Why doesn't anyone make a near-normal weight single mass flywheel?

[JoeFromPA]

JFP -

Thanks so much. That is exactly the type of information I was looking for...

I'm guessing that Porsche uses a metallurgy in their crankshaft that allows them to break under such stresses. This isn't a criticism; they designed the crank to be used with a specific flywheel and provide longevity.

Perhaps it is the specific application of a solid-mass aluminum+steel flywheel that's less than 1/2 the weight of the stock dual-mass flywheel on this particular crankshaft....I haven't seen/heard cranks breaking as even a concern when switching back and forth between single mass/dual-mass on an otherwise stock rotating assembly.

Reading Jake's comments, I understand now why a vendor hasn't chosen to develop a 25+ pound single-mass flywheel for these engines. It's just not a choice they want to entertain, given the available options.