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SVTPerformance's Chain of Restaurants
The Distillery
Different Blends
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<blockquote data-quote="RFH" data-source="post: 10448962" data-attributes="member: 35112"><p>The octane of gasoline/ethanol blends is non-linear. It increases 3 points at E10 and at E50 the octane is around 100 and levels out after that. </p><p></p><p>Each 10% in ethanol added to gasoline will require an additional 3% of extra fuel due to the increased oxygen concentration in the ethanol (which is ~28% oxygen by mass). So a tune for E70 will be 4.5% leaner than a tune for E85. </p><p></p><p>Basically an E70 tune would be lean running E85 and an E85 tune will be rich running E70.</p></blockquote><p></p>
[QUOTE="RFH, post: 10448962, member: 35112"] The octane of gasoline/ethanol blends is non-linear. It increases 3 points at E10 and at E50 the octane is around 100 and levels out after that. Each 10% in ethanol added to gasoline will require an additional 3% of extra fuel due to the increased oxygen concentration in the ethanol (which is ~28% oxygen by mass). So a tune for E70 will be 4.5% leaner than a tune for E85. Basically an E70 tune would be lean running E85 and an E85 tune will be rich running E70. [/QUOTE]
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SVTPerformance's Chain of Restaurants
The Distillery
Different Blends
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