thanks Tere, so having 355 or 360mm front disks with 6 or 4 pistons at the front with the standard disks at the back 2 pistons but uprated brake pads should be okay
According to the tests, a stock Z is slightly front biased. With the StopTech 4-piston front and 355mm rotors, and stock rear, it becomes a little more front biased, but nothing the ABS can't handle (still passes the J turn test on the skidpad). I wouldn't track your Z until you upgrade the brakes all around -- the stock rear rotors are tiny and will overheat quickly, shifting the bias extremely far forward. For the street though, the unbalance is workable.
What I like about StopTech is that they thoroughly test caliper/rotor combinations, so you get perfectly balanced brakes at all four corners. Originally, I was thinking 6-piston front and 4-piston rear, but as I got into the reasearch, I found the difference to be nil with my 4-piston front and 2-piston rear setup. What I found was the 6/4 setup was more show with no significant functionality (the master cylinder is the limitation). My setup will stop the Z 60-0mph in a little over 90 feet which is almost 20 feet shorter than stock (good pads AND tires are also keys). My setup is also better than the Z models with Brembos in balance, stopping ability, and track performance. The StopTech kit originally came with Axxis Ultimate pads which were absolutely horrible (poor modulation, noisy, and very dirty). They went bye-bye in two weeks in favor of Hawk HPS which I consider the ultimate street pad (not for track).
Wow thanks Tere, but for someone who will be doing the occasional track and street, what pads would you recommend. Also if you dont mind me asking, how much did the stop tech brake kit set you back