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The Mitsubishi Eclipse equipped with the 4G63 engine is a favorite among car enthusiasts, particularly those looking to achieve high horsepower without extensive modifications. In this article, we will explore the key modifications necessary to reach 400+ horsepower while keeping the stock block intact, as well as the limitations that come with this ambitious goal.
Understanding the 4G63 Engine
The 4G63 engine is a turbocharged inline-four engine that has gained a reputation for its robustness and tuning potential. Originally found in various Mitsubishi models, including the Eclipse, this engine is known for its ability to handle significant power increases with the right modifications.
Key Modifications for Achieving 400+ HP
To achieve over 400 horsepower from a stock block 4G63, several critical modifications must be made. Below are the essential upgrades that can help you reach this power level.
- Upgraded Turbocharger: Replacing the factory turbo with a larger unit will provide the necessary airflow to increase horsepower.
- High-Performance Fuel Injectors: Upgrading to larger injectors ensures that the engine receives enough fuel to match the increased air flow.
- Aftermarket Fuel Pump: A high-flow fuel pump is essential to supply the required fuel pressure for high-performance injectors.
- ECU Tuning: Custom tuning of the engine’s ECU is crucial to optimize performance and ensure the engine runs efficiently with the new modifications.
- Upgraded Intercooler: A larger intercooler helps to reduce intake temperatures, improving performance and reliability.
- Exhaust System Upgrade: A performance exhaust system improves exhaust flow, allowing the engine to expel gases more efficiently.
- Intake System Enhancement: An aftermarket intake system can improve airflow into the engine, contributing to better performance.
Limitations of the Stock Block
While achieving 400+ horsepower with a stock block 4G63 is possible, there are limitations to consider. Understanding these limitations can help you make informed decisions about your modifications.
- Engine Reliability: Pushing the stock block too far can lead to engine failure. It’s essential to monitor performance and avoid excessive tuning.
- Boost Levels: Higher boost levels can significantly increase horsepower but also put additional strain on engine components.
- Heat Management: Increased horsepower generates more heat, which can lead to overheating if not managed properly.
- Supporting Modifications: Certain modifications, such as upgraded pistons and rods, may be necessary for sustained high horsepower, even if they alter the stock block.
Conclusion
Achieving 400+ horsepower with a stock block 4G63 Eclipse is an exciting challenge for any enthusiast. By focusing on key modifications and understanding the limitations of the stock engine, you can unlock significant power while maintaining reliability. Always remember to tune carefully and monitor your engine’s health to ensure a successful and enjoyable performance upgrade.