Originally Posted by
xr2wishy
it's not so much to do with the weight of it, but the rotational mass, i.e. inertia.
you want to remove as much as possible from the outer edge as possible as this is where more energy is used in rotating the flywheel.
it does depend on how you want the engine to respond though.
HOW on earth is the weight not related to the MASS!!.
The rotating mass determines the INERTIA, inertia is simply stored energy, in this case by movement/rotation, this is 100% DIRECTLY proportional to the weight, as a whole.
The flywheels tend to be thinner nearer the edge, do NOT under any circumstances remove TOO much here, although it will have more effect than material nearer the centre, it can also lead to grenading, that is self destruction, and have seen flywheels go through bell housings and into the car compartment more than once, so if your leg happens to be there where it comes through you have no more leg.
tabetha