Quote:
Originally Posted by IsaacMTSU
I would assume that if uses 1/8th less fuel to idle that it would use less fuel throughout the RPM range...
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The assumption may or may not be true... that's why measurements are better.
The amount of fuel by itself is insufficient ... you have to know both the real time fuel consumption and the real time power output at the same time ... if power output drops to 1/10 while your fuel use dropped to 1/8 you are less efficient and more wasteful ... 1/8 the power from 1/8 the fuel is no improvement at all in efficiency either... real world variables change too much too easily ... that is why people use controlled conditions like Dynos inside a building to produce a BSFC chart.
If you are using to fuel sources such as gasoline and Hydrogen ... to make an accurate BSFC chart will require measuring both of those input fuel sources in real time ... while also monitoring the real time power output from the system under controlled conditions ... the best controlled conditions are those of a 3rd party , to avoid bias.