if its coffing and farting round 5000 u should gap ur plugs down mine r at .7 sum ppl say its to low but when i had same mods my car was doing this and that gap fixd it 100%
also if in doubt about the fuel pump put a fuel presure reg on it and up the presure to say 45 50 and see if that helps with the pinging if not could be shitty fuel mine knocks (pings) if i run optimax but 98bp ultamate it dosent