I want to install turbo in a few stages.
Like:
1) install S-AFC2, bigger injectors, MAP 2 bar sensor.
2) turbo, manifold, piping, intercooler etc.

So, if I do 1 stage and tune S-AFC2, should I retune it after stage 2?

 

Definately, you will need to tune after Stage 2 no matter what because you are adding boost to the equasion. Any reason you have decided on the SAFC2? The SMT6 is about the same cost and can do a lot more.

 

^^ reasons are - SAFC2 cheaper in Ukraine ($380 vs $500 for SMT-6), it has knock monitor and I think it's easier to tune (no need of laptop). SAFC has display.

If SMT6 cost cheaper in Ukraine I think I would buy SMT6.

 

go emanage if you dont want to the S-AFC route. its a little more versatile than the S-AFC