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The 4G63 engine has a legendary status among car enthusiasts, particularly for those who own the Mitsubishi Eclipse. Known for its robust design and potential for tuning, achieving over 600 horsepower is a thrilling challenge. In this article, we will explore the ultimate modifications to unlock the full potential of your 4G63 engine, focusing on forged internals and custom tuning.
Understanding the 4G63 Engine
The 4G63 is a 2.0-liter inline-four engine that has powered various Mitsubishi models, including the Eclipse, Talon, and Galant. Its design features a DOHC setup and a turbocharger, making it an excellent candidate for performance upgrades. The engine’s ability to handle significant power increases is one of the reasons it has a dedicated following.
Key Modifications for 600+ HP
To reach the 600+ horsepower mark, several modifications are essential. Each component plays a critical role in ensuring that the engine can handle the increased power while maintaining reliability.
- Forged Internals
- Upgraded Turbocharger
- High-Performance Fuel Injectors
- Enhanced Intercooler
- Custom Engine Management System
Forged Internals
Forged internals are crucial for any serious power build. The stock components may not withstand the stress of high horsepower. Upgrading to forged pistons and connecting rods will provide the necessary strength and durability.
- Forged Pistons: These are designed to handle higher temperatures and pressures, reducing the risk of failure.
- Forged Connecting Rods: They offer increased strength and reduced weight, allowing for better performance.
Upgraded Turbocharger
A larger turbocharger is essential for achieving the desired horsepower. Upgrading to a turbo that can flow more air will significantly increase power output.
- Garrett GT30 or GT35: These turbos are popular choices for 600+ HP builds, providing excellent boost response and power.
- Turbo Upgrades: Consider options with adjustable wastegates and larger compressor wheels for better performance.
High-Performance Fuel Injectors
To support the increased air flow from the upgraded turbo, high-performance fuel injectors are necessary. These injectors ensure that the engine receives the right amount of fuel to match the air intake.
- Injector Size: Look for injectors rated at least 1000cc/min to handle the increased fuel demands.
- Fuel Pump Upgrade: A high-flow fuel pump is essential to keep up with the increased injector size.
Enhanced Intercooler
An upgraded intercooler is vital for maintaining optimal air temperatures. Cooler air is denser and can lead to more power and efficiency.
- Front-Mount Intercooler: A larger FMIC can significantly reduce intake temperatures, improving performance.
- Intercooler Piping: Use larger diameter piping to minimize pressure drops and improve airflow.
Custom Engine Management System
A custom engine management system is critical for tuning the engine to achieve the desired power levels. This allows for adjustments in fuel maps, ignition timing, and boost control.
- ECU Tuning: Consider options like AEM, Haltech, or Link for comprehensive tuning capabilities.
- Dyno Tuning: A professional dyno tune will ensure that your setup runs smoothly and efficiently.
Supporting Modifications
In addition to the primary modifications, several supporting upgrades can enhance performance and reliability.
- Upgraded Exhaust System
- High-Performance Clutch
- Improved Cooling System
- Suspension Upgrades
Upgraded Exhaust System
An aftermarket exhaust system will reduce back pressure and improve exhaust flow, allowing the engine to breathe better.
- 3-inch Turbo Back Exhaust: This size is ideal for high horsepower applications.
- High-Flow Catalytic Converter: Helps to maintain emissions while improving performance.
High-Performance Clutch
With increased power comes the need for a stronger clutch. A high-performance clutch will ensure that power is effectively transferred to the wheels without slippage.
- Stage 3 Clutch Kits: These kits are designed to handle high horsepower and torque.
- Lightweight Flywheel: A lightweight flywheel can improve throttle response and reduce rotational mass.
Improved Cooling System
Keeping the engine cool is crucial for reliability at high horsepower. Upgrading the cooling system can prevent overheating during extended use.
- High-Performance Radiator: A larger radiator can improve cooling efficiency.
- Upgraded Water Pump: Ensures better coolant flow throughout the engine.
Suspension Upgrades
With increased power, handling becomes essential. Upgrading the suspension will improve traction and stability during acceleration.
- Coilover Kits: Allow for adjustable ride height and improved handling.
- Upgraded Sway Bars: Help to reduce body roll during cornering.
Conclusion
Achieving 600+ horsepower from a 4G63 engine is an exciting endeavor that requires careful planning and quality modifications. By focusing on forged internals, upgraded turbochargers, and a custom tuning approach, you can unlock the full potential of your Mitsubishi Eclipse. With the right supporting modifications, your vehicle will not only be powerful but also reliable and fun to drive.