ok so i want to boost my mazda 3 2.3l but i dont kno what i all need.... i mean i kno i need the turbo kit and stuff but idk if i can run the stock ecu or do i have to chip it or remap it... would i need diffrent injectors...also i want to run it on stock internals so i dont want to push to much boost whats a safe level to keep it at if i do boosted

 

I'm sure someone else will chime in.

Stock internals are not going to hold up well if you're hard on it.
You cannot use the stock ECU. If you get a kit it should come with an ECU.
Injectors should be fine.
Considering the cost just go get a Speed3.

 

If you have an auto dont bother, if not then your gonna have to look into carbon treating the gears once you get past/near 300 (which is not hard). As far as the ECU you need a standalone. There is no chip available and is highly recommended not to do it anyway, there are 2 maybe 3 companies that have a "tuner" but is not good enough for a turbo setup. You good on injectors, and depending on condition of motor your not gonna want to see past 7psi