CentralCoaster wrote:
My stock units slipped on my 85 with drag radials, but that was with the non-ZR1 plate and non-ZR1 pivot. The stock pressure plate is too shallow, and moves the fork out against the slave in such a way that the slave cylinder preloads it. I believe this reduces the clampling force of the clutch and is also why the clutch engages/disengages so far up, and makes the car a little tricker to drive on the street. I found myself backing the clutch out and waiting, waiting, for that engagement point to finally happen, which is hard to get used to. Other people would find it awkward when driving the car for the first time.

I haven't been back to the strip on my properly working clutch setup.