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The Subaru WRX is a popular choice among car enthusiasts for its performance, handling, and tuning potential. One of the most exciting modifications you can make to a WRX is converting it to run on E85 fuel. This article will guide you through the process of building a 450 HP WRX E85 conversion that is both powerful and reliable.
Understanding E85 Fuel
E85 is a fuel blend that contains 85% ethanol and 15% gasoline. It has a higher octane rating than regular gasoline, which allows for more aggressive tuning and increased performance. However, it also requires specific modifications to your vehicle to ensure optimal performance and safety.
Benefits of E85 Conversion
- Higher octane rating enables more aggressive tuning.
- Potential for increased horsepower and torque.
- Cleaner combustion results in lower emissions.
- Cost-effective compared to premium gasoline in some regions.
Key Components for a 450 HP E85 Conversion
To achieve a reliable 450 HP from your WRX on E85, you will need to upgrade several components. Here are the essential parts to consider:
- Fuel System: Upgraded fuel pump, injectors, and fuel lines.
- Tuning: A custom tune that accommodates E85’s properties.
- Engine Internals: Forged pistons and rods for durability.
- Turbocharger: A larger turbo to support increased airflow.
- Exhaust System: High-flow exhaust components to reduce back pressure.
Fuel System Upgrades
The fuel system is critical for an E85 conversion. You will need to replace the stock fuel pump with a higher flow pump that can handle the increased fuel demand. Additionally, larger fuel injectors will ensure that the engine receives the proper fuel mixture.
Tuning for E85
After upgrading the fuel system, a proper tune is essential. E85 has different combustion characteristics than gasoline, so a custom tune will optimize your engine’s performance and prevent issues such as knocking or running too lean.
Engine Internals
To handle the increased power, consider upgrading the engine internals. Forged pistons and rods are more robust and can withstand the higher pressures and temperatures associated with E85 performance builds.
Turbocharger Selection
A larger turbocharger can significantly increase airflow and performance. Choose a turbo that matches your power goals and is compatible with your WRX’s engine management system.
Exhaust System
Upgrading the exhaust system is crucial for reducing back pressure and improving exhaust flow. Consider high-flow catalytic converters and performance mufflers to enhance your WRX’s sound and performance.
Safety Considerations
While building a high-performance WRX is exciting, safety should always be a priority. Here are some key safety considerations:
- Ensure fuel lines are rated for E85 to prevent corrosion.
- Regularly check for fuel leaks in the upgraded system.
- Monitor engine temperatures to avoid overheating.
- Use a wideband O2 sensor to maintain proper air-fuel ratios.
Conclusion
Converting your WRX to run on E85 can unlock significant performance gains, but it requires careful planning and execution. By upgrading key components and prioritizing safety, you can build a reliable 450 HP WRX E85 conversion that delivers excitement on the road and track.