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The 4G63 engine has gained a reputation among car enthusiasts for its performance potential, especially when modified to exceed 400 horsepower. To achieve such power levels reliably, upgrading the fuel system is essential. This article will explore the necessary supporting modifications to ensure your 4G63 can handle the increased demands of high-performance driving.
Understanding the 4G63 Engine
The 4G63 engine, a turbocharged inline-four, is known for its versatility and tuning potential. Originally found in models like the Mitsubishi Eclipse and Galant, it has become a favorite among tuners. To push this engine over the 400 hp mark, a well-planned upgrade path is crucial.
Key Components of a Fuel System Upgrade
When upgrading the fuel system for the 4G63, several key components must be considered to support higher horsepower levels:
- Fuel Pump
- Fuel Injectors
- Fuel Pressure Regulator
- Fuel Lines
- Fuel Rail
- ECU Tuning
Fuel Pump
The fuel pump is the heart of the fuel system. For power levels exceeding 400 hp, an upgrade to a high-flow fuel pump is necessary. Popular options include:
- Walbro 255 LPH
- AEM 340 LPH
- DeatschWerks DW300
These pumps can deliver the required fuel volume and pressure to support high horsepower applications.
Fuel Injectors
Upgrading fuel injectors is crucial to ensure that the engine receives adequate fuel. For 400 hp setups, consider injectors rated between 750cc to 1000cc. Recommended brands include:
- Injector Dynamics
- DeatschWerks
- FIC (Fuel Injector Clinic)
Choosing the right injector size is important for achieving the desired air-fuel ratio.
Fuel Pressure Regulator
A quality fuel pressure regulator is needed to maintain consistent fuel pressure across the injectors. Adjustable regulators allow for fine-tuning based on your setup. Options to consider include:
- Aeromotive Adjustable Regulator
- Fuel Lab Regulator
These regulators help ensure that fuel delivery is optimized for performance.
Fuel Lines
Upgrading fuel lines to larger diameter hoses can reduce fuel flow restriction. Consider using:
- -6AN or -8AN fuel lines
- High-quality fuel line materials
Using proper fittings and secure connections is essential to prevent leaks and maintain fuel pressure.
Fuel Rail
A high-performance fuel rail can improve fuel distribution to the injectors. Aftermarket options often feature larger diameters and better flow characteristics. Look for:
- Upgraded aftermarket fuel rails
- Compatibility with your chosen injectors
These rails help ensure that each injector receives the necessary fuel supply.
ECU Tuning
After upgrading the fuel system, proper ECU tuning is essential to maximize performance. This involves:
- Reprogramming the ECU to accommodate new fuel maps
- Adjusting for changes in air-fuel ratio
- Optimizing ignition timing
Using a reputable tuning service or standalone ECU can yield significant gains in performance and reliability.
Additional Considerations for High-Power Builds
Aside from the fuel system, there are other modifications to consider when aiming for over 400 hp:
- Upgraded turbocharger
- Performance intercooler
- Exhaust system upgrades
- Stronger internal engine components
Each of these elements plays a role in achieving and maintaining high power levels while ensuring engine longevity.
Conclusion
Upgrading the fuel system is a critical step in supporting 4G63 power levels over 400 hp. By focusing on key components such as the fuel pump, injectors, regulator, lines, rail, and ECU tuning, enthusiasts can ensure their engine performs reliably and efficiently. With the right modifications and attention to detail, the 4G63 can reach impressive power figures while maintaining drivability.