Wrx E85 Conversion Fuel System: Choosing High-flow Pumps and Compatible Injectors for 600+ Hp

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WRX E85 Conversion Fuel System: Choosing High-Flow Pumps and Compatible Injectors for 600+ HP

The Subaru WRX is a popular choice among car enthusiasts looking to enhance performance. One of the most effective ways to achieve significant horsepower gains is by converting to an E85 fuel system. This article will guide you through the essential components needed for a successful WRX E85 conversion, focusing on high-flow pumps and compatible injectors suitable for achieving 600+ horsepower.

Understanding E85 Fuel

E85 is a blend of 85% ethanol and 15% gasoline, offering higher octane levels than traditional fuels. This allows for more aggressive tuning and increased power output. However, converting to E85 requires specific considerations for your fuel system.

Advantages of E85

  • Higher Octane Rating: E85 typically has an octane rating of around 105, which helps prevent knocking.
  • Cooling Effect: Ethanol has a cooling effect, which can help reduce engine temperatures under high load.
  • Increased Power: With proper tuning and fuel system upgrades, E85 can significantly boost horsepower.

Components of an E85 Conversion Fuel System

To maximize the performance of your WRX when running E85, you will need to upgrade several components of your fuel system. The critical components include high-flow fuel pumps, injectors, and fuel lines.

High-Flow Fuel Pumps

High-flow fuel pumps are essential for ensuring that your engine receives the necessary fuel volume to support increased horsepower. When selecting a pump, consider the following:

  • Flow Rate: Look for pumps that can deliver at least 300-400 liters per hour (LPH) to support 600+ hp.
  • Compatibility: Ensure the pump is compatible with E85, as some pumps may corrode when exposed to ethanol.
  • Reliability: Choose reputable brands known for their reliability and performance in high-power applications.
  • Walbro 450 (GSS342): A popular choice among WRX owners, capable of supporting high horsepower applications.
  • DeatschWerks DW300: Known for its reliability and E85 compatibility, this pump offers a robust flow rate.
  • Radium Engineering Dual Fuel Pump Kit: This kit allows for dual pump setups, providing redundancy and increased flow capacity.

Installing the High-Flow Fuel Pump

Installation of a high-flow fuel pump typically involves the following steps:

  • Remove the fuel tank and access the fuel pump assembly.
  • Replace the stock pump with the high-flow pump, ensuring proper sealing and connections.
  • Reinstall the fuel tank and check for leaks before starting the vehicle.

Choosing Compatible Injectors

Once you’ve upgraded your fuel pump, the next step is to select injectors that can handle the increased fuel demands of E85. The right injectors will ensure optimal fuel delivery and engine performance.

Factors to Consider When Choosing Injectors

  • Flow Rate: Select injectors with a flow rate of at least 1000cc/min to support 600+ hp.
  • Compatibility with E85: Ensure the injectors are rated for E85, as some materials may degrade.
  • Injector Type: Consider using direct injectors for improved fuel atomization and performance.
  • ID1000 (Injector Dynamics): Known for precision and reliability, suitable for high-performance builds.
  • DeatschWerks 1000cc Injectors: These injectors provide excellent flow and are E85 compatible.
  • FIC 1000cc Injectors: A great choice for those looking for high-flow options with good reliability.

Installing the Injectors

Installing new injectors involves several steps:

  • Remove the intake manifold to access the fuel rail and injectors.
  • Carefully remove the old injectors and replace them with new ones, ensuring proper sealing.
  • Reinstall the intake manifold and check for leaks before starting the vehicle.

Additional Considerations for E85 Conversion

Beyond pumps and injectors, there are additional factors to consider when converting your WRX to E85:

  • Fuel Lines: Upgrade to fuel lines that can withstand the corrosive nature of E85.
  • Tuning: A proper tune is essential to maximize performance and ensure engine safety.
  • Fuel Filter: Consider upgrading to a high-flow fuel filter to prevent clogging.

Conclusion

Converting your WRX to an E85 fuel system can unlock significant performance gains, but it requires careful selection of high-flow pumps and compatible injectors. By following the guidelines outlined in this article, you can ensure that your vehicle is equipped to handle the demands of 600+ horsepower, providing an exhilarating driving experience.