At 9 psi, I'd question stock injectors. If you are putting a new 15G kit on, it comes with RC 310s (or 330s?) and the E-manage so you're all set.

You also have to realize that even with a fatter fuel pump, your injectors are still only going to push out what they were made to push. Just because you have more going to them, doesn't mean that they will spray more fuel.

I say it's easier to lean out rich injectors than it is to try to push the limits of lean ones.

Tell me more about this kit.