I suggest a dyno pull with an Air/Fuel guage hooked to it and datalog it. You should never be over 12.0:1 with boosted engine unless you want to turn it into a boat anchor..... Timing: I'd start with 10 degrees under full load and add until you get detonation then back off about 2 degrees. If you're having spark blow out, it will show up on the dyno pull. You can either reduce the gap on the plug, or install higher output COP setup... Good luck..

85 Runner. (Camo Beast)