In summary; All US model Mazda Protege's featuring the 2.0L FS engine have the same CR. 9.1:1
The compression on the MP3 is the same, but the timing is far, far advanced, so without an EMS to control timing, or the more 'casual' timing of the P5 style ECU, plus fuel managment, you're going to have a time of it, unless you limit boost to about 4 psi, if that, depending on the turbo you use.