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safc's dont control timing, however they do usually negatively effect it. normally the timing increases with them which is the opposet effect you want. Your much better off with an enthaply tune than a safc. I have see multiple times a ka with a working o2 sensor idle and drive fine with 370cc injectors and a stock maf with no tune and go into decent air fuel ratios under boost, the problem was the timing so a full tune still had to be done.
Ill send you a pm about my tuning services but it probably isnt worth it if you already got a enthaply tune.
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