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SVTPerformance's Chain of Restaurants
The Distillery
E85 and non-ported Eaton question
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<blockquote data-quote="HotStart" data-source="post: 10345286" data-attributes="member: 75155"><p>I always see this figure thrown around (not picking on you Digital) and I'm just wondering how it gained so much authority. It seems like most people on forums will give you this answer. Perhaps it's just one of those things that someone said and then soon became "fact"?</p><p></p><p>By mass, E-85 requires 50% more fuel than gasoline. Not 30%. </p><p></p><p>Ex. if you were trying to achieve a stoichiometric A/F ratio with both fuels, you would need to hit the following targets which everyone is familiar with. </p><p></p><p>Gasoline would need roughly a 14.7:1 A/F ratio </p><p></p><p>E-85 would need roughly a 9.85 A/F ratio.</p><p></p><p>These ratios are based on mass. for every 14.7lbs of air, you need 1lb of gasoline.</p><p></p><p>if you are consuming 100lbs of air, you need to use 6.80lbs of gasoline to achieve a 14.7:1 ratio.</p><p></p><p>(100/14.7=6.80)</p><p></p><p>To achieve stoich with that same 100lbs of air using E-85, you would need 10.15lbs of fuel. </p><p></p><p>(100/9.85=10.15)</p><p></p><p>Now if we're talking about how much MORE fuel you'd need to run E-85 if you were previously using gasoline, you would need to increase your fuel mass from 6.80lbs to 10.15lbs...</p><p></p><p>(10.15/6.80=1.492)</p><p></p><p>So the number that you'd have to multiply 6.80 (your gasoline mass)by to reach 10.15 (your E-85 mass) is 1.492. An increase of 49.2%.</p><p></p><p>(6.80*1.492=10.15)</p></blockquote><p></p>
[QUOTE="HotStart, post: 10345286, member: 75155"] I always see this figure thrown around (not picking on you Digital) and I'm just wondering how it gained so much authority. It seems like most people on forums will give you this answer. Perhaps it's just one of those things that someone said and then soon became "fact"? By mass, E-85 requires 50% more fuel than gasoline. Not 30%. Ex. if you were trying to achieve a stoichiometric A/F ratio with both fuels, you would need to hit the following targets which everyone is familiar with. Gasoline would need roughly a 14.7:1 A/F ratio E-85 would need roughly a 9.85 A/F ratio. These ratios are based on mass. for every 14.7lbs of air, you need 1lb of gasoline. if you are consuming 100lbs of air, you need to use 6.80lbs of gasoline to achieve a 14.7:1 ratio. (100/14.7=6.80) To achieve stoich with that same 100lbs of air using E-85, you would need 10.15lbs of fuel. (100/9.85=10.15) Now if we're talking about how much MORE fuel you'd need to run E-85 if you were previously using gasoline, you would need to increase your fuel mass from 6.80lbs to 10.15lbs... (10.15/6.80=1.492) So the number that you'd have to multiply 6.80 (your gasoline mass)by to reach 10.15 (your E-85 mass) is 1.492. An increase of 49.2%. (6.80*1.492=10.15) [/QUOTE]
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SVTPerformance's Chain of Restaurants
The Distillery
E85 and non-ported Eaton question
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