I was at the dyno the other day trying to go up on boost on 57trim turbo. I have the Walboro 255, Fuel return kit, and 750cc injectors. I set my idle fuel pressure to 58. When i go on boost, my fuel pressure isnt moving from 58. The dyno people told me my fuel pressure regulator was messed up, i bought a brand new 170$ fuel pressure regulator and same thing. Is this the limit of the walboro fuel pump? or Is there a fix to this? How bout the mopar fuel pump, it says its rated up to 75psi of fuel pressure?

 

mopar one is a 190lph pump but can handle a higher pressure. stick with the 255, better flow.

are you sure that there isn't an issue with the fpr? sometimes they can leak out the back fitting and cause a issue with pressure. you also might be having an issue with the "bottleneck" in the fuel system. realtune has a fix for that....

 

hows the process with installing the fuel pump. Easy or a pain in the a--?