Aluminium Flywheels

It would seem to me that on launch, spinning up a heavy steel flywheel will definitely HELP get you outta the hole when you dump the clutch, but...as soon as the clutch pedal is all the way out, now the engine is fighting that heavy inertia as it's revving up. So, to me, it's sort of a double-edged sword. And also, IMO....the only way that heavy flywheel could help you BETWEEN shifts is if you're screaming the engine (pedal to the metal) while you're shifting. I say go aluminum.