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The Subaru WRX has long been a favorite among car enthusiasts and track racers alike. With its rally heritage and turbocharged power, the WRX offers a thrilling driving experience. For those looking to push the limits further, upgrading to a flex fuel setup can unlock significant power gains. This article will guide you through the process of building a track-ready WRX that can achieve over 600 horsepower with custom intercooler and exhaust systems.
Understanding Flex Fuel Systems
Flex fuel systems allow your vehicle to run on a mixture of gasoline and ethanol. Ethanol has a higher octane rating than gasoline, which enables more aggressive tuning and power output. Here are some key benefits of switching to a flex fuel setup:
- Higher power potential due to increased octane.
- Improved throttle response and performance.
- Environmental benefits from using renewable fuel sources.
Choosing the Right Components
To achieve 600+ horsepower, you need to select the right components carefully. Here are the essential upgrades to consider:
- Fuel System: Upgraded fuel injectors and fuel pump to handle higher ethanol content.
- Intercooler: A custom intercooler to reduce intake temperatures and improve performance.
- Exhaust System: A high-flow exhaust system to enhance airflow and reduce back pressure.
- Tuning: A professional tune to optimize performance and ensure reliability.
Upgrading the Intercooler
The intercooler plays a critical role in maintaining optimal air temperatures for better performance. An upgraded intercooler will help your WRX handle the increased power output. Here’s what to look for:
- Core Size: A larger core will provide better cooling efficiency.
- Material: Choose aluminum for lightweight and durability.
- End Tank Design: Look for designs that minimize turbulence and improve airflow.
Custom Exhaust Systems
A custom exhaust system is essential for maximizing the performance of your WRX. Here are key considerations:
- Diameter: A larger diameter pipe will reduce back pressure and improve exhaust flow.
- Muffler Design: Choose a design that balances sound and performance.
- Material: Stainless steel is recommended for its resistance to corrosion and durability.
Tuning for Performance
After upgrading your components, a professional tune is crucial to unleash the full potential of your WRX. A proper tune will ensure that your fuel and timing maps are optimized for the new setup. Consider the following:
- Dyno Tuning: A dyno session will provide accurate data for tuning adjustments.
- Flex Fuel Sensor: Install a flex fuel sensor for real-time ethanol content monitoring.
- Adjustable Maps: Consider tuning for different fuel types to maximize versatility.
Final Thoughts
Building a track-ready WRX with a flex fuel system and custom intercooler and exhaust systems is an exciting project that can yield impressive results. With the right components and tuning, you can achieve over 600 horsepower and enjoy a thrilling driving experience on the track. Remember to always prioritize quality parts and professional installation to ensure reliability and performance.