Diagnosis needed... (also Bosch fuel pump specs)

[DemonTSi at aol.com]

In a message dated 97-02-19 23:25:17 EST, you write:

<<  Car is a BMW 745i (3.5 liter turbo) with 3.0 bar (43 psi)
 nominal pressure, running 15 psi boost (hence 58 psi fuel pressure),
 two extra injectors with a homemade 8748 controller, and a small
 nitrous setup (one 40 hp nozzle). >>

What is that additional injector controller like? What kind of inputs does it
use? Can you please tell me more about this unit? Thanks..