Pre-Turbo Water Injection Works!

[Navybluesubaru]

I have had a dual water injection system for a long time. My current setup was a 1gph nozzle activated via a 7psi pressure switch, and then a 2gph nozzle that is controlled via the UTEC spare solenoid output on my 02 WRX. Both were mounted about 4 inches before the throttle body. After reading about this pre-turbo injection, I decided to go for it. Today I moved the 1gph nozzle (Hago M1) to about 2 feet before the turbo instead of right before the throttle, where the 2gph nozzle still resides. I went out for a spin and the car pulled like mad, I was actually almost scared how fast it was. The turbo whistle was a little louder and the car seemed to pull a lot harder. I datalogged the whole thing and observed the results. I cannot say for sure if the mass increased, because my MAF voltage is only read to 1/10 of a volt, and I would need 1/100 to see the diff between 4.55 and 4.64. It was reading 4.6 volts, the same as before the mod. I am comparing my runs from 6:20am to these new runs at 7:15pm. I dont have positive proof, but from the seat of the pants, it felt a lot stronger.

Jeff