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If we go back to straight water injection for a minute and let the combustion temp create the steam. How much pressure would you need for good atomization? Would 100 psi wih a decent nozzle do the job? With my lpg now, I don't need a pump. I use a bbq regulator and an orifice from my stove conversion. Hobbs switches trigger solinoid valves to give me stages (3 stages at 5 psi intervals now, soon to be 5 or 6 stages). I would think stages would be a good idea with the water too. I fumigate the lpg before the turbo on the suction side. I think with water, I'd prefer to inject it after the turbo. My boost goes from 0 to about 32 psi at wot. 100 psi should be plenty to inject it into a 30 psi stream. 200 psi might get better atomization though.
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