Originally Posted by Mike@GTM

That's what we've been saying as well. We even have a video of us removing a fused crank pulley in our Stage 2 Supercharger Press Release thread and have touched on the issues that have resulted from harmonics. We've seen the catastrophic results of running an aftermarket lightweight pulley.

Also, while reduction in rotational inertia does help improve engine response, there are other factors to consider as well...like how long you want your engine to last.[/QUOTE]

Mike,

with regards to above response, would it be true for any kind of rotational inertia like the lightweight wheels, lightweight driveshafts (aluminium or Carbon), flywheels, etc?