I have a 99 civic si with a built engine running the drag III kit. The only fuel upgrade I currently have is a wallboro 255lph intank pump with the 12:1 fmu. I'm upgrading to 440 injectors. Just wondering what I will have to do to keep fuel pressure at a reasonable level? Do I have to lower my fmu ratio? Is there anything else I should get (fuel rail, fpr, etc)? I will be running 15-16 psi. I just don't have the money for a standalone yet?

Thanks

99 civic si
13.11 at 5800 ft.