...forgot to mention , built in EGT, Wideband O2, and dataloger.
you where right to chose to install a standalone ECU because they usualy have lots of AUX input and output channels that can be used to perform tasks like boost controll and water injection as stated in your post above.
and...
hello,
as far as the ECU goes since the car is 1988 the electronic only controll the engine, no ABS , all of those fancy electronic gizmo's. not even shure if the car has A/C.
i would suggest getting a standalone ecu called VEMS http://www.vems.hu/
its cheap, it can drive any kind of...