The only thing that helps you pull it off without too big of a hit is that Eaton M90 setting on top of your engine, if it was'nt there it would be very noticable to you and you would be singing a different song.
I cannot disagree with that at all. The spinning M90 provides quite enought rotational inertia, along with the, still quite heavy, pressure plate.
But to say that it makes NO difference is not true and that dyno you spoke of will prove it.
This is correct, switching to a lighter flywheel does indeed make a difference, Engine output is increased, as I said across the band, from idle on up. All that is given up is the capacity to store energy, and the SC does not need that excess capacity in my opinion. The mass of the flywheel does not produce torque, the chemical reaction in the cylinders does. Giving up the mass does not give up the energy produced by the engine, it just gives up the energy stored. Once the clutch is released stored energy means nothing, what is moving the car is energy produced. More of this energy is available to move the car since it is not required to accelerate the spinning mass of the flywheel.
No driveability is lost whatsoever. If Deep6 happens onto this thread he can comment since he drove my car a bit at Carlisle just after I put the lightweight in.
I beleive last year some magazine did some testing on lightened flywheels...Maybe Carcraft. They dispelled the rumors of lost torque. maybe it is online somewhere.....
It would be nice to see a specific before and after dyno test on an SC, but I can't do it. I no longer have a usable stock flywheel, and I don't know if I would be willing to go through the work of swapping out flywheels, and pay for two dyno tests to prove a point...