With regard to a lighter flywheel putting less strain on the crank:
How does the small change in twist/strain due to changing the flywheel compare to the amount of strain generated by the simple act of engaging the clutch and moving a 3000# car?
I mean yeah, there is a change but so what when dumping the clutch on a fast take-off is what the engine is designed to do and must generate a tremendously higher amount of strain.
So I ask is this truly worth consideration? It's like telling someone that the distance to their house is 4.54781 miles!
Lighter mass = more acceleration to the wheel and quicker rev's are the only benefits worth mentioning I think.
warmonger
Former owner of '99 CSVT - Silver #222/2760
356/334 wHP/TQ at 10psi on pump gas!
See My Mods
'05 Volvo S40 Turbo 5 AWD with 6spd, Passion Red
'06 Mazda5 Touring, 5spd,MTX, Black