E32 Suspension Thread

[m60power]

This is indeed the case. Stock front rates vary between 17 and 27 N/mm (518i and M5, respectively). Non-SLS rears between 29 and 40 N/mm (525i and 530iT, respectively).

A sample of actual meaurements I did:
E34 530iT front: 6.5 total coils, 5.9 active coils (best guess that fits data), 13.5mm wire, 153mm* coil, 385mm free length, rate at G=77 19.96 N/mm
E34 525iT front: identical except 13.2mm wire, rate = 18.13 N/mm
E34 530iT rear: 9.9 total coils, 8.9 active ("), 12.85mm wire, 103mm coil, 345mm free length, rate 40.25 N/mm
E34 540iA rear: 10.25 coils (9.25 active), 12.2mm wire, 103mm coil, 369mm free length, rate 30.79 N/mm
E28 528e front: 7 coils (5.8 active), 13.1mm wire, 144mm* coil, 345mm free length, rate 21.79 N/mm

*most E34 front springs are 144mm coils at the ends, but bulge out to 153mm or so in the middle (active) coils. E28 front springs, as well as E34 Eibachs, are a constant 144mm coil diameter.

Thanks for posting this. Great info!

[m60power]

Has anyone tried US e34 M5 front springs (non EDC, p/n 31332226287) on an e32? If so, which e32 model and how much did they lower (or raise) the car?