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alex yates said:OEM quality just means they are in specification laid down by Porsche.
That is very interesting that you are modifying arms, have you also experienced the poor quality aftermarket arms. I have been measuring polyurethane shore hardness but more importantly deflection rates with interesting results. You are welcome to any help I could provide and I am currently working on a deflection rig to repeatedly and consistently take measurements.That's very interesting work you have been doing with this project Mark. I have modified and will market my own upgraded LCA's in the future. From an interest point of view, when I produce my first batch, could I send you a sample to test to see how they fair? I currently only have 4 prototype arms but unfortunately they are all fitted to my car so it will be a little while before I can send one.
Kind regards
Richard
wasz said:Meyle had a batch of short arms, seems to be resolved.
TRW are the OE supplier, good luck finding them anymore.
nordicmatter said:The meyle arms are not Porsche arms and the quality is some what different from the original TRW Porsche OE supplier. There is light at the end of the tunnel regarding theses considerably cheaper arms.
The ball joint is good quality and the inner bush is ok with a shore hardness of around 74-77. I measured a genuine porsche bush at a consistent 80 shore. The middle bush is very different and I purchased 5 meyle arms new and the stiffness is two thirds that of an original item at around 55- 66 shore and the Porsche is again a very consistent 80. There is a very cheap fix which I will post over the next week or so. This improves these arms better than the original ones and the drive is vastly improved. I am sure these arms are great for a boxster but on the turbo 996 and the very early 997S (same rear arms as 996) they cause the dreaded weave under hard acceration. According to google research Porsche had a fix of turning the centre bush 90 degrees to basically change the load points on the bush to act like a solid bush as per later cars. I have not confirmed this with a dealer but google 997 wiggle. These arms are also 6mm shorter than original but this is of no concearn as this can be dialled out when tracked. The other non branded eBay arms were terrible and during basic testing the centre bush split at less than 130kg. I had some old genuine arms that took 400 kg + at 12 years old. Hope this helps as it is a little project I have been working on over the past few months.
Mark