Maybe u can check with the members in the forum thread Mitsubishi, 4G93.
They may answer your question there..
p/s: As my experience, the proton model with siemens ecu is disaster, because the ecu is already fixed, cannot been modified or adjkust using any piggybag (SAFC). If the intake manifold sensor there sense more air than usual, the check light will be appear and car will automatically stop. This is because one of my friends using Proton Satria 1.3 with Siemens Ecu, change his t.body, change it to SGTI T.body, but it seem cannot work because the check light always appears after he full trottel his paddel. Then the car will shut down automatically. Hopefully can give some idea if want you want to turbocharge your SGTI with Siemens. Good Luck.