I'm planning to tune my car but I need to get this straight first. Does different stages have different ECU tuning? Or is it the same ECU with additional parts in higher stages?
Each Stage should have a different software map for the ECU which optimisies the corresponding additional or upgraded hardware.
So the stage 1 and stage 3 "programme" or map is NOT the same.
I guess I'm suggesting that if you fit a Stage one ECU and add Stage three hardware you will not be at "stage 3"
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