Fast road (Yellow) Polybushes on a road car?
Discussion
Seems as the bushes etc on the B are old(er than me!) I'm going to refresh the suspension by rebuilding the cross member and replace the rear bushes, cross member pads and rear spring pads.
I'm considering the fast road (yellow) Polybushes and just wonder how suited they are to road use, is there much increase in road noise etc?
I'm considering the fast road (yellow) Polybushes and just wonder how suited they are to road use, is there much increase in road noise etc?
Didn't notice any increase in road noise when I did mine, I put new springs on the rear at the same time, with stiffer front bushes in the spring (iirc they were blue... can't recall where I got them). Did the front suspension bushes in an earlier refurb-frenzy, again didn't notice any noise increase.
...made the handling much better however
...made the handling much better however
I had yellow fast road urethane bushes on my Midget and they seemed to me in my personal experience and driving style to be a little hard/firm but not that much to be upsetting
I now have SuperFlex (purpleish/blue) polyurethane bushes which I seem prefer in my driving experience and style, no track stuff, everyday, holiday and touring use
I've put seem as,
the full suspension sets of yellow urethane were put on with recon. uprated lever arm shocks and new standard springs at front and existing Spax and newish springs at rear,
and the full suspension sets of SuperFlex polyurethane with new Avo shock conversion and uprated lower springs at front and Avo shocks and new standard springs at rear
I now have SuperFlex (purpleish/blue) polyurethane bushes which I seem prefer in my driving experience and style, no track stuff, everyday, holiday and touring use
I've put seem as,
the full suspension sets of yellow urethane were put on with recon. uprated lever arm shocks and new standard springs at front and existing Spax and newish springs at rear,
and the full suspension sets of SuperFlex polyurethane with new Avo shock conversion and uprated lower springs at front and Avo shocks and new standard springs at rear
I think you'll find that urethane and polyurethane are one and the same thing in this application -the difference being only in the shore hardness rating.
IMHO PU bushes are a silly fad in suspension applications, primarily because you are using them as a plain bearing material with sliding contact on the mounting sleeve, which is fine as long as they stay lubricated. For most cars except track day specials any increase in stiffness over new bonded rubber bushes will have negligible effect on handling. They will also have a much shorter life.
Bonded rubber is a very elegant, effective solution to providing articulation without sliding contact together with vibration isolation, and has been proven over decades. Stay with new rubber bushes.
IMHO PU bushes are a silly fad in suspension applications, primarily because you are using them as a plain bearing material with sliding contact on the mounting sleeve, which is fine as long as they stay lubricated. For most cars except track day specials any increase in stiffness over new bonded rubber bushes will have negligible effect on handling. They will also have a much shorter life.
Bonded rubber is a very elegant, effective solution to providing articulation without sliding contact together with vibration isolation, and has been proven over decades. Stay with new rubber bushes.
V10Mike said:
I think you'll find that urethane and polyurethane are one and the same thing in this application -the difference being only in the shore hardness rating.
IMHO PU bushes are a silly fad in suspension applications, primarily because you are using them as a plain bearing material with sliding contact on the mounting sleeve, which is fine as long as they stay lubricated. For most cars except track day specials any increase in stiffness over new bonded rubber bushes will have negligible effect on handling. They will also have a much shorter life.
Bonded rubber is a very elegant, effective solution to providing articulation without sliding contact together with vibration isolation, and has been proven over decades. Stay with new rubber bushes.
I'd agree - the trick is to find bonded rubber bushes of adequate quality.IMHO PU bushes are a silly fad in suspension applications, primarily because you are using them as a plain bearing material with sliding contact on the mounting sleeve, which is fine as long as they stay lubricated. For most cars except track day specials any increase in stiffness over new bonded rubber bushes will have negligible effect on handling. They will also have a much shorter life.
Bonded rubber is a very elegant, effective solution to providing articulation without sliding contact together with vibration isolation, and has been proven over decades. Stay with new rubber bushes.
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