I am building an engine with shorter pistons and longer rods + BD16 inlet and GT30 turbo etc.

On a setup like this, would it be a good idea to fit a lighter flywheel, or would it result in a big loss in low end torque? I have seen burton power has some really nice ones. Take this for an example:

http://www.burtonpower.com/parts-by-...-yb/sc252.html

It is not as light as they come, but still pretty lighter than the standard one.