When the engine in on boost, you can almost guarantee all injected liquid will end up in the engine. If you are injecting a large volume of waterdue to lack of intercooler, I think you should consider port injection.
In-cylinder cooling is more important. Wi has great effect on the intake stroke, cooling down the inlet valve and hot cylinder wall after the exhaust stroke. Port injection will greatly improve volumetric efficiency of your engine. If you are concern with block jet, use a bigger jet but control your water flow with a PWM valve.
It is not essential to have atomised water with port injection. The latest Subaru WRC car (during development) uses straight jets. It uses a 0.3mm straight jet without atomisation, pointing directly at the inlet valves, result was good better than manifold injection.
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Richard L
aquamist technical support
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