Quote:
Originally Posted by Emher
an engine that has more power at low revs, say an LS3, would logically give at least a good a fuel economy as a turbo 4 that has to build up a bit to the power?
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Given really tall gears, the big engine could get close.
Quote:
Originally Posted by jmliptak
More friction with more cylinders and the individual pistons and all the goodies they attach too are generally heavier and larger, so it takes more energy to move them, but I am not an engine expert.
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Nor am I, but I do know that engine friction goes up as a square of RPM...making a high-revving smaller engine lose lots of its advantage when the big engine turns a really tall gear.