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Even though I use a SAFC to tune with (CT20B and stock injectors) I highly recommend using the ATS rom tune to go with your set up. They can optimize the timing and fuel maps without compromise. I have read many threads also on the subject matter of black boxes and think that I would go the ATS rom tune route if I did my project from scratch. It can even be sent back for re-tuned maps if you make additional big changes to the motor in the future. It's like having a fuel controller, only better, in that you have a tuner to get the adjustments correct.

With an SAFC (even with a really good tuner) you are still stuck with compromised timing maps at best. It will be overly advanced if you use positive corrections for fuel, and overly retarded with negative numbers (based on factory timing setttings).
 
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