Polybush

[benbenukuk]

hi, can I please have your thought on polybuses shall i go for the ones that chris perfect sell or the ones that paddock do I would like a good ride for off roading.  Ben

[jonny ramrod]

cp over paddocks any day....although some people say just to renew your standard ones.

[jjsaul]

if you have a press or can get em put in, a lot of people have recommended to me to replace with genuine parts rubber ones.

polybushes main advantage is that they are easier to put in...

[AbyssDJ]

polyurethane for ease of fitting, original rubber for...... if you like an awkward job i spose? still... to improve the general ride, you'd probably get more of a result from parabolic springs

[Rich_P]

I personally advise against polybushes on a Series if you intend to have bushes that last longer than a matter of months.  Polys are easier to fit, but have shorter lifetimes on a leafer it seems.

[AbyssDJ]

shorter lifetime in general i think, unless (maybe) you spend on genuine polybush.

[jjsaul]

shorter lifetime in general i think, unless (maybe) you spend on genuine polybush.

yes, if you do decide to go the polybush route, the genuine ones are better than the cheap deflex copies..and by the time you've spent that much on them you might as well buy rubber bushes!

[jonny ramrod]

from what i have heard from people in 'the know' , the polybush may keep it's shape, but the tiny amount of movement has to go somewhere, so the ajoining components can wear instead. Leading to oval holes etc..

i would stick to the standard items..

[Les Henson]

Poly bushes - expensive, easy to fit, don't last long (mine lasted just over a year)

Standard bushes - cheap, quite hard to fit, last years.


Les.

[benbenukuk]

what is the ride difference between standard bushes and polybushes? is one softer that the other?  Ben

[Welshbreed]

you can get soft and hard polybrushes, one set are red the other set is blue. both by ploybrush. dont go for fake polybrushes.

[S188]

I don't see how polybushes can help a leafsprung suspension setup, infact it should make it worse...

On a standard bush the outer and inner sleves are atached to the spring and chassis respectively.  In between is some softish rubber that alows a limited degree of rotation about its axis, which is usead as the spring changes shape - fine!  A polybush locates a simular way but I can't see it offering so much rotation and thus make the spring less flexable.

Another thing leaf sprung suspension does when it articulates is twist slightly, when your on an axle twister the axle isn't leval with the chassis, yet the spring under the axle is parallel with it, as is the inner parts of the bushes parralel with the chassis.  some of that twist is achived in the spring (most of it probubly) and some can come from squashing the rubber bushes a bit.  A polybush won't alow that at all so if anything will reduice articulation.  Improving this twist thing has a drimatic affect on axle articulation as is proved by things like gone2far kits.

Thats my persional view, to me it makes sence, what do others think? Am I just talking crap because I've never seen the need to spend money on them?  I'm sure they can help improve handleing on a race machine with sufisticated suspension but I think the leaf sprung landy kits are made because they can (ofterall everything else has them avalable too) rather than its a really brileant idea?