Akfahad wrote:what kind of "minimal gains" are you talking about cdssolara, just so i have an idea of just what the flywheel will do?
The reason for going to a lighter flywheel is that is has less rotatating mass than the stock flywheel. Therefore, it takes less power from the engine to make it spin, so you should be able to rev, and accelerate more quickly. The downside is that the heavier stock flywheel stores more energy, so it's a little smoother at idle and requires less rpm to launch. Since I've had my aluminum flywheel (it's a Fidanza), I notice that my car does rev a little quicker, although it's not a huge difference. I also notice that it doesn't launch quite as well, unless I get the rpm higher than I needed to before. I haven't noticed any rougher idling, so that's a good thing.
Bottom line is that it is a good mod, especially in combination with my supercharger, since it gets me to boost more quickly. If you're already planning to upgrade your clutch, it's a nice additional benefit. I would never just add a flywheel as a stand-alone mod, though, unless I could do the installation, myself. The cost of the installation, in addition to the part, is not worth the gain, in my opinion. If you've already had the tranny dropped to add a clutch, though, it makes sense to add the flywheel.
Hope that made sense.