I have no problem with tyre wear anymore, so ball joints are fine, I do need a toe rod adjustment but I only have high energy bushes at the moment.
Lol you didn't look very hard. Go to UAS website, shop, suspension, and you will find http://www.uniqueautosports.com.au/Parts-Shop/uas-pivoting-adjustable-top-control-arms-564.aspx
I did look Just didn't expect them to call them by some stupid name like uas pivoting top adjustable control arms wow - they are pricey but they do look solid
Cheap Bok Choys I am assuming the UAS V2 pivot is a NSK Bearing? Cannot quite see it on the website picture as its a bit small. I like the idea of a pivot bearing as this would reduce the wear on the bushes/ bearings significantly so hoping you know offhand whether it is a pivot bearing. Tyre wear problem was fixed when we put in the el cheapo Bok Choy FUCA's but I was pushing on the wheel doing checks the other day and those Bok Choys have recently developed play in them in the centre thread. So the car is off the road before they snap off altogether and so I need to get some quality units like I should have done in the first place. Shims are the go but to get the best dial in for tyre wear I will go adjustable. I mean its not like I am going 4X4 driving so just a quality set will do the job The bok choys look quality but the materials and design are obviously inferior as the flex has obviously stripped the thread enough to allow play. The bastards should stick to making spades and shovels before they kill someone else again. Hence my question, seems like there is quite few that will do the job like SPL/Z1 etc. but the UAS V2 seem to be the ones given the pivot bearing Do it properly like I should have done in the first place
Yes they use bearings at either end and the arm itself pivots. Yes, because the bearings don't allow the arm to pivot through an arc as per stock, so that load is applied to the centre of the arm.
The actual design of most is faulty to begin with, the idea of using a screw then subjecting it to twisting forces without relief is dumb engineering at its best. I have seen slides used (I think they were stillens modified) but don't know how good they were/ are but worst comes to worst the wheel wouldn't collapse fully unlike the screw types where all hell breaks lose when it comes apart. The UAS are the only other ones I have seen address the twisting forces. In theory they would have a better wear design than stock, I think I will go with them and be done with it. Cheers
Nothing wrong with screw type adjustment on a suspension arm, the UAS arms have this too. So long as the pivoting stress is relieved elsewhere. The whole pivoting arm thing is not terribly well known.
Not if your bok choy As long as the adjustment screw is designed to not move once set it can be sound in engineering. The fact that the screw moves in many is where the wear and tear and eventual stripping and collapsing occurs. High quality forged materials can make the difference regardless compared to the el cheapo bok choys, so I agree with you if its designed well the screw can work but not if poorly designed. The point here is that Bok Choy FUCA's are downright dangerous and shouldn't be on the market!
Couldn't agree more Do you remember me showing you the UAS arms when I was up there? Can't remember what you said, something something holy shit they're expensive haha
Well Jamie, you should be comforted by the knowledge that, over the years of Z ownership, I have purchased(and discarded) six sets of varying UAS designed FUCA's EVERY ONE OF WHICH DISINTERGRATED and/or BROKE IN HALF. Most of John's attempts to find a successful/reliable design was based on my constant need for replacement items, and yes, I did have a set of the Mk1 Swiveling FUCA's from UAS. They bent in the middle after a drive to Warwick, QLD and back. THIS IS NOT A SHOT AT UAS, BUT RATHER AN INDICATION THAT THERE ARE COMPLEX FORCES IN PLAY ON FUCA'S IN Z32'S.:br:
hey Chili gone through the same as you over the last 10 years including UAS v1 bending. But the version 2 UAS FUCA won't bend and are the best upgrade and fix. Being in the trade most of my life ,I can't see any design option that will be better . Sometimes it takes a few goes to get things right but not at our expense .
has anyone ever seen a set of adjustable (screw type) arms that still use a regular rubber or urethane bushing? ive seen the ones using bearing, and ive seen offset urethane bushings, but id prefer to have the adjustable screw type with the factory still rubber bushings....
At one stage Z1 arms were going to have a "race" version with bearings and a "street" version with bushes. Could be worth investigating.
just seems the bearings commonly flog out. bushings, while they will still ear out, can take a bit more of a beating. plus you can press them out and go again. and they are less harsh coz they have a bit of give.
Yep - the Z1 "street version" has energy suspension bushes compared to the "race" version which has bearings with a billet aluminium body and a stainless thread. It does not compensate for the twist forces regardless of bush or bearing and so the thread is still subject to twisting on the screw which incurs wear. However the stainless screw on a Z1 is of a much higher quality compared to the bok choys, so they are much stronger and will wear only over a long period of time. Other high quality forged screw threads offer a similar protection like SPL etc UAS V2 is the only real true solution to a no worries FUCA other than the stock versions.
I am still yet to see any form of evidence that this occurred without striking the arm on the mounting bracket. IMO, clearance the bracket and the arms are fine. If beefier arms "fix" this issue, and having suspension arms striking the body under load is okay with you, I'm concerned...
Your dead right! Street versions face lots of potholes whereas Race versions don't and so the FUCA needs to be able to absorb the shock of a large pothole. Bearings don't give at all and any weak screw or weak bearing will bear the brunt. Even higher quality steel cannot withstand high repeated stress loads without facing fatigue. This is where bearing types and non absorption FUCA's fail - they might be great for racing but not a road with huge potholes. Its also why Z1 states make sure you don't get race, if your using for street! The Z1 however uses aircraft grade aluminium body for the FUCA. Powertrix look the most solid of all of them but have bearings! Stock with Shims or UAS V2 are the only real choices technically in my opinion If you drive on the street at all with aftermarket FUCA's, you need either a pivot bearing or bushings or both otherwise your FUCA's may fail after a few large potholes. SPC, Megan, Powertrix and others will hold up for some time but the design will suffer shock loading of stress and with bearings this means there is no absorption and inevitably there designs will weaken over time. Bok Choys on the other hand are made with cheap steel, they look solid but fold under pothole testing soon after and are downright dangerous, but the whole world knows that china means cheap and nasty - caveat emptor. SPL as you know don't do FUCA's only RUCA's. I actually meant SPC but it wasn't relevant, I was merely mentioning others like Megan, Powertrix that use high quality forged screws etc. Sorry for the confusion.
