case 555), refers to how much an injector will flow at a prescribed psi (in this case 43.5) at a prescibed duty cycle (I think it's around 80%). As I noted above, raising the pressure (and the commensurate flow) is only useful if you are going to raise your base rate (ie. raise the base flow from a 3 bar system to a 4 bar system. I did this on another boosted car as I had "run out of injector", so I raised the base rate, essentially making bigger injectors. That's where your info regarding more psi and more flow comes into play). Hope I haven't confused the issue, Mark