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The 4G63 engine has earned a legendary status among car enthusiasts, particularly those who own the Mitsubishi Eclipse. With its robust design and potential for high horsepower, many builders have successfully pushed this engine beyond 600 horsepower. In this article, we will explore various turbo setups, internal modifications, and tuning strategies that can help you achieve and maintain these impressive power levels.
Understanding the 4G63 Engine
The 4G63 is a 2.0L inline-four engine that features a DOHC design, making it a popular choice for performance builds. Known for its strength and reliability, the engine is capable of handling significant power increases when modified correctly. Before diving into builds, it’s essential to understand the engine’s components and how they interact.
Key Components of the 4G63
- Block: The iron block provides a solid foundation for high horsepower builds.
- Cylinder Head: The DOHC head allows for better airflow, crucial for high-performance applications.
- Crankshaft: A forged crankshaft is recommended for builds aiming for 600+ HP.
- Pistons and Rods: Upgrading to forged pistons and rods is critical for reliability under high boost.
Turbocharger Options
Choosing the right turbocharger is essential for achieving over 600 horsepower with the 4G63. There are several options available, each offering different characteristics that can suit various build goals.
Popular Turbo Choices
- Garrett GT35R: Known for its responsiveness and ability to support high horsepower levels.
- FP Black: A favorite among 4G63 builders, it provides excellent power and spool characteristics.
- Ball Bearing Turbos: These offer quicker spool times and higher efficiency, ideal for street and track use.
Internal Modifications for High Power
To support high horsepower levels, internal modifications are necessary. This includes upgrading components that can handle increased stress and heat.
Piston Upgrades
Forged pistons are a must for any serious build aiming for 600+ HP. They offer better strength and thermal stability compared to stock pistons.
Connecting Rods
Upgrading to forged connecting rods is critical. They are designed to withstand the forces generated by high horsepower and boost levels, ensuring reliability.
Crankshaft Strengthening
A forged crankshaft is recommended for builds above 600 HP. This upgrade provides the necessary strength to handle the increased power output.
Tuning Strategies for 600+ HP Builds
Tuning is a critical aspect of achieving reliable and safe 600+ HP from your 4G63. Proper tuning ensures that the engine runs efficiently and safely under high boost.
ECU Tuning Options
- Standalone ECU: Offers the most flexibility and control over engine parameters.
- Chipped ECU: A cost-effective option that allows for tuning with stock components.
- Tuning Software: Using software like ECUFlash or EcuTek can provide real-time adjustments and monitoring.
Boost Control
Implementing a reliable boost control system is crucial for maintaining power levels while ensuring engine safety. Options include electronic boost controllers and manual boost controllers.
Fuel System Upgrades
- Fuel Injectors: Upgrading to larger injectors is necessary to support higher fuel demands.
- Fuel Pump: A high-flow fuel pump ensures adequate fuel delivery under boost.
- Fuel Pressure Regulator: Maintaining consistent fuel pressure is vital for performance and reliability.
Conclusion
Building a 4G63 Eclipse for over 600 horsepower requires careful planning and execution. By selecting the right turbo, upgrading internal components, and implementing effective tuning strategies, you can achieve impressive power levels while maintaining reliability. Whether you are a seasoned builder or just starting, understanding these aspects will help you create a high-performance 4G63 engine that stands out on the road or track.