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Air/Fuel % E85 vs 93 octain

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Old Jan 8, 2012 | 01:15 PM
  #1  
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From: Darlington, S.C.
Air/Fuel % E85 vs 93 octain

On 93 on the street I like to be around 14.5 to 14.7. I'm now on e85. Are you guys tuning to the same percentage? The reason I raise the question is there are some E85 a/f gauges out the that only read from 7 -11 a/f? Should I be lower than 14.5 on E85? The plugs are light gray.
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Old Jan 8, 2012 | 01:41 PM
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Most people use the WB in Gas AFR scale. If you do that, then for idle ~15.2, Cruise ~16.5, WOT Full Boost ~12.0.
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Old Jan 8, 2012 | 06:43 PM
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From: michigan
Idle is around 14.8to 15.4 for e85 cruise is about the same

WOT is 11's
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Old Jan 8, 2012 | 06:50 PM
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Yeah, that's the confusing part because Stychometeic for E85 is 9.7:1

The lowest I've ever seen an Evo run is 11:1 at WOT
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Old Jan 8, 2012 | 09:03 PM
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Originally Posted by TheBoz
Most people use the WB in Gas AFR scale. If you do that, then for idle ~15.2, Cruise ~16.5, WOT Full Boost ~12.0.
+1

Most of the time people keep it on the gas scale because that's what they're used to seeing and understanding. If you see 14.7, it's really 9.7.
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