Fuel System Modifications:
* Fuel Injectors: E85 has a lower energy density than gasoline, so E85 engines typically require larger fuel injectors to deliver the necessary amount of fuel.
* Fuel Lines and Components: Ethanol is more corrosive than gasoline, so E85 engines may have special fuel lines, seals, and components designed to withstand ethanol's effects.
* Fuel Sensors: Some E85 engines have additional sensors to monitor ethanol content and adjust fuel delivery accordingly.
Compression Ratio:
* E85 has a higher octane rating (around 105) compared to regular gasoline (around 87-91). To take advantage of this higher octane rating, E85 engines often have higher compression ratios than gasoline engines. This allows for more efficient combustion and increased power output.
Fuel Mapping:
* The engine's electronic control unit (ECU) has modified fuel maps to account for the different fuel properties of E85. These adjustments ensure optimal air-fuel ratios and engine performance.
Emission Control Systems:
* Some E85 engines may have modified or additional emission control systems to meet emissions standards while running on ethanol.
Cold Start Assistance:
* Ethanol has a lower vapor pressure than gasoline, which can affect cold starts in cold weather conditions. E85 engines may have features such as cold start assist systems or flexible fuel sensors that adjust fuel delivery during cold starts.
It's important to note that not all gasoline engines can be converted to run on E85. Some vehicles require specific modifications or are designed specifically to run on E85 from the factory. Always consult the vehicle manufacturer or a qualified mechanic before converting a gasoline engine to run on E85.
