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No offense but i'm not going to "just believe you". If you would like to explain later that would be great. The reason why I'm skeptical that heavier is better is because heavier could only be better to a point. Make a 100lb flywheel and the mpg would be horrible, so mpg could only possibly increase "to a point" and then begin to taper off. Sure 100lbs or 1000 lbs is extreme, BUT this does prove that heaver is only better to a certain weight. What is that weight, 2lbs, 7lbs, 18 lbs, 34 lbs...ect. ect. ect. Trouble is that ive only seen like 7, 11 and 18 lb civic flywheels.
One reason why racers use light flywheels is to reduce parasitic drag on the crank, just like deleting power steering and an alternator would reduce drag on the crank, thus "freeing up horsepower". Right? Freeing up horsepower should increase mpg because less load is on the motor.
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