does any one know if u can have the ecu chipped on a 280 zx?

Yes, and "no" it's a stand alone, old school unit. Think vacuum tubes versus solid state tech. one is as is , the other can be modified

Think 1984 commodore 64 verses modern computer.

If you want tune-ability, by a megasquirt.

I'll bet you can "adjust" an ECU, if you had the schematic, an EE degree from Nissan, some electronics parts, and some guts. Other than that, the best thing that you can do is to make sure the sensors are operating perfectly, and the connections and wiring are perfect.

You need to think "1980's" when you fix your Z or older ZX, which is before engine controllers were microprocessor-controlled. If a service tech tells you they can program it, they they are lying, or don't have any idea what kind of car you have, and most likely only knows about the newest stuff, thinking an old "Nissan" is like an Infinity. BTDT.

Camouflage-

C64 computers share much more sophisticated than one may think. For what they had, they were on par with the early PCs. The anology is closer to transistor radio - Pentium I.

thx

I recall reading somewhere that it is doable but my thoughts are unless you plan on doing other mods to it, leave it the way it is since it's designed by the manufacturer to work just right with the stock set up.

Jim Wolf Technology used to modify them but other modifications to the sensors, switches, etc. were also necessary.

there are certain cheats that ar done, like using fixed resistors to replace temperature sensors, but only for temporary use. Everything (coolant temperature, air flow, etc.) is constantly changing during ordinary use, so it's of little use for street driving.