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Old 05-27-2014, 09:40 AM   #5
Apoc
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Based on my limited experience with tuning, the sweet spot for N/A AFR at WOT is between 12-12.5 to 1. The AFR from stock o2 sensors is not that accurate, so most tuning I've seen done here lately keeps a bit lower at 11.5-12 as a safety margin without any loss of power.
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