AFR, stoichiometric ratio, and lambda are often misunderstood in ECU tuning.
This video explains how AFR, stoich, and lambda actually work in Haltech and why lambda is king.
In this Haltech Tech Tips video, we break down the relationship between AFR, stoichiometric ratio, and lambda, and explain how they are used inside a Haltech ECU.
Many tuning issues come from misunderstanding how AFR numbers change with different fuels, while lambda remains constant. Haltech uses lambda internally, then converts it to AFR using the selected fuel’s stoichiometric value.
In this video, you’ll learn:
• What AFR, stoich, and lambda actually mean
• How Haltech converts lambda targets into AFR
• Why the stoichiometric value must be correct for your fuel
• How incorrect stoich values cause fueling errors
• Why tuning in lambda provides consistent results across fuels
This video focuses on the concepts behind fueling calculations so you can make better tuning decisions and avoid common mistakes.
🔧 ECU Platform: Haltech
🚗 Topic: AFR, Stoich, and Lambda
📺 Series: Haltech Tech Tips
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