Coil strength plays a huuuge part on gap. On my Miata, that I supercharged last week, I had to close the gap from 0.040 to 0.030 and it's still not enough to prevent spark blow-out (misfires above 4800). I'll probably end up at 022-027 before the misfires go away. With toyota coil over plug (COP) It's common to be able to run stock gap or even bigger.
__________________
|