Dan GSR

I already know the front McPherson becomes more positive under compression. How about the rear? Does the rear increase neg camber under compression?

sl951

In general, both front and rear gain more negative camber if lowered (compressed).

As you lower the car...
The McPherson front gains negative and toes outs.
The multi-link rear gains even more and I think toes-in..

nwGTS

Yes rear toes in on compression to prevent over rotation. They started this with the kinematic toe on the air cooleds and further developed it on the 996 platform which is similar to the 997s and 991s

Dan GSR

That information is incorrect. McPherson will become more neg until the control arm is parallel with the ground (which is not much distance), then it becomes more positive.

sl951

yes - but I'm referring to the 'working range' of the 997/996 system where most folks will lower from an OEM standpoint. Not the extreme end of things. It will go negative before positive starting from the OEM setting. If you tried to lower the car to the point where it starts to go positive (extreme), you'd probably run into clearance issues and certainly have steering rod (bump issues). Ideally if you lower the front, you'd want the control arm angle to remain OEM and have the entire front assembly system move. However, with our street system, 99% of the folks lower within a 2" range; the front goes negative first.

Dan GSR

I'm not taking about static camber, I want to know what the rear does under compression dynamically