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AZ only has E54 now, any other states like this?

Discussion in 'The Distillery' started by 2011 gtcs, Aug 29, 2016.

  1. 2011 gtcs

    2011 gtcs GT500 poster Established Member

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    I only lost 2 degrees of timing going from E85 to E54, you shouldn't lose more than 10whp and it's safer than 91
     
  2. c6zhombre

    c6zhombre E85 NutSwinger Established Member

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    Went to the same station Stripes I filled up on 9-16-16.....tested E90 today!

    So far, that "54-83" sticker has not been accurate. Tested higher than max (86 n 90) the two times I've filled up the past 2 months
     
  3. DHG1078

    DHG1078 ¯\_(ツ)_/¯ Established Member

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    Is an E55 tune safe for E85 gasoline? If not, you guys may have to get a few tunes that run the gamut of ethanol content ratings and swap tunes as your tests indicate.

    I wonder if they do this during the winter due to ethanol's propensity to absorb moisture? Lower the ethanol content, lower to potential water content.
     
  4. DHG1078

    DHG1078 ¯\_(ツ)_/¯ Established Member

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    A quick search has a couple sources saying its due to cold starts in the colder temperatures due to flash points and vapor pressures and other such science stuff. Every region runs a different class of ethanol at different seasons. Class 1 being a "summer" blend with the highest ethanol content. They talked about 70% being to lowest ethanol content allowed though, not 55...
     
  5. c6zhombre

    c6zhombre E85 NutSwinger Established Member

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    Yes I've always read they lower it for cold starts in northern states.

    I left 1 gallon of pre tested ethanol in a plastic container for 9 months in a very humid garage. It tested 85% at the pump. I tested it again 9 months later and got 85% again. No additional water that I could tell....or one would figure the ethanol test would have changed.

    I dumped the gallon in the car and it ran just as good as it always does. No issues.
     
  6. MG0h3

    MG0h3 Premium Member Premium Member Established Member Established Member

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    Running a higher ethanol content than what you are tuned for will leave you lean. As the number goes up, there is less gasoline and you need more volume.
     

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