We test the power differences between 118-octane race gas and Rockett Brand E85 ethanol-blended fuel. There's a lot more to just the horsepower curve, though, as we test Holley's out-of-the-box carburetor tunes, discuss other tuning ...See moreWe test the power differences between 118-octane race gas and Rockett Brand E85 ethanol-blended fuel. There's a lot more to just the horsepower curve, though, as we test Holley's out-of-the-box carburetor tunes, discuss other tuning differences, and go over a long list of other considerations you should make if you're planning a changeover to E85. While the ethanol blend can be used for a variety of different engine designs, the test here focuses on a naturally aspirated, high-compression engine making 750 horsepower. Can you drive an engine like this on the street with E85 and save money on fuel?
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