Agreed, Sub555 ran a 155 which was kicking out over 200bhp. He'd had some major work done to the engine...can't remember the details but it was almost a race engine!!!David C said:cams and a remap is already £1000.
You will need more than that to get to 200bhp.
PM Marko, he has got his 147 up to that figure but that was after an extensive engine rebuild... = loads of £££.
Fitting a turbo to an old engine without rebuilding it is not a good idea.