Min. injector off time

[bruce plecan]

  Well OK, now if someone was to go the 18 #/hr route, where
would one look for how to phase in a second set, of injectors.
Would anyone have a clue about a simple analog somethin
that looks at what TPS/MAP/RPM?
  Or even where to begin looking for a 3 input PWM device,
The drivers, I got a clue on now (chopper).
  I don't mean to beat this to death jus curious how to do it,
as a DIY'er
  Bruce   Anyone got a fan controller schematic for a 
              cone shaped hat cooling fan?