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The 4G63 engine, a staple in the Mitsubishi performance community, has garnered a reputation for its tuning potential. Many enthusiasts have taken this engine from its stock configuration to impressive power levels, including a remarkable 400 horsepower. In this article, we will explore the journey of the 4G63 from stock to 400 hp, detailing the modifications, tuning strategies, and real-world experiences of those who have pushed this engine to its limits.
Understanding the 4G63 Engine
The 4G63 is a 2.0-liter inline-four engine that was originally designed for use in the Mitsubishi Eclipse and other models. It features a DOHC design and has been a favorite among tuners due to its robust construction and inherent tuning capabilities. While the stock version produces around 190 hp, many enthusiasts have unlocked its potential through various modifications.
Stock Specifications
Before diving into modifications, it’s essential to understand the stock specifications of the 4G63 engine. Here are the key details:
- Engine Type: 2.0L Inline-4, DOHC
- Stock Horsepower: Approximately 190 hp
- Torque: Approximately 205 lb-ft
- Compression Ratio: 8.5:1
Key Modifications for Power Gains
To achieve 400 hp, several modifications are necessary. Below are the most common upgrades that enthusiasts pursue:
- Upgraded Turbocharger: A larger turbo, such as the Garrett GT30, allows for increased airflow and boost pressure.
- Fuel System Upgrade: High-flow fuel injectors and a larger fuel pump ensure adequate fuel delivery.
- ECU Tuning: Custom tuning of the engine management system optimizes performance and reliability.
- Performance Exhaust: A free-flowing exhaust system reduces back pressure and enhances turbo spool.
- Intercooler Upgrade: A larger front-mount intercooler helps keep intake temperatures low, improving efficiency.
Real-World Power Gains
Many enthusiasts have documented their experiences with the 4G63 engine after modifications. Here are some real-world power gain examples:
- Example 1: A 1995 Mitsubishi Eclipse with a built 4G63 reached 400 hp with a GT30 turbo, upgraded injectors, and ECU tuning.
- Example 2: A 1993 Mitsubishi Galant with similar modifications achieved 425 hp on a dyno, showcasing the engine’s potential.
- Example 3: A modified 4G63 in a Lancer Evolution produced 450 hp, demonstrating the versatility of the engine across different platforms.
Challenges and Considerations
While achieving 400 hp is an exciting goal, there are challenges and considerations to keep in mind:
- Reliability: Pushing the engine to high power levels can impact reliability. It’s crucial to ensure proper tuning and maintenance.
- Heat Management: Increased power leads to higher temperatures, necessitating better cooling solutions.
- Transmission Upgrades: The stock transmission may struggle with the increased power, requiring upgrades to handle the added stress.
Conclusion
The journey from stock to 400 hp in a 4G63 engine is a testament to the potential of this platform. With the right modifications, tuning, and attention to detail, enthusiasts can unlock impressive power while maintaining reliability. Whether you’re a seasoned tuner or a newcomer, the 4G63 offers a rewarding experience in the world of performance engines.