I think one of the few standalone engine management systems specifically made for the Z34 will be out soon by Haltech. Others are just reflashes from Cobb, UpRev, Technosquare..
We'll have a few more updates on ecu's within the next 6 months. Controlling the VVEL & CVTC are the main concerns that I have. We're working on a few Nismo 370z's right now... Keep checking this forum for updates: