Poly bushes
I discovered the other day that one of my front struts has started to leak so have bought some new KYB replacements.
While I am doing this I have decided to go "balls out" and do almost everything up front so I have also ordered some new bump stop dust guards and drop links. I want some new anti roll bar bushes and strut bar cushions but cannot find anyone who makes poly bushes for these. In fact I cannot even find rubber roll bar bushes either as my bar seems to be 22mm and UK cars had thicker bars.
Do SuperPro do these?
POLY BUSHES
Dropped off my Pajero IO to Poly Tuff near me in Brisbane Australia and will SOON have the three front diff bushes done in POLY and the rear sized up for those who want to run Poly bushes in the rear upper and lower control arms!!
It's so weird this post comes up the day I drop my IO off the the shops R&D!!
Diff bushes in poly are not a bad idea.
Polyurethane diff mounts are not a bad idea - they will be firmer than rubber and allow less movement - on the other hand - I would definitely not use them in the radius arms of a live rear axle.
I'll be waiting to hear how you feel about them.
Polytuff
Polyurethane diff mounts are not a bad idea - they will be firmer than rubber and allow less movement - on the other hand - I would definitely not use them in the radius arms of a live rear axle.
I'll be waiting to hear how you feel about them.
Yeah mate I made a seperate post so will track how they go!
Hopefully they work and we have a supplier here in Aus who can export world wide!
At least for the front diff bushes! What's your thoughts on maybe just the upper control arms to go poly?
Reply here or reply there?
You asked the question here - but I do feel the reply really belongs in the other thread.
Back when I needed rear bushes and could not find, I was toying with the idea of fabbing a set of adjustable links using rod ends (like the Currie Enterprises Johnny Joints) - the trouble with rod ends is they transmit noise, so the norm is to use them at one end of the link only.
You could do the samething with polybushes - use them at the frame end of the link and rubber at the axle.
Rubber bushes are usually bonded to metal sleeves - an outer sleeve that is a press fit into the eye on the link, and an inner sleeve that is clamped in place at the two ends by the bolt that passes through the middle - although not all of the bushes on the iO have these sleeves. The movement of the axle causes the rubber to twist in beween the sleeves.
Poly bushes are not bonded and have signifcantly less "compliance" (they don't twist like rubber) - a poly suspension bush is usually a press fit in the eye on the link, and pivots (like a bearing would) on the inner sleeve.
The movement at the frame end is essentially up/down, but at the axle end, things are different - the two ends of the axle move independently up/down, forcing a twisting movement - this twist is present at both ends of the link, but more at the axle end.
Syndicate
Be VERY careful with SuperPro
Looking at their various online pages it has become quite clear that they have no clue as to what really fits what vehicle and don't really care either - as an example, you'll find them advertising IRS stuff for the iO, which is not IRS, it's a live axle.
Having pointed that out - I haven't seen any polyurethane bushes for the iO, and I'm not sure I would fit them if I could find them - polyurethane has it's advantages & it's disadvantages - the big advantage is that it is impervious ot most oils & greases so it outlasts rubber, but a disadvantage is that it needs to be lubed frequently to prevent wear - if you're not going to lube it, then you can expect rubber to outlast it - unless you plan on ignoring the play caused by the looseness that results from the wear, and that really negates the purpose of the poly bushes - one more thing - if you don't lube it, expect it to creak, creak, creak over every little bump,
Next up - firmness - you get to decide if this is an advantage or a disadvantage - for street & track vehicles, using poly instead of rubber reduces suspension flex and allows absolutely amazing cornering on the track - on the street you'll feel every bump & crack in the pavement, it's fun at first, but it can get really tiring after a bit - off road, using poly instead of rubber reduces suspension flex, which robs you or articulation which can cause a lack of traction, etc., etc., etc..