I am in the process of upgrading my fuel system. Right now I have 550cc injectors, STR fuel rail and a PMS. I was looking into the walbro 255 lph pump, Aeromotive FPR, and -6 AN fuel lines in the engine bay, but now I'm wondering if I should go with something bigger. Would a Paxton pump and regulator with -8 AN or -10 AN lines throughout be overkill? I'm going to be running 15 - 20 lbs at the track and low boost on the street. Thanks.

 

factory lines are -6 feed and -4 return, so your minimum upgrade would be -8/-6.

I'd use a Bosch or Aeromotive pump, aeromotive regulator, and the filter of your choice, with -8/-6 if you are planning on making in excess of 450whp

 

Ok, well then should I stay with my bosch inline since I plan on doing the same exact setup as bQQsted??
I thought that there was no need for such a high pressure pump with the use of large injectors like the 550s