street car. The forged steel ones are much stronger and the weight penalty is slight. Over on the 7 series e32 board there have been posts of broken aluminum arms in the past.




Quote Originally Posted by John 535is (Sydney)
I decided a long time ago to stay with Lemfoerder, and why I ended up buying most stuff from BMA and frieghting it to Aust. Over here there are all sorts of odd brands.
Unfortunately Lemfoerder make both Aluminium and steel. I checked your site Bruno, and there is a comment about the aluminium arms, but no information as to why we should or shouldn't use them.
If lemfoerder made the top arms and other parts in Aluminium I would understand the unsprung weight theory, but it seems odd to only have one part, and becuase its a control arm, actually only half that is technically 'unsprung'.
Have you tried the E31 arms with the different bushes?

John