www.thegriffithpages.com/modifications/chas...

[shpub]

vee5 said:

I've heard that it's advisable to NOT use poly bushes in the front top wishbone mounts as heat from the manifolds knackers them. No personal experience to back this up with, mind.....

The Powerflex kits come with protective heat shields, where needed, so this isn't an issue.

[trackcar]

Indeed . I commissioned the powerflex bushes for the TVR grif/chims and set the ball rolling, then ansolutely shocks supplied a car I think and one of the issues was the heat from the manifolds on teh poly so they came up with the reflective wrapping for the kit, not had a problem with heat on any powerflex bush with the wrapping kit

[Badmutha]

HRG said:

Red Cabbage said:

Badmutha said:

Just veering slightly off track, there was a post on here some time ago where someone had made a bush extraction tool. I bookmarked it but it's disappeared. Does anyone know who supplied this info please.
Tks
.

Here you go.

http://www.pistonheads.com/xforums/topic.asp?h=0&a...

There's a full write up complete with engineering drawing if you want to make your own here:

http://www.thegriffithpages.com/modifications/chas...