i have got a track s2 which i have fitted with big brakes /coilovers /polybushes / rollcage/ now im at the point to tune the engine or fit something else. i dont know what to do do i keep with the cvh or go for a zetec turbo. i have 4-5 grand to spend and can build the engine myself all i want is something that will take alot of abuse as i go to the ring for 2 weeks a year. any suggestions with ideas and prices will be appreciated.