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Why Does Ethanol Make So Much Power? (Versus Gasoline)

Ethanol has less energy than gasoline, but it can make so much more horsepower! Is ethanol bad for your car's engine?    • Is Ethanol Bad For Your Car's Engine?   Subscribe to Engineering Explained for more videos! - https://goo.gl/VZstk7 Recommended Books & Car Products - http://amzn.to/2BrekJm EE Shirts! - http://bit.ly/2BHsiuo Ethanol contains less energy than gasoline, and yet it can make so much more power! How is that possible? This video will cover the differences in air/fuel ratios for ethanol vs gasoline, the energy density differences (by mass and volume), fuel economy differences, and octane number differences. Critically, the reason for octane number differences will be explained, with both the chemical composition and the cooling effect of ethanol providing a large advantage. Finally, we'll look at real world testing to see how much more power ethanol can make, as well as the efficiency differences of E85 ethanol vs E10 gasoline. And if ethanol really is more efficient, then why do you get worse fuel economy using E10 vs E0 (gasoline)? Whenever a fuel is listed as E10, E15, E85, E100 or E##, the number simply represents the percentage of ethanol in the fuel by volume. So for example, most pump gas today is E10, meaning up to 10% ethanol by volume, and the rest is gasoline. Related Videos: Knock Explained -    • Engine Knock Sound - Explained   Super Knock -    • How Super Knock Can Destroy Modern En...   AKI vs RON vs MON -    • Does Europe Have Higher Octane Gas? R...   Compression Ratio -    • Compression Ratio - Explained   Port vs Direct Injection -    • What's The Best Fuel Injection? Carbu...   Ethanol Bad For Engines? -    • Is Ethanol Bad For Your Car's Engine?   Is Corn Ethanol A Bad Idea? -    • America Was Wrong About Ethanol - Stu...   References: Fuel Properties - https://afdc.energy.gov/fuels/properties Ethanol Basics - https://afdc.energy.gov/fuels/ethanol... Effective Octane Numbers 1 - https://doi.org/10.4271/2012-01-1275 Effective Octane Numbers 2 - https://doi.org/10.4271/2012-01-1284 Ford 3.5L Engine Study - https://doi.org/10.4271/2014-01-1228 Engineering Explained is a participant in the Amazon Influencer Program. Don't forget to check out my other pages below! Instagram:   / engineeringexplained   Facebook:   / engineeringexplained   Twitter:   / jasonfenske13   EE Extra:    / @engineeringexplainedextra