Over the last few months we have been working in with a very experienced motor sport engineer who has been checking and measuring our zed and advising on improvements and things to try and test etc. One thing he did was plot the toe and camber changes front and rear every 5mm of travel from full droop to full compression. We have also string lined the car to check it is straight as in drop plumb bob and marked and floor at several locations and measured and corrected wheel base and wheel track. Unlike what we thought the camber change is very linear and does not actually increase in compression as per attached graphs which help show this. We did find toe change is less than ideal in front end as under compression if toes out which is good but the opposite side under harsh cornering and under droop it toes in which is bad. We are going to experiment with steering rack heights to try and improve this. The other big improvement was we checked to see if front or rear was hitting bump stops as I suspected it was, and sure enough found with only 100mm of travel from full bump to full compression. With about 30mm of bump stop I only had about 25mm of travel before it hits and stops less a little compression of bump stop. We cut them down to about 10 mm to around 20mm more compression travel which should make a difference. Measurements were taken from bottom of rim to bottom of guard front to rear and rear static height is around 56cm and front is 58cm. Rear is lower due to custom flared guards which sit lower on wheel and is actually close to level with stock quarter panels. http://300zx.com.au/downloads/rear_toe_and_camber.xls http://300zx.com.au/downloads/front_camber_and_toe.xls
