Im considering buying a low mileage 172 and getting the conversion done. I know the cost is about £1500 and consists of headwork, manifold and exhaust system along with some kind of induction system to increase air feed. Resultant bhp should be about 200. Is it worth doing and how much would it effect my mpg for general day 2 day driving (getting to work and back ie under 3000rpm) obviously it would drink the fuel once you put your foot down as it pours the fuel and air in.
Opinions required please.....