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e85fuel [2009/02/16 08:31] twdorris |
e85fuel [2009/10/08 20:33] calan |
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To calculate these values, use the following formula: | To calculate these values, use the following formula: | ||
- | <% ethanol> * 9.0078 + <% gasoline> * 14.64 | + | <% ethanol> * 9.0078 + <% gasoline> * 14.64 |
For example, for running pure E85, you would use: | For example, for running pure E85, you would use: | ||
- | 0.85 * 9.0078 + 0.15 * 14.64 = 9.8526 | + | 0.85 * 9.0078 + 0.15 * 14.64 = 9.8526 |
The 14.64 figure above comes from the chemically correct stoichiometric ratio of gasoline. A lot more data can be found on the [[http://en.wikipedia.org/wiki/E85_in_standard_engines|wikipedia E85 page]]. | The 14.64 figure above comes from the chemically correct stoichiometric ratio of gasoline. A lot more data can be found on the [[http://en.wikipedia.org/wiki/E85_in_standard_engines|wikipedia E85 page]]. | ||
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450 / 570 - 1 = -21% | 450 / 570 - 1 = -21% | ||
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450 / 640 - 1 = -30% | 450 / 640 - 1 = -30% | ||
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+ | ===== E85 worksheet ===== | ||
+ | One of our ECMLink users, Craig Starnes, provided the following Excel worksheet for calculating various values related to running E85, particularly with a mix of gasoline. | ||
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+ | [[http://www.ecmtuning.com/images/forums/Stoich%20Calculator%20For%20E85%20Blends.xls|Stoich Calculator For E85 Blends]] | ||