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The Mitsubishi Lancer Evolution X, or Evo X, is a performance-oriented sedan that has captured the hearts of car enthusiasts worldwide. One of the critical components in unlocking the full potential of this vehicle is upgrading its fuel system. In this article, we will explore how to upgrade your Evo X’s fuel system from stock to support over 400 horsepower using Walbro fuel pumps.
Understanding the Fuel System
The fuel system in your Evo X is responsible for delivering the right amount of fuel to the engine for optimal performance. The stock fuel system is designed to support a certain level of horsepower, but as you increase power through modifications, the stock system may become inadequate.
Key Components of the Fuel System
- Fuel Pump
- Fuel Injectors
- Fuel Lines
- Fuel Pressure Regulator
Each component plays a vital role in ensuring your engine receives the correct amount of fuel. Upgrading the fuel pump is often the first step in enhancing your Evo X’s fuel system.
Choosing the Right Walbro Pump
Walbro is a well-respected name in the performance fuel pump market. Their pumps are known for reliability and high flow rates, making them ideal for high-performance applications. When selecting a Walbro pump for your Evo X, consider the following options:
- Walbro 255 LPH (GSS342)
- Walbro 450 LPH (GSS307)
The 255 LPH pump is suitable for moderate power upgrades, while the 450 LPH pump is designed for those pushing beyond 400 horsepower. Both pumps require additional modifications to the fuel system for optimal performance.
Upgrading the Fuel Pump
Upgrading the fuel pump in your Evo X involves several steps. Here’s a brief overview of the process:
- Gather necessary tools and parts.
- Relieve fuel pressure.
- Remove the fuel pump assembly from the tank.
- Replace the stock pump with the Walbro pump.
- Reassemble and reinstall the fuel pump assembly.
It’s essential to follow a detailed guide or video tutorial specific to your model for precise instructions during the upgrade.
Upgrading Fuel Injectors
After upgrading the fuel pump, the next step is to consider upgrading the fuel injectors. Stock injectors may not provide enough fuel for higher horsepower levels. Upgrading to larger injectors ensures that your engine receives the necessary fuel for optimal performance.
- Injector Dynamics ID1050x
- FIC 1000cc Injectors
Both options are popular among Evo X enthusiasts and can support power levels exceeding 400 horsepower.
Fuel Lines and Pressure Regulator
When upgrading the fuel system, it’s also crucial to examine the fuel lines and pressure regulator. Upgrading to larger diameter fuel lines can help reduce fuel flow resistance, ensuring that your engine receives adequate fuel at higher power levels.
- AN-6 or AN-8 Fuel Lines
- Adjustable Fuel Pressure Regulator
An adjustable fuel pressure regulator allows you to fine-tune the fuel pressure to match your engine’s needs, providing better performance and reliability.
Tuning Your Evo X
After upgrading the fuel system, proper tuning is essential to maximize performance and ensure engine safety. A professional tune will adjust the engine’s air-fuel ratio, ignition timing, and other parameters to suit the new fuel system components.
- Dyno Tuning
- ECU Reflash
- Wideband O2 Sensor Installation
Investing in a proper tuning session can make a significant difference in performance and reliability, especially when pushing your Evo X to its limits.
Conclusion
Upgrading your Evo X’s fuel system is a crucial step in achieving over 400 horsepower. By selecting the right Walbro pump, upgrading fuel injectors, and ensuring the entire system is optimized, you can unlock the full potential of your vehicle. Remember to prioritize proper tuning to ensure your upgrades work harmoniously for the best performance.