im currently building a 2.1 zetec turbo that will run about 350bhp wen mapped up al in al wiv out having the pectel t2 mapped it would'v cost me about 3 grand (£600 for the map at grove garage, amhed bajoo) not bad at al considering a focus rs engine wiv 212bhp will cost 2.5k-3k.

theres alot involed in it than u mite think so if ur after a simple fix buy a focus rs engine save u the hassle.

my price of 3k is building it myself wiv my best m8 who just happens to builds engine's so the build it self's cost's nothing, if ur not building it ur self then budget a hell of a lot more.