From my understanding, (not saying its true) I heard on bigger injectors, like 5x.018 vs 7x.015 the 7 holes perform better on a 12mm pump cause they keep pressure up for atomization?
Hopefully smokem can comment on that, im going to finish the year with a 12mm pump. I think were going to try a 13mm pump on dads truck for sure next season and go from there. You have a 13mm on yours murph? Or you were going to one I think I read?