I think I have the understeer problem pretty well sorted out now. After originially installing the springs I ended up with a bit of positive camber which was the primary cause of the understeer. I have since installed adjustable lower control arms and slotted the holes on the strut tower brace to end up with 2.5 degree camber. I think the camber is about right now and the car handles much better. I would like the car a bit lower and a bit stiffer on corner entry so I'll probably go to coil-overs down the road. For street use the suspenion feels perfect to me, I just notice the short commings on the track.

To John's point above, I agree that you should build track experience before modifying your car. I know I will shave far more off my lap times with experience rather than car improvements, but I'm a gear head and live for improvements. The primary function of my Z isn't just to race but to have fun modifying it. Plus, I would look pretty dumb drinking beer in my garage every night if I wasn't wrenching on something

Here are the pics of the ride height on my Yellow Z with the Tokico 5 way's and the Eibach springs. I cut one lower coil on each of the front springs. This is exactly what I was looking for in ride height. I can slide my hand between the top of the tire and the fender well on both front and back. The wheels are 16X7 Panasports with 205/60/16 Yokohamas. The car handles great...I love it.

Nice, I have the same setup and thinking of doing the same thing. Did you cut a coil off the top or bottom of the front eibachs?