the afc will NOT trim enough fuel to run 550's. you are probably detonating now honestly. your FPR is 1:1 so you are way short on fuel. it is not the fuel pump that is holding you back most it is the injectors and the fact you don't even have a FMU. where is your timing set at? if I were you I would get a 12:1 fmu and missing link and drive it like that. don't even mess with settings till you get to a dyno. if you are runnin a missing link now you are DEFINITLY detonating. the missing link tricks the ECU into thinking you are at 0 vaccum when you are at full boost so the ecu does give you enough fuel. so this is what you need:

12:1 fmu-100 bucks used
missing link-20 buck used

until you have those 2 things I wouldn't drive the car at all....at least get a EGT gauge and if you are over 800 degrees C I wouldn't drive it.