are designed to operate correctly on the factory tune when using fuel that contains between 10% (E10) and 15% (E15) ethanol. E85 fuel is also generally a decent amount cheaper than normal pump gas. One nice side effect of that is that extra E85 fuel will help cool your combustion chamber and turbo, and thus help maintain maximum power and reliability. This especially applies to engines that are turbocharged from the factory. E85 basically eliminates this constraint, allowing the engine to achieve the maximum power possible. From the factory, a new engine is almost always "knock limited", which means it cannot achieve its maximum design power on normal gasoline due to engine knock occurring. This is bad because it can cause extra stress on the engine, and doesn't make optimal power either. Engine knock occurs when areas of the air fuel mixture ignite before the should due to excessive heat for the fuel type used. This high octane rating allows E85 to resist engine knock. The main reason E85 allows for some much more power than traditional gasoline is that it has a very high octane rating, usually from around 100 to 105 octane, compared to 91 to 93 octane from normal gasoline. The ethanol often is made from corn and is the same type of alcohol you would find in hard liquor, with the exception that fuel ethanol is denatured with additives to make it undesirable and harmful to drink.
Keep in mind the ethanol percentage can be lower during the winter months in some areas. The remaining 15% of the fuel is traditional gasoline. Q: What is E85 and why does it easily give so much more power?Ī: E85 is a biofuel composed of up to 85% ethanol. Also, Hondata's base settings are usually good enough to run the engine temporarily, but custom tuning is highly recommended. IMPORTANT NOTE: These PnP kits are only compatible with the Hondata S300 v3 and K-Pro v4 systems, and the purchase of this product does not include a Hondata S300 or K-Pro. Your tuning device will automatically adjust on the fly for your current fuel mixture. It can have any combination of E85 and non-E85 gasoline in it. TIP: Your gas tank is not required to just have all E85 fuel in it after installing this kit (hence the name Flex Fuel). Combined with a tuning device, it converts your Honda Prelude to run on higher concentrations of ethanol (like E85) than is in standard pump gas. What is a Flex Fuel Kit in simple terms? It is basically a special sensor installed along one of your fuel lines that reads the amount of ethanol in your fuel, produces a signal, and sends a processed version of that signal to your ECU for use by your tuning device. Emissions Warning: This product is not designed for public highway or street use, and is only legal for formally sanctioned race use on a racing vehicle that may never be used on a public highway or street.
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