e85fuel
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e85fuel [2009/02/16 08:30] 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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| For example, if you're running 100% E85 with 850 cc/min injectors, your injectors are flowing the equivalent of 570 cc/min injectors on gasoline: | For example, if you're running 100% E85 with 850 cc/min injectors, your injectors are flowing the equivalent of 570 cc/min injectors on gasoline: | ||
| - | 850 * 0.670 = 570 | + | 850 * 0.670 = 570 |
| The 0.670 figure comes from the gas ratio column of the table above. | The 0.670 figure comes from the gas ratio column of the table above. | ||
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| So now you can calculate your new global fuel using the standard formulas and 570 cc/min injector size instead of 850. | So now you can calculate your new global fuel using the standard formulas and 570 cc/min injector size instead of 850. | ||
| - | 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]] | ||
e85fuel.txt · Last modified: 2024/03/15 11:16 (external edit)
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