i dont think that is right a standard pump in good condition will flow about 3.9 litres a minute and grey injectors will only flow about 2 litres a minute so why do you need a bigger pump??
so if your correct.you could run 750cc injectors flat out on a std 2wd pump
i don't think so
a cossie pump will probably move that amount of fluid off of the car(if its new and you get the amps to it), however, you have a fuel filter, frictional loses down the lines etc all to reduce its volumetric efficiancy
your car, your engine, your risk......for a couple of hundred quid, i would rather know my engine is getting all the fuel she wants
Pugo