I was talking with my son tonight, and according to him, all the new toyota's, and dodges pulse width modulate the fuel pump itself to control fuel pressure. If a 747 class ecm had a spare PWM output, is it possible to write a routine to control fuel pressure based on load and rpm? No more adjustable fuel pressure regulators. Just putting this out as a discussion item. What does everyone think. My 355 build will require #80 injectors at 20 psi or #61 injectors at 34 psi. How nice it would be if you just told the pump how much pressure to supply (like a vacuum referenced FPR except much more accurately).