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Old 08-29-2009, 03:03 PM   #5 (permalink)
MadisonMPG
Master EcoModder
 
Join Date: Nov 2008
Location: Madison AL
Posts: 1,123

The Geo - '93 Geo Metro
Team Metro
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Quote:
Originally Posted by orange4boy View Post
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.
I think it's 1lb is 3lbs, at least I feel it is that way with tires.
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