Fuel pressure WOT. Over flow valve. Boost referenced

[rebar]

After changing my fuel filter, strainer, deleting heater and changing out my overflow valve a few times I still have what in my opinion is sort of low fuel pressure.. Sort of means what Iv read is all over the map.. Some say 30 psi and no higher than 45. Others are running 50 and so on. But you don't hear much about WOT pressures, just stationary driveway testing.

What should the fuel pressure be for a 215 p-pump WOT? Mine drops from 24 psi at 60 mph 2200 rpm, to 16psi shifting into 5th WOT 1500 rpm. Pressure slowly increases with rpm back to 22 psi WOT 2200 rpm.

Id like another 10 psi so that my pressure is over 25 psi at WOT, but its just my opinion and Im doing better than when I first realized my idle pressure was 13. Does cummins have any guidelines on WOT pressures and for those of you with gauges, what are you dropping down to when you shift? And has anyone installed a boost referenced regulator? Do you delete the overflow valve regulator and install the boost referenced in the return line?

Thanks!

 

[GAmes]

Fuel pressure requirements are on page 14-81 of the '97 FSM. I can tell you for a fact that the engine will run and pull a trailer through downtown Salem, OR stop and go traffic while pumping massive amounts of fuel out the top of a broken fuel filter housing.