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The 4G63 engine is a legendary powerplant that has earned its place in automotive history, particularly among enthusiasts of the Mitsubishi Eclipse and Lancer Evolution. To unlock its full potential, many car owners turn to supporting modifications. This article explores essential upgrades for fuel systems, ECUs, and camshafts that can significantly enhance the performance of the 4G63 engine.
Understanding the 4G63 Engine
The 4G63 is a 2.0-liter inline-four engine that features a DOHC design and is known for its turbocharged variants. It has been widely used in various Mitsubishi models and has a strong aftermarket support base. Understanding the engine’s characteristics is crucial for selecting the right supporting modifications.
Fuel Systems
A proper fuel system is vital for maximizing the performance of the 4G63. Upgrading the fuel system ensures that the engine receives the right amount of fuel, especially when increasing boost levels.
Fuel Injectors
Upgrading to larger fuel injectors allows for increased fuel flow, which is essential for higher horsepower builds. Consider the following options:
- Stock 450cc injectors for mild builds.
- 550cc or 650cc injectors for moderate performance upgrades.
- Up to 1000cc injectors for high-performance applications.
Fuel Pumps
Along with injectors, the fuel pump must be upgraded to support the increased fuel demands. Popular choices include:
- Walbro 255lph fuel pump for a good balance of performance and cost.
- DeatschWerks fuel pumps for higher flow rates and reliability.
Engine Control Units (ECUs)
The ECU is the brain of the engine, controlling fuel delivery and ignition timing. Upgrading the ECU can unlock additional performance and tuning capabilities.
Tuning Options
When considering ECU upgrades, you have several options:
- Stock ECU with a chip for basic tuning.
- Aftermarket ECUs like AEM or Haltech for advanced tuning features.
- Standalone ECUs for complete control over engine parameters.
Benefits of Upgrading the ECU
Upgrading the ECU offers several benefits, including:
- Improved fuel efficiency.
- Better throttle response.
- Enhanced power output through optimized tuning.
Upgraded Cams
Camshaft upgrades can significantly impact the performance of the 4G63 engine by improving airflow and increasing power. Choosing the right cam profile is essential for achieving your performance goals.
Types of Camshafts
There are various types of camshafts available for the 4G63:
- Stock replacement cams for reliability.
- Performance cams for increased lift and duration.
- Custom grind cams for specific performance needs.
Installation Considerations
When installing upgraded cams, consider the following:
- Ensure proper timing alignment.
- Upgrade valve springs to handle increased lift.
- Consider tuning the ECU to match the new cam profile.
Conclusion
Supporting modifications for the 4G63 engine, including upgraded fuel systems, ECUs, and camshafts, are essential for unlocking its full performance potential. By carefully selecting and implementing these upgrades, enthusiasts can enjoy a more powerful and responsive engine that delivers an exhilarating driving experience.