hey dude

depends on what you want the car to do... There is such a thing of lightening too much. The car will certainly rev faster. But the down fall is the fact that you will loose torque.

Think the flywheel at normal weight spinning at 1000rpm. The momentum will make your car take off smooth. On the otherhand, if you have a lighten flywheel the momentum is alot less.... meaning that there is a greater chance the car will stall if you try to take off normally (at 1000rpm). You may also find that the car will loose power going up a hill so you'd need to drop down a gear.