The 16 bit ecu is much like the SR20DET ecu and the daughterboards are similar as well. The daughter boards cost around $50each, they have to be properly soldered in, and they require two 27C256 eproms. Some boards require 512k of data to be divided into even and odd and then programmed into the eproms that way. Some of the better boards require two eproms with identical data. I have tuned the SR20DET but not the 94+ 300Z so I don't know the specifics about the Z boards. The emulation problem lies in the dual eproms. This creates a situation where you need either 1 high quality emulator ( the flexrom unirom has a version for this, and so does the EE Tools emulator) or two less expensive emulators (ie 2x romulators). If you have a JWT ecu for the 94+ Z. I personally would invest in a good eprom reader / writer. Read each eprom and determine if the information is the same on each chip or if it is even / odd. From there you can start to modify the code. There is some information on the 94+ code at [ www.925style.com ] This is a free download, it is not exactly easy, but it will get you started. If you can pick up a 90-93 ecu for cheap you may want to go that route.
