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The Subaru WRX is a beloved performance vehicle known for its rally heritage and turbocharged power. Enthusiasts are always looking for ways to enhance the performance of their WRX, and one popular method is converting to E85 fuel. This article will explore how to achieve over 300 horsepower with an $800 fuel system upgrade.
Understanding E85 Fuel
E85 is a fuel blend consisting of 85% ethanol and 15% gasoline. It offers several benefits for performance vehicles, including:
- Higher octane rating, which allows for more aggressive tuning.
- Increased power potential due to the cooler combustion temperatures.
- Environmental benefits, as ethanol is renewable and produces fewer emissions.
Benefits of Converting to E85
Converting your Subaru WRX to run on E85 can provide significant performance gains. Here are some of the key benefits:
- Boost in horsepower and torque thanks to the higher octane rating.
- Improved throttle response and overall engine efficiency.
- Potential for increased fuel economy under certain driving conditions.
Required Upgrades for E85 Conversion
To successfully convert your WRX to E85, you will need to upgrade your fuel system. The following components are essential:
- High-flow fuel pump to handle the increased fuel demand.
- Upgraded fuel injectors to ensure proper fuel delivery.
- Fuel lines and fittings compatible with ethanol to prevent corrosion.
- ECU tuning to optimize performance for E85 fuel.
Step-by-Step Upgrade Process
1. Fuel Pump Upgrade
The first step in the conversion process is replacing the stock fuel pump with a high-flow pump. This upgrade ensures that your WRX can deliver the necessary fuel volume for E85. Popular options include:
- Walbro 450LPH fuel pump
- DeatschWerks DW300 fuel pump
2. Installing Upgraded Fuel Injectors
Next, you will need to install larger fuel injectors to accommodate the increased fuel flow required for E85. Look for injectors that offer:
- Flow rates between 1000cc and 1200cc.
- Compatibility with E85 fuel.
3. Fuel Lines and Fittings
Standard fuel lines may not be suitable for E85 due to its corrosive nature. Upgrading to ethanol-compatible lines is crucial. Consider:
- AN fittings and braided stainless steel lines.
- PTFE-lined fuel hoses for maximum durability.
4. ECU Tuning
After all hardware upgrades are complete, ECU tuning is necessary to optimize your WRX’s performance on E85. A professional tuner will adjust:
- Fuel maps to accommodate the different fuel characteristics.
- Ignition timing for maximum power and efficiency.
Cost Breakdown of the Upgrade
The total cost of converting your WRX to E85 can be approximately $800, broken down as follows:
- High-flow fuel pump: $150 – $250
- Upgraded fuel injectors: $300 – $400
- Fuel lines and fittings: $100 – $150
- ECU tuning: $200 – $300
Conclusion
Converting your Subaru WRX to E85 is an effective way to unlock additional horsepower and improve overall performance. With an investment of around $800, you can enjoy the benefits of higher octane fuel and enhanced tuning potential. Always consult with a professional for installation and tuning to ensure optimal results.