hello there, get on the RS2k form all the info you will ever need about the cars and all mods, doing a turbo conversion on my one, engine has been built for for 500+bhp and has cost me around 8k so far. im from bas to. a chap called James on the RS2K has done a good turbo 2.3 conversion for about 2K pushing 200bhp with loads of torque,
zetec engine is far more turbo friendly cost wise but if you want to be diffrent the RS2K lump is a very strong and can take a beating all day long