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AFR E85 vs Gasoline

Understanding AFR

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Discussion and questions related to the course Understanding AFR

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If I'm using a widebandsensor and set the gauge for gasoline,

I'm then running the car on e85, what AFR`s should i be having at idle/start to boost, and full boost ?

Basically when running like that you would target a similar AFR on E85 as if you were on Gasoline. (Obvioulsy also denpendent on the setup and what you're using it for etc)

As a starting place idle around 14:1 (Actual E85 AFR = 9.3:1)

Crusie 14.7:1 (Actual E85 AFR = 9.75)

100-120KPA 13:1 (Actual E85 AFR = 8.6:1)

Full boost 11.8:1 (Actual E85 AFR = 7.8:1)

Remember an 02 sensor is only measuring 02 content and doesn't care what gas you're using. The controller/gauge will convert the voltage to a value which is displayed as your "AFR" so stoich for E85 or Gas will still read 14.7:1

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