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The power enrichment versus rpm table controls the target equivalency ratio during WOT. This tends to be the main air-fuel-ratio (AFR) tuning table used during dyno tuning. We've found actual engine AFRs do vary from the target settings, so using a wide-band meter is a necessity when making changes to this table. We also toggle "COT" off when tuning PE, and re-enable it once tuning is complete.