Quote:
Originally Posted by lucid
While we are on the M3 vs LS3 engine topic, I've been thinking about the following lately:
If both engines (engines only) were run at the same power output, say at 100 hp, 200 hp, and then 300 hp, which engine would consume less fuel and how would consumption differences between the two engines be affected at different power outputs?
In other words, which one has the higher thermal efficiency, and how does thermal efficiency change over the rpm range? I am assuming variables like compression ratio, volumetric efficiency, friction, mass of reciprocating parts, combustion characteristics are all influential.
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There may or may not be SAE papers which could shed *some* light on the subject (available for some $$), but I'm wearing a big "EMPTY" sign on my forehead at the moment.
Bruce