Editing E85

{{youcanedit}} ==What is E85?== E85 is a fuel mixture that typically contains 85% denatured 160 proof or higher ethanol and 15% very high volatility gasoline. Ethanol (also known as ethyl alcohol or grain alcohol) is the "alcohol" found in alcoholic beverages. "Denatured" means that it has been made toxic or undrinkable, often by adding methanol or denatonium, to give it a very bitter taste. This minimizes the drug value of the alcohol, and also exempts it from expensive alcohol taxes. In the United States, ethanol is derived mainly from corn. There are about 1,200 gas stations in America selling E85 fuel. Most of them are located in the Midwest, where corn is a staple crop. ==E85 vs. gasoline== E85 provides horsepower that is comparable to gasoline. Its octane rating is about 100 to 105. This means that it can be used in higher-compression engines, which could lower emissions (confirm and expand this). However, E85 gets about 25% fewer miles per gallon than regular gasoline, and it contains less energy per volume than gasoline. ==Benefits of E85== *As a "renewable" energy source, E85 has the potential to offer decreased reliance on foreign energy. As it develops further, it may also be able to demonstrate decreased carbon emissions when compared to standard gasoline. *According to the US Department of Energy, ethanol has a "positive energy return". This means that it produces more energy than it consumes in its manufacturing process. The same is not true of gasoline. ==Damage caused by using E85 in an engine== *Prolonged exposure to ethanol corrodes metal and rubber parts that are designed to be used with gasoline. *Use of fuel with more than 10% ethanol content will void most car manufacturers' warranties. *Water contamination of fuel is exacerbated by the presence of ethanol. *Air-fuel mixture problems (expand on this). ==Economic concerns from E85 use== *Ethanol production will increase the cost of corn, and the cost of food products that contain corn, or rely on corn for their production (such as beef). *Ethanol production consumes large amounts of water. *The cost of "converting" existing vehicles to run on E85. *E85 may be viable, but it has a long way to go before it can be relied on by an entire economy. ==Performance disadvantages of E85== *Longer warm-up time. *More difficult cold-starting in cold climates, especially below 25 degrees F. ==Aftermarket ethanol conversion kits== Largely for safety reasons, US law prohibits the manufacture of most ethanol conversion kits, unless they are EPA certified. The certification process is too expensive and time-consuming to be considered a reasonable option for most consumers. ==Converting to E85== *Because it is slightly corrosive, some of the fuel system may need to be replaced. Ethanol, however, is much less corrosive than methanol, and the two should not be confused with eachother. Many people have run their cars on E85 for several years with no fuel system corrosion problems. *Ethanol runs at a richer air-fuel ratio, so you need to use more of it. ===Carbureted engines=== *All fuel and air passages must be enlarged. ===Fuel injected engines=== Feedback type fuel injection systems are idea candiates for using E85. 50% Larger fuel injectors are required, and an increase in ignition timing to compensate for the slower burning of the E85. The feedback narrow band O2 sensor is a Lambda O2 and does not need to know what stoichiometric is, the sensor looks for the most O2 in the exhaust and the engine controller makes all the appropriate fuel calculations for the new fuel. The larger fuel injectors and no engine controller modifications will prevent you from running dual fuel, as in gasoline OR E85, or a mixture of the 2. ==Switchgrass== Is this a better source for ethanol? Need to expand on this. ==External resources== *http://www.e85forum.com/ *http://www.e85fuel.com/ *[http://www.eere.energy.gov/afdc/fuels/ethanol_locations.html E85 fueling station locations] ==E85 conversion studies== *[http://www.utep.edu/eafrl/pc99/99utep_evc.pdf University of Texas at El Paso E85 Chevrolet Silverado Conversion] *[http://www.engr.unl.edu/~ethanol/unl-sae2.pdf University of Nebraska-Lincoln E85 Chevrolet Silverado Conversion] ==References== *http://en.wikipedia.org/wiki/E85 *http://en.wikipedia.org/wiki/Ethanol_fuel *http://en.wikipedia.org/wiki/E85_in_the_United_States *http://en.wikipedia.org/wiki/Ethanol *http://en.wikipedia.org/wiki/E85_in_standard_engines *http://media.gm.com/us/gm/en/news/press_kits/07_e85_FallTour/Myths_Misinformation.htm *http://en.wikipedia.org/wiki/Switchgrass *http://en.wikipedia.org/wiki/Ethanol_fuel_in_Brazil *http://www.hotrodders.com/forum/setting-carb-e85-106947.html *http://www.hotrodders.com/forum/e85-anyone-tried-99137.html *http://www.hotrodders.com/forum/e85-fuel-97285.html [[Category:Engine]] {{youcanedit}}

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