The Transtronics ROMulator is a ROM Emulator. It can be programmed with just about everything you could want to put on a 28 pin EPROM (Learn about EPROM here). What exactly would you want to emulate with a device like this? How about the code and parameters an ECU uses.
BEFORE YOU CONTINUE, read this page for a basic overview:
Things you will need to use a ROMulator on a Z31:
Things you will probably find very helpful for tuning/modification of the code:
Ways to mount your ROMulator in the car:
Please Note: At this time, actual power tuning past very far installation is beyond the scope of the information I am providing here. It's simply a matter of opinion that I should not share every last bit of information, but you should be allowed to learn for yourself by reading and using the provided software.
Socketing the ECU and installing the ROMulator.
88-89T ECU:
Remove the "front" of the case:
Daughterboard removed, EPROM circled:
The hardest part is removing that chip. I would highly recommend finding someone with a quality solder sucker that you can pay to remove it (or pay to use their solder sucker as I did) and install a 28 pin press-fit socket in its place:
Pocket romulator (Rom Emulator www.xtronics.com; you need model 1, not model 2!)
Installed (note ribbon cable is actually plugged in backwards; don't do that):
Bend resistors on daughterboard (turbo ECU only) to clear cable:
Bend ECU case to clear ribbon cable:
Load a binary file into romulator using transtronics software to test (note: either ECU has to be powered or ROMulator disconnected from the ECU to do this, it will not work otherwise as the ECU will try to pull power from your ROMulator):
Use a PC to change settings and update romulator as needed using Live Edit:
That's it, good luck.