RSX Fuel Pump Upgrade Question

[ares650]

what would happen if i just installed a Walbro 255 pump into the stock location. i have heard that a few CN guys just run an inline fuel pump without a return. Now, because of the larger fuel pump, will the fuel pressure raise, or will it stay @ 50psi? Also, if the fuel pressure stays @ 50psi, and i have a larger fuel pump and i can flow more fuel why should i even care about running a return line?? I don't understand why I would go with an aftermarket FPR if a pump can flow more @ lower PSI's. I understand that your fuel persure needs to be higher then your boost for the injector to fire fuel into the intake. But the only gain I see is to set your FPR @ 35psi and tune your car their. But when the car goes into boost it will see (35psi(base)+10psi(vac)+15psi(boost)=60psi, and your new setup would flow less then a 50psi setup. Do you see my ponit?
http://www.autoperformanceengi....html Goto where it says intank technical.