If you wanted to put a turbo into your civic sir which is v-tec 1.6 displacement would you have to remove the v-tec supercharger or can you run both and what would be the cost of this project?

Answer 1

There is no suck thing as a vtec supercharger. Vtec is hondas infamous variable valve timing system. Honda Civic SIRs dont have superchargers from the factory unless installed afterwards (ie. aftermarket such as the ones from Jackson Racing). If you have a supercharger installed, it is most likely that you wont be able to add a turbocharger unless you have all the money in the world because it will cost you a fortune to run both. You will run into many problems such as equalizing boost and intake Plumbing.
At one point in time, Volkswagen was testing an engine that was run by both turbo and supercharger but they abandoned the project because of the complexity and the cost to produce such an engine.