Quote:
Originally Posted by oil pan 4
Water injection typically lowers the fuel economy on gasoline engines.
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True. Typically it does. But if you can use it to up the compression ratio and ran leaner than stoichiometric even at full load the gains can outweigh the losses. It also needs to be precisely metered in order to maintain an optimum air/fuel/water ratio. The Aquamist system is about as precise as you can find. I could make it work if I put on a Mega Squirt system to run just the water injection. But in that case I might as well as convert the whole engine to fuel injection and at the same time finding a water spray jet small enough for my 1600cc engine would be difficult.
And actually if I were to dump $5,000 into such a water injection system (that's about what I figured) I might as well as make an electric pusher trailer with ultra capacitors instead for the regenerative braking since I do 90% of my driving stop and go.