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ignition timing on higher altitudes

EFI Tuning Fundamentals

Discussion and questions related to the course EFI Tuning Fundamentals


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If i dont have a Dyno, and im reflashing OEM ECU with predetermined Maps that i can adjust, what would be the factor correction of timing depending the 500m above sea level, 1000mts above sea level, 1500 above sea level, 2000m above sea level.