[Charon]

The biggest problem with the v6. And the main reason it's made so heavy is it's design can't be balanced. The rotational mass can. But the firing pulses can't counterbalance each other. The engine actually shakes front to back. Kind of like a rocking chair. This is why they don't feel smooth at higher rpms. The faster you turn it the more violent the rocking becomes. You could lighten up the rotational mass. And the rocking motion would be worse as the speed increased. Its the weight that makes these engines feel half smooth.