As someone who worked with jets using water injection for over 20 years, i can tell you the textbook answer for what water injection does: increases mass airflow through the engine. The B-52G carried 1200 gallons of DEMINERALIZED water, and the boost lasted for 120 seconds. The KC-135 used the same J-57 engines, carried 600 gallons, and it also lasted for 120 seconds. Gave about 6000 pounds more thrust per engine, which was about 30% increase. The fuel flow did increase, and the engine pressure ratio increased by a bunch also. Don't remember what we trimed them to now, but the 135's really screamed, and if you were going to have an engine failure it would happen during water. These engines put 1/3 of the water into the inlet, and 2/3 into the diffuser cases. The F-105 used water injection, and an afterburner, and I don't know of any problems with the burner connected to the water injection. I don't know how our little engines will react to water. Maybe the ECU will just pump in more fuel to put the egt back in the ballpark, but I would be very careful! The fuel controls on the big engines had a seperate trim system for dry and wet thrust. Also we couldn't use water below 40 deg. on the B-52 because of the temperature drop in the inlet. The tanker had water heaters to get the water temp to 70 deg, then you could take off wet down to 20 deg. Hope this makes sense. Remember, demin or distilled water. The impurities in the water would eat the full size compressors.