i think im more inclined to look into getting a supercharger, rumours have it they are easier to fit and they provide instant power all though the rev ranges, no turbo lag. Maybe not such a big BHP increase as a turbo but more low end torque i think(correct me if im wrong!) Which is exactly what the RS200 needs in my opinion
But a turbo is still an option. So if i get a turbo, what other parts are needed engine wise? if i have to start adding to the internals i think ill keep clear and stick to a strap on supercharger. All this is probably wont happen to early next year, so plenty of time to plan it. How much does the Turbo its self cost and what make are you going for Elexes?