E85/Ethanol Fuel vs AFR's | Ethanol Fuel Tuning [HPA Q&A]

How does E85 change our air fuel ratio numbers when compared to pump gas? This question was answered during a free live lesson.
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[@samituomisto106]

The reason why the E85 stoichiometric A/F (lambda= 1) differs from the petrol is because the E85 contains hydrocarbons but also the OH group (C2H5OH). So there is internal oxygen in the fuel. When burning the E85 with lambda 1 it need less external air to burn because of this "internal" oxygen...

[@concinnity1240]

This channel/organization doesn’t get enough love. Thanks for sharing some more advanced performance stuff! Info like this can be hard to come by in video.

[@hpa101]

Cheers for the love mate! We'll keep the content coming - Taz.

[@BEYTEK]

Lambda is king! Worth converting over.

[@BrodeyDoverosx]

But you still need to know stoich and update it in your fuel model…

[@PANTYEATR1]

the answer was just right Andre thanks💪

[@hpa101]

Hope you're keeping well dude! - Taz.

[@PANTYEATR1]

@@hpa101 everything is great thanks. i wish you guys the same💪

[@chrisobrien9334]

I didn’t know that there was a stoic emetic thing for 98vse85. So if using a Fueltech Exhaust Nano should I be aiming for the 9.8 that e85 is or go for the 11-11.5 range And also there’s the variables depending on what my motor likes. Mild LS1 turbo Ls9 cam
Using a flex fuel to. Thanks for your time

[@KongZillaaaa]

Thank you! 👏🏼

[@alundrasrt]

Hi, any tips for idle, crusing, building boost area and full throttle numbers? I'm like 13, 12, 11.5 and 11,2. Thanks. Sorry I only hace AFR guage without lambda display. Thanks.

[@kellypark007]

I noticed after getting tuned on e85 my afr is 14;7 1 and my fuel trims are more.towards lean +10 until I hit the throttle. What you think k about that

[@keithbartlett7679]

What about NA motor??

[@kraftzion]

14.7 to 1 for gasoline. 14.1 to 1 for 10% ethanol pump gas.

[@hpa101]

That's the stoichiometric ratio which is independent of target AFR in performance applications where we might run leaner or richer in different areas of the map - Taz.
www.hpacademy.com/blog/how-much-more-power-can-you-make-on-e85/
www.hpacademy.com/blog/the-biggest-mistake-tuners-make-r34-gtr-tuning-and-dyno-run-techtalk/