Originally Posted by ovekvam
But I guess all steering racks have slower gearing around the center position than the ends. I even had that on my E30. Do you have some link or drawing to show how it works on the F20 with the variable ratio?
BMW themselves are very reserved about releasing detail, other than brief descriptions and their brochure blurb.
What I have read doesn't seem to show anything more involved than a basic variable rack, obviously the software can enhance the working parameters.
ZF material (like the link) just spell out the basics, page 7 shows the gear profiles, how it physically makes a variable rack, and a little explanation. But we certainly are not into new technology, just an enhanced application instead of a fixed rack system.