I just installed headers, y-pipe, new cap, rotor, sparkplugs, wires, & oxygen sensor. My other mods are in the sig. Anyway, my fp setting is at the lowest. I know that the LO3's normally run rich from the factory. Is it reasonable enough, to now increase the fuel pressure alittle?

 

Its at the lowest? If thats the case you're only running like 7 psi of pressure! Stock setting is near the middle, at least on mine it was dead middle. With your mods I'd put it just a little above stock. Get WinALDL if you can to find out what your o2 sensor is reading then adjust from there.