SmoothCriminal said:you'd need a turbo manifold and possibly new motor mounts but that's about it, the tranny should attach to the 2.3L just fine since they're both mazdas
SmoothCriminal said:the ztec motor would be terrible for a turbo application, the reason is makes so much more hp than a regular focus engine is an increased compression ratio, i believe it runs at 10.5:1, if you wanna do an engine swap, you need to look for a transverse mount 4cyl that wont tear up our tranny with its torque. if anything i'd look for an old mx6 turbo motor, but that car may be rear wheel drive, so the tranny might not hook up