BMW Rallying Forum

Could anyone please tell me how and where to strengthen E30 radius arms. Pictures would be good if possible. Thanks

Pick-up tab for the anti roll bar drop link needs reinforcing. I used a bit of 30mm channel welded underneath and gusseted to the arm structure itself.

You can replicate the GrA / Z3m reinforcements by welding a brace across between arms near to the pivot points to create an 'A'. Also add a gusset to the wheel bearing area to transfer load towards the spring seat.



Another point to brace is from the underside of the shock mount up to the arm itself.

If you are running rear coilovers you can brace from the wheel bearing area to the inboard pivot (but this cuts right across the spring perch).

Lots of info in here: http://members.optusnet.com.au/sashamansour/BMW/5-Lug%20conversion/E30%205%20stud%20e36%20brake%20conversion.doc


Check out the 3 links in here too: http://www.e30m3project.com/e30m3performance/tech_articles/misc-tech/index.htm

Many thanks Ultegra.