a new FPR will stick wide open due to crazy pump flows and pressures.
and the return line will be at 100% all the time. out of controls
why not put a 60psi line regulator in front of the fuel rail.
so the FPR can do its job.
the FPR adjusts the fuel pressure so the injector injects the correct fuel at idle and wot.
at zero vacuum (WOT) (1 atmosphere) the plenum pressure is max, the FPR raises fuel pressure to compensate for that WOT condition.
this makes the ECU job of calculating fuel rates 10s more easy.
(this magic holds injector differential pressures constant) (air side to fuel side) for super easy fuel calc's.
now begs the question?
was the ECU tuned with a dead FPR or not?
oops.
some folks just run a constant fuel pressure and do complex ECU tuning. (can be real hard work)
others put fuel pressure sensor on the rail and use that for all fuel injection rates. (like new cars have , no return line)
lots of ways to run a fuel system....
and the return line will be at 100% all the time. out of controls
why not put a 60psi line regulator in front of the fuel rail.
so the FPR can do its job.
the FPR adjusts the fuel pressure so the injector injects the correct fuel at idle and wot.
at zero vacuum (WOT) (1 atmosphere) the plenum pressure is max, the FPR raises fuel pressure to compensate for that WOT condition.
this makes the ECU job of calculating fuel rates 10s more easy.
(this magic holds injector differential pressures constant) (air side to fuel side) for super easy fuel calc's.
now begs the question?
was the ECU tuned with a dead FPR or not?
oops.
some folks just run a constant fuel pressure and do complex ECU tuning. (can be real hard work)
others put fuel pressure sensor on the rail and use that for all fuel injection rates. (like new cars have , no return line)
lots of ways to run a fuel system....
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