Sigh...
The Bosch 0280155831 is a Bosch EV6EL style injector that can run on systems pressures as high as 8 bar (116 psi). Running them at 60 psi (just over 4 bar) is not a problem in any way shape or form.
Again, the spray pattern is improved at 60 psi AND this reduces the duty cycle which was said to be at issue.
https://www.bosch-motorsport.com/media/downloads/injection_valve_ev_6_datasheet_51_en_2775912459.pd f
I'm done....