With the throttle <20% open we see vacuum in our manifold....see attached chart.
So our injectors are seeing anywhere from -10psi all the way to +16psi (Code365mm).


With a set fuel pressure of 56psi the stock 440cc (@44psi) inectors therefore have anywhere from
.....(56-16)=40psig ....less than 440 at WOT
.....(56+10)=66psig....more than 440 at <20% Throttle
across them.


I'm guessing the ECU fuel map takes care of that spread with some help from the O2 probes and STFT....can someone help me understand this a bit better?