E85 air/fuel Ratios

Ukfox89

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May 11, 2011
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Hey guys, just got my car tuned on e85. I did some looking online, but didn't really get a clear answer. I have a wideband on the car that was originally calibrated with regular 91 octane. im now running E85 and haven't recalibrated the gauge. Idle the car runs about mid 9s:1 which from what I have read is about right. at wot it goes into the mid 11s:1. this is wher eim getting confused. it says the Air/fuel for a E85 mix is supposed to be id 7s:1 Wot. what is everyones readings on their gauges, and do I need to recalibrate my gauge. Thanks Ben

car is a F1a 2003 cobra btw....if that matters
 

ctgreddy

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what kinda gauge do you have? even tho stoich for e85 is in the mid 9's a lot of widebands still show stoich as 14.7, they convert it. so 11's at wot would be where you wanna be. However it's weird it shows 9 at idle then 11 at wot.
 

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