cx-7 turbo

So I had a quick question due to my ignorance on the subject. If I upgrade my Turbo from my stock one, do I need to flash my ECU? I recently replaced my timing chain and VVT, Cam and crank position sensors, rebuilt my high pressure fuel pump, replaced injectors and fuel rail. I am beyond certain...

Hello, My speed3 is running low on boost (13.57 psi is the most I can get from it if I’m pushing it hard, and this is in 5th) but seemingly not leaking boost when I tested leaks from the turbo back. I can only make 8psi in a 3rd gear wot test. I’m running the Mazda CX-7 turbo (K0422-582) that...