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Old 05-05-2020, 02:00 PM   #30 (permalink)
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This probably depends alot on overall engine design. While done for reasons other than MPG, my engine is destroked and has large custom cams and much higher than stock static and dynamic compression; yet it seems to run best/most efficient between 2700 and 3000 RPMs (compared to about 2500 RPM stock). My piston design is kind of terrible for DI, though, so I'm sure that's costing me quite a lot of efficiency; I have yet to implement piggyback PI and/or WMI so it remains to be seen if going to a full time hybrid fueling setup can reclaim any of that.
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