Quote:
Originally Posted by ProDigit
But the smaller engines
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So using your logic a 650cc engine running at 6hp will always be more fuel efficient than a 125cc engine running at 6hp. But in reality this is not the case due to the increased heat losses in the larger combustion chamber and the increased pumping losses due to the throttle being closed more with the bigger engine. The first thing for you to learn about here is the concept of Brake Specific Fuel Consumption versus rpm and load.
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https://en.wikipedia.org/wiki/Brake_...el_consumption
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