Seems like a good mod to try. I'm already doing lpg fumigation with good results. I have 3 stages that key on boost pressure. I'm going to add a few more stages. I think you would need high pressure and good nozzles to get the best atomisation you can. Big drops of water wouldn't help much. If you drop the combustion heat with water, you pobably increase the hydrocarbons in the exhaust and reduce the nitrogen oxides.
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