Quote:
Originally Posted by ChopStix
I'm no expert, but I would think that it would take less power to turn the aluminum at the same speed as a steel one, which should have a tiny mpg benefit. I'm not saying just that one change would equal 1 mpg. But maybe if it was combined with some other mods it might show a measurable benefit.
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It will take less power to accelerate a lighter mass. Keeping it spinning at the same speed there will be no difference between the two. His benefits will therefore be noticed more on take-off and/or stop and go traffic.