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Old 08-29-2009, 01:38 PM   #4 (permalink)
orange4boy
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Join Date: Aug 2008
Location: The Wet Coast, Kanuckistan.
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The Golden Egg - '93 Toyota Previa DX
90 day: 31.91 mpg (US)

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90 day: 57 mpg (US)

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Flywheel lightening is a standard mod in racing and it translates to better FE. I did it on my VW bug and the thing revved up MUCH quicker and gave a seat of the pants acceleration increase.

It's similar to reducing the weight of your rims but more effective because of the gearing. Rotational mass reduction in the drivetrain is usually a good thing. I can never remember the ratio but one pound of rotational mass is worth several static pounds. If you are a good stickshift driver, you won't notice much difference in a manual. Idle may be a bit more lumpy though.
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