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## Main Question or Discussion Point

Help explain to me the understandings behind running an iron flywheel compared to an aluminum flywheel (or vice versa) in a street car and or drag car.

An iron flywheel (21lbs for example) will help a car get off the line better from a launch compared to a lighter flywheel (11lbs for example) right? Because of rotating inertia? Kinetic energy?

I assume a lighter flywheel is better for acceleration once a car is moving right?

I have also read of some that swap to an aluminum flywheel have to usually give it a bit more gas feathering to get off the line in everyday driving because the rotating inertia isn't as great. Does that make sense? Does to me.

I read somewhere in a magazine that the diameter of a flywheel (to a point) has more of an effect on the rotating inertia than does the composition of the flywheel? Any formulas? Ideas?

Thanks for any feedback or corrections!

An iron flywheel (21lbs for example) will help a car get off the line better from a launch compared to a lighter flywheel (11lbs for example) right? Because of rotating inertia? Kinetic energy?

I assume a lighter flywheel is better for acceleration once a car is moving right?

I have also read of some that swap to an aluminum flywheel have to usually give it a bit more gas feathering to get off the line in everyday driving because the rotating inertia isn't as great. Does that make sense? Does to me.

I read somewhere in a magazine that the diameter of a flywheel (to a point) has more of an effect on the rotating inertia than does the composition of the flywheel? Any formulas? Ideas?

Thanks for any feedback or corrections!