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SVTPerformance's Chain of Restaurants
The Distillery
Mail-in Ethanol blend testing?
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<blockquote data-quote="SecondhandSnake" data-source="post: 16535619" data-attributes="member: 116684"><p>So basically you're concerned about octane? Doing some theoretical math just to set your bounds-</p><p></p><p>Assume that they blend anywhere from 85 to 91 octane. (Most of the pumps here state the gasoline used is 85 for blends, but that may vary by location) Ethanol has a blended octane value (BOV) that's going to vary based on what it's blended with (based on this link here <a href="https://ethanolrfa.org/wp-content/uploads/2017/10/ESOTA_RFA_Cooper_Octane.pdf" target="_blank">https://ethanolrfa.org/wp-content/uploads/2017/10/ESOTA_RFA_Cooper_Octane.pdf</a>). All calculations are in AKI [(R+M)/2 method, pump standard in the US).</p><p></p><p>E54 w/85 blend- (0.54 x 119) + (0.46 x 85) = 64.26+39.1=103.36</p><p>E54 w/91 blend- (0.54 x 112) + (0.46 x 91) = 60.48+41.86=102.34</p><p>E85 w/85 blend- (0.85 x 119) + (0.15 x 85) = 101.15+12.75=113.9</p><p>E85 w/91 blend- (0.85 x 112) + (0.15 x 91) = 95.2+13.65=108.85</p><p></p><p>Basically you're looking at a loss of anywhere from 5-11 points.</p><p></p><p>As for what you might need to do with timing that's another discussion altogether. I'm planning to do a linear blend between the gasoline and E85 values, but I'm sure that's probably on the conservative side.</p></blockquote><p></p>
[QUOTE="SecondhandSnake, post: 16535619, member: 116684"] So basically you're concerned about octane? Doing some theoretical math just to set your bounds- Assume that they blend anywhere from 85 to 91 octane. (Most of the pumps here state the gasoline used is 85 for blends, but that may vary by location) Ethanol has a blended octane value (BOV) that's going to vary based on what it's blended with (based on this link here [URL]https://ethanolrfa.org/wp-content/uploads/2017/10/ESOTA_RFA_Cooper_Octane.pdf[/URL]). All calculations are in AKI [(R+M)/2 method, pump standard in the US). E54 w/85 blend- (0.54 x 119) + (0.46 x 85) = 64.26+39.1=103.36 E54 w/91 blend- (0.54 x 112) + (0.46 x 91) = 60.48+41.86=102.34 E85 w/85 blend- (0.85 x 119) + (0.15 x 85) = 101.15+12.75=113.9 E85 w/91 blend- (0.85 x 112) + (0.15 x 91) = 95.2+13.65=108.85 Basically you're looking at a loss of anywhere from 5-11 points. As for what you might need to do with timing that's another discussion altogether. I'm planning to do a linear blend between the gasoline and E85 values, but I'm sure that's probably on the conservative side. [/QUOTE]
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The Distillery
Mail-in Ethanol blend testing?
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