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e85fuel [2009/02/16 08:21] twdorris |
e85fuel [2009/02/16 08:30] twdorris |
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450 / 570 - 1 = -21% | 450 / 570 - 1 = -21% | ||
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+ | ===== Running custom mixes ===== | ||
+ | If you're running a mix (say 75% E85 and 25% gasoline), then you have to do a little more work. As an example, let's assume you're running 75% E85 and 25% gasoline. The new gas ratio in this case would be: | ||
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+ | 0.75 * 0.670 + 0.25 * 1 = 0.7525 | ||
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+ | With that new ratio calculated, you can calculate your effective injector flow rate the same as above (assuming 850 cc/min injectors again). | ||
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+ | 850 * 0.7525 = 640 | ||
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+ | So instead of 570 cc/min that results from 100% E85, your injectors will actually flow like 640 cc/min injectors with a 75% E85/25% gas mix. You can then calculate the global fuel same as always. | ||
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+ | 450 / 640 - 1 = -30% | ||