Track-ready Wrx E85 Conversion: Upgrading for Grip, Stability, and Power Delivery

by

The Subaru WRX has always been a favorite among performance enthusiasts, known for its all-wheel-drive capabilities and rally-inspired design. However, for those looking to take their WRX to the next level on the track, converting to E85 fuel can provide significant benefits in grip, stability, and power delivery. This article will explore the key aspects of an E85 conversion for track-ready WRX vehicles.

Understanding E85 Fuel

E85 is a fuel blend that consists of 85% ethanol and 15% gasoline. It offers several advantages over traditional gasoline, particularly for performance vehicles. Here are some key points about E85:

  • Higher Octane Rating: E85 typically has an octane rating of 100-105, allowing for more aggressive tuning.
  • Improved Cooling: Ethanol has a higher latent heat of vaporization, which helps keep intake temperatures lower.
  • Environmental Benefits: E85 produces fewer emissions compared to gasoline.

Benefits of E85 Conversion for WRX

Converting your WRX to run on E85 can enhance its performance in several ways. Here are some notable benefits:

  • Increased Power Output: The higher octane allows for more aggressive tuning, resulting in increased horsepower and torque.
  • Enhanced Grip: With improved power delivery, the WRX can achieve better acceleration and cornering, enhancing grip on the track.
  • Improved Stability: The all-wheel-drive system combined with the characteristics of E85 helps maintain stability during high-speed maneuvers.

Key Components for E85 Conversion

To successfully convert your WRX to run on E85, several components need to be upgraded or replaced. Here’s a list of essential upgrades:

  • Fuel System Upgrades: This includes high-flow fuel injectors and a high-capacity fuel pump designed to handle E85.
  • Tuning: A proper ECU tune is necessary to optimize the engine’s performance for E85 fuel.
  • Flex-Fuel Sensor: Installing a flex-fuel sensor allows the ECU to adjust the fuel mixture based on the ethanol content.
  • Fuel Lines and Fittings: Ensure that all fuel lines and fittings are compatible with ethanol to prevent corrosion and leaks.

Steps for Conversion

Converting to E85 involves several steps to ensure a successful upgrade. Here’s a general outline of the conversion process:

  • Step 1: Research and gather all necessary components for the conversion.
  • Step 2: Upgrade the fuel pump and injectors to meet the demands of E85.
  • Step 3: Install the flex-fuel sensor to monitor ethanol content.
  • Step 4: Adjust or reprogram the ECU with a professional tune for E85.
  • Step 5: Test the system for leaks and ensure proper fuel delivery.

Considerations and Challenges

While converting to E85 offers numerous benefits, there are some considerations and challenges to keep in mind:

  • Availability: E85 may not be readily available in all areas, so check local fuel stations.
  • Fuel Economy: E85 typically has a lower energy content than gasoline, which may affect fuel economy.
  • Corrosion: Ethanol can be corrosive to certain materials, so ensure all components are compatible.

Conclusion

Converting your WRX to run on E85 can significantly enhance its performance on the track, offering increased power, better grip, and improved stability. By understanding the benefits, necessary components, and steps involved in the conversion process, you can take your Subaru WRX to new heights. Always consult with a professional to ensure your conversion is done safely and effectively.