Just double checked my timing today, but I'm completely stock except some cooling. WOT puts me in mid and high teens for timing. Average ~16 or 17, maybe hit about 14 at the lowest while WOT.

You gotta get that 5 and 0 figured out! Are you monitoring knock with anything?

EDIT: Oh yeah also, make sure the timing points you are questioning aren't shift points. Timing is gonna hop around for the split second the car is shifting,