Originally posted by Aegon
Flywheel weight would tend to carry momentum, not to add momentum. The only thing that will make revs rise in this scenario is fuel+air. A lighter flywheel will simply rev higher!
Well that's my thought (the mass part anyway). Since the flywheel is being accelerated by the engine, when you release the clutch only the pistons/rods/etc. is acting on the flywheel to deccelerate it. However since there is less mass in a lighter flywheel and the mass of the rest of the engine stays the same the flywheel should deccelerate faster.
Or disregard what I'm thinking because I haven't had physics since I graduated from college.