yes the internals can handle 17 psi, no problem really. Keep the tune good and use good fuel and you can go more than that. Many people have gone well over 20 psi on the factory bottom end. Hell some have gone over 30. the tune has to be very good at that point and so does the fuel, but they are very strong. I run 28 psi right now(have gone higher) and thats on a 3076r turbo.
As for the Evo4 turbo, I would like to see how they did that. The Evo 4-9 all have the engine in backwards to the DSM, GVR4 and Evo1-3. The turbo wouldn't bolt right up I don't think, as the cold side would be on the other side for the Evo 4 from our cars(and yours)
If your fuel pump is up to it(not sure on the Evo1 pump) then you need a full exhaust system(right from the turbo, not a cat back , but with downpipe), intake system, and injectors, and a boost controller. You already have the injectors so thats taken care of.
How is the car tuned electronically? IE, bigger injectors are not going to run well with the stock computer and MAF. The calibration will be off and the ECU won't know that the injectors are bigger. Up to a point, in closed loop the thing will take care of itself, but in open loop it will be too rich.
You will need something to datalog the car with. You need to be able to datalog things like knock, timing, injector pulsewidth, airflow etc. This way you can turn up the boost and know whats happening. You can't tune a turbo car by ear as by the time you can hear knock, its way too late and will do damage. the datalogger will show it and you can tune for it.
oh you also need a real boost guage. Most Mitsu boost guages are just computer estimates based on airflow, throttle position etc.
Get a real one. I suggest a -30, 0, 30 guage. If you don't have one, I actually do and you can have it for cheap. Works great, but I just don't need it anymore.
