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The Palouse North Idaho | For a given engine cycle, ie the same compression ratio, power is proportional to air flow which is proportional to the displacement. Same is true for turbo'ed engines same compression ratio and same boost pressure, the bigger displacement engine will produce more power. As far as specific fuel consumption ( gallons/hr/hp) with the same engine cycle, bigger engines will be slightly better than smaller engines because the effects of air flow friction in the inlet and out let passages of the engine are less in a big engine compared to a smaller engine. It's a function of the Reynolds Number . | |
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Fuel usage per Horse power gal/hour etc
