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The Subaru WRX has gained a reputation for its performance and tuning potential. One popular modification among enthusiasts is converting the WRX to run on E85 fuel. This biofuel blend of 85% ethanol and 15% gasoline offers higher octane ratings and can lead to increased horsepower. However, to ensure a reliable E85 conversion, proper preventative maintenance and the use of high-quality fuel system components are essential.
Understanding E85 Fuel
E85 fuel has distinct characteristics that differentiate it from regular gasoline. It has a higher ethanol content, which can provide several benefits, but also requires specific considerations for vehicle performance and maintenance.
- Higher Octane Rating: E85 typically has an octane rating of 100-105, allowing for more aggressive tuning.
- Cooling Properties: Ethanol has a higher heat of vaporization, which can help cool the intake charge.
- Environmental Benefits: E85 is considered more environmentally friendly due to lower greenhouse gas emissions.
Preventative Maintenance for E85 Conversion
Before converting your WRX to E85, it’s important to conduct thorough preventative maintenance. This ensures that your vehicle is in optimal condition to handle the demands of the new fuel type.
Inspecting Fuel System Components
The fuel system is critical when converting to E85. Inspecting and upgrading components can prevent issues down the line.
- Fuel Pump: Ensure your fuel pump can handle the flow rate required for E85.
- Fuel Injectors: Consider upgrading to larger, high-flow injectors designed for E85.
- Fuel Lines: Check for compatibility with ethanol; replace rubber lines with ethanol-resistant materials.
- Fuel Filter: Replace the fuel filter to prevent clogging from contaminants.
Regular Maintenance Checks
Establishing a regular maintenance schedule is vital. This includes checking and replacing components as necessary.
- Oil Changes: Use high-quality synthetic oil to withstand the demands of E85.
- Air Filter: Replace the air filter regularly to ensure optimal airflow.
- Fuel System Cleaning: Periodically clean the fuel system to remove deposits.
High-Quality Fuel System Components
Investing in high-quality fuel system components is crucial for a successful E85 conversion. These components can significantly affect performance and reliability.
Choosing the Right Fuel Pump
When selecting a fuel pump for your WRX E85 conversion, consider the following:
- Flow Rate: Ensure the pump can deliver enough fuel for your power goals.
- Durability: Choose a pump designed to handle the corrosive nature of ethanol.
- Brand Reputation: Opt for reputable brands known for performance and reliability.
Upgrading Fuel Injectors
Fuel injectors play a vital role in delivering the correct amount of fuel to the engine. Upgrading to high-flow injectors can maximize performance.
- Size: Larger injectors can provide the necessary fuel for increased power.
- Compatibility: Ensure injectors are compatible with E85 and designed for high-performance applications.
- Brand Quality: Choose injectors from trusted manufacturers with a proven track record.
Fuel Lines and Fittings
Using fuel lines and fittings that can withstand ethanol is essential. Ethanol can degrade standard rubber components, leading to leaks and failures.
- Material: Use stainless steel or ethanol-resistant rubber lines.
- Fittings: Ensure all fittings are compatible with the chosen fuel lines.
- Routing: Keep fuel lines away from heat sources to prevent degradation.
Conclusion
Converting your Subaru WRX to E85 can unlock significant performance gains, but it requires careful planning and execution. By focusing on preventative maintenance and investing in high-quality fuel system components, you can ensure a reliable and successful conversion. Regular checks and upgrades will keep your vehicle performing at its best, allowing you to enjoy the full benefits of E85 fuel.