I would rather find a way to increase the pressure of the fuel, say 15%, and drop down one fuel injector size in a quest for better atomization. Fuel rails are typically sittin on top or against a hot engine, and are hot enouh to burn on touch once the engine has been running a while, so I dont think much can be had there. Some "kits" sneak out a tiny bit of fuel and let it turn to a vapor.then let it get sucked into the engine but again the ecu knows all about it and I doubt I would see a change there either.
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