as far as water injection goes, i had already planned on using it, the whole intercooler thing was just an idea.
with efi...i would love to use efi, but i really dont have the money. im trying to do an very low budget buildup and if i want to use my money to have good engine internals and quality turbo components efi just isnt in the question at this point.
with the blow off valve venting air and fuel, thats easy... im going to vent it back into the intake of the compressor.