Here's another point of reference for 0-60 mph and 1/4 mile times for the Z -
2009 Nissan 370Z (Automatic) 0-60 mph 4.5 Quarter Mile 12.9
I'm sure this was under ideal conditions. For the sake of testing you should have a clean baseline with all parameters documented and subsequent tests conducted in the same environment using the same strip of pavement with one upgrade done at a time.