cant believe so many people hav so much trouble, i have a very light flywheel and would not swap it for a heavy one ever, all the problems you have with the take off is driver error simple as, because these flywheels are usually used with competition clutches , they dont slip, where as your old 10" clutch or what ever you were using actually had a load against it - the big fook off dead weight of a flywheel.

the characteristics of my engine are way more enhanced with a light flywheel and small diameter clutch. if you use a twin plate with organic plate rather than cerametalic , it would be a whole differant ball game, but thats not why we (cosworth (( big torque)) people) use them - we dont want slip, but most peoples clutches are never specced with the engine as they should be, the torque rating should be taken into account when the clutch is built, not ' well i have 400 lb/ft so , ill order a triple plate 5.5" cerrametalic rated to 900 lb/ft'