Well, that's a rough way of tuning at best, especially if you have no wideband. I'd be willing to bet that you are often running in the 10:1 AFR range. You NEED a wideband O2 sensor.
If I read correctly, you have your base fuel pressure at 19 lbs? That's going to make for a HORRIBLE spray pattern and tons of un-atomized (read unburned) fuel.
It's hard for me to say what you should do because with some random MAF and huge injectors thrown on the motor, anything could happen. I can tell you this though, you are going to want to get some real management on there ASAP. Engine management is the ABSOLUTE #1 MOST IMPORTANT part of a high performance build, and because tuners are expensive and most don't understand engine management, most convince themselves that it's not that important.
It looks like you made a wild shot in the dark and hit a solution that doesn't grenade the engine, but i'll bet it's washing down the cylinder walls, putting soot on everything and if you have a cat, it'll be dead soon.