Discussion
Matt99man said:
Ohh what to do….mixed info. Some say go for poly, some say go for original…what to do?!
Think about it logically. I’m pretty sure most car manufacturers still use Rubberised bushes. They are incredibly cheap considering there life expectancy which can be decades.
Poly are stiff and non compliant. They are for racing cars that do about 1 hrs work a race meeting and usually replaced every year.
Most people do it simply because it’s easier to install Poly but in the longer run a very bad idea on what is already a firm ride. Roads will destroy them much quicker than smooth racetracks will.
Access to a large vice and a number of cut tubes or sockets is usually all you need to press them out and replace using the same method. A ten tonne press at an engineers place wouldn’t budge one of mine yet a vice pushed it out in seconds!
IMHO, OE with thrust washers as thrust washers were a retro fit item which became OE (IF you already have them you can reuse 'some' of the old ones). IF you go poly, go Powerflex black which are a lined version of poly bush with supports on the rear front lower and front rear lower (these are positions that you cannot fit thrust washers). Modifying the top rear outer washers (camber adjuster is a must as the eyelet punches over the thrust washer). A@
Not sure about more compliance on the std bushes (well until they fail, which they will ..) .. all the poly bushes have a low friction rotating sleeve inside the poly bush meaning they are more compliant in rotation that the std rubber bush, especially the glacier bearing style powerflex bushes which almost replicate the rotational low friction of a rose joint. They are also much easier to change.
The std rubber bush has barely any rubber in it anyway so minimal compliance.
Std is cheaper though.
The std rubber bush has barely any rubber in it anyway so minimal compliance.
Std is cheaper though.
spitfire4v8 said:
Not sure about more compliance on the std bushes (well until they fail, which they will ..) .. all the poly bushes have a low friction rotating sleeve inside the poly bush meaning they are more compliant in rotation that the std rubber bush, especially the glacier bearing style powerflex bushes which almost replicate the rotational low friction of a rose joint. They are also much easier to change.
The std rubber bush has barely any rubber in it anyway so minimal compliance.
Std is cheaper though.
100% agree with that.The std rubber bush has barely any rubber in it anyway so minimal compliance.
Std is cheaper though.
Kitchski said:
spitfire4v8 said:
Not sure about more compliance on the std bushes (well until they fail, which they will ..) .. all the poly bushes have a low friction rotating sleeve inside the poly bush meaning they are more compliant in rotation that the std rubber bush, especially the glacier bearing style powerflex bushes which almost replicate the rotational low friction of a rose joint. They are also much easier to change.
The std rubber bush has barely any rubber in it anyway so minimal compliance.
Std is cheaper though.
100% agree with that.The std rubber bush has barely any rubber in it anyway so minimal compliance.
Std is cheaper though.
especially the compliance bit no where near enough solid rubber or voids in the OEM bushes to call that the poly makes for a more aggressive ride quality it dont even the black grade and Ive driven plenty with both options , but yes OEM will go 20 years plus with thrust washers IME hoofa said:
Don t waste your money on poly bushes, centre gravity replaced all mine for standard ones as they couldn t get the geo right. Stick with standard cheaper and will last longer. Been there got the t shirt
I fitted my full chassis refurbishment with powerflex bushes in 2012, plenty of trips to le mans with fully loaded car, l'm still on the original set and fingers crossed long may it remain so. Edited by hoofa on Monday 10th October 22:07
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