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N2 Speed Blog | Performance Tuning News & Tips

Lambda to AFR Chart & Air Fuel Ratio Calculator

Posted by CMB on Nov 25th 2025

Lambda to AFR Chart & Air Fuel Ratio Calculator

Lambda to AFR: Quick Answers Lambda is the ratio of actual air-fuel ratio to stoichiometric. AFR = Lambda × stoichiometric AFR. For pump gasoline stoich is 14.7, so Lambda 0.85 = 12.50 AFR. Here … read more