my 550's are maxed out at 18 psi

[94talonawd]

The fuel filter has just been replaced a few weeks ago. I have upgraded my fuel pump to a 3S. I have a 1g maf, I havent dont anything to it. I dont remember where my afc settings are at. I put them all to 0's for now. But my low settings were at -18%. My BTDC was at 0 degrees when I was running 18 psi on the safc. I tuned it for no knock. I didnt know that my BTDC was at 0 until i purchased a crank pulley from LSE. I put my BTDC back to 5 degrees and thats when I started knocking and put the boost back to 12 psi and put my afc settings back to 0.