I am wanting to add a turbo to my '93 NX2000, and I have looked for info deep into the list archives but couldn't find anything of much use. From what I gather, I will need at least the following: T3 Turbo, stock turbo manifold, intercooler, 3" exhaust, bypass/blowoff valve, 370cc injectors, and an ECU upgrade. Now, it seems everyone says the ECU is a MUST, but a few people have suggested other methods such as a fuel pressure regulator... now, my question is: why exactly does the ECU need upgrading if it is such a good ecu to start with? Won't the mass air adjust everything pretty much? and if not, what will happen without the ecu upgrade? Any input on this appreciated! Thanks!