This may not help, but food for thought.
From what I remember talking to my old pump builder Scott, he did quite a bit of work to increase not just volume but pressure in his builds. With anything in hydraulics as you increase volume the pressure falls. Pascal’s law. So as your pump was built for high volume it’s output pressure is lower. And as the ratio of pump pressure to injector pop pressure lessens, the harder the pump works.
There is a ratio of output pressure to pop pressure, and as that ratio falls the issues increase. Like a guy that max benches 200 can do 150 a few sets, but a guy that maxes 300 can do 175 all day. Yeah the work gets done but the strufgle means it isn’t getting done well.
The builder has to compensate for it. I remember my builder saying anyone can turn up fuel, but much over stock requires either increasing pump pressures or lowering injector pop pressures. I spoke to a few different pump builders since Scott died, but almost all of them start out by wanting lower than facotry injector pressures- Scott said that was the fastest way to tell if they weren’t compensating for the pressure difference when I first met him in ‘92 or ‘93.
My way modified pumps were huge volume, they also cranked out 6,000 psi. But high pressure and high volume meant they were not intended for 100,000 miles. Everytime I blew an engine he went through the pump just to ensure it was good.
I am still stuck on the 2350 pressure from my experience, but in a phone call the other day, a guy pointed out diffence in fuel from then till now. With the alcohol mixed in that really drops pressure as the viscosity is increased.
