Also one other thing which i get confused. With the higher presure fuel pump, using the same fuel map, in same engine, does it mean it will run more rich? Doesn't the fuel regulator independently control the fuel presure goes into the injector or the fuel regulator only add a bit of presure on top of the fuel pump presure? Or, the injector flow rate has nothing to do with fuel pressure at all but only the injector max flow rate times opening time?
I asked because when I'm using other map with a stock 20v I notice that I need to decrease a fair bit of fuel in order to make the car runs good, which the map has been used by many other 20v user and most of them were runing good(you know the map that had been floating around for years).