Originally Posted by mmdb

I'm currently communicating with Ben from Driftworks concerning his rear knuckles. So far this is what I know.
1. they won't modify their design to work with the z32 rear fork type
2. custom roll center adjustment is a NO and will remain fixed at the height listed.

I got a few more questions asked and I'll post 'em up as I get answers.

Originally Posted by Parts Shop MAX Dan

The limiting factor of how much we can raise the spindle to drop the car seems to be the interaction between the RUCA arm and the axle boot.
Our current RUCA arm is upswept already especially designed for lowered cars so if you even try to do a drop spindle on someone elses RUCA your pretty much [email protected]



we disconnected the coilover and jacked up the wheel all the way to take a look at the most extreme clearance situation:





And then we put it back to a normal suspension compression and measured again





It seems like 3/4" drop spindle is the happy medium because it looks like half an inch is totally safe and 1 inch is the max.
with the half inch subframe risers its already a big difference so this should be a great mod for suspension performance on extra low cars.

If we wanted to take it farther we would have to sweep the arm up on the RUCA more or get a custom slim boot for the axle, but I'm betting as is its going to make a huge difference without going any farther.