## 4G63 Engine: A Comprehensive Guide
Introduction
The Mitsubishi 4G63 engine is a legendary powerplant that has powered numerous iconic performance vehicles over the years. Known for its durability, high-revving nature, and tunability, the 4G63 has become a favorite among enthusiasts worldwide. In this article, we will explore the history, specifications, and applications of the 4G63 engine.
History and Development
The 4G63 was first introduced in 1982 as a replacement for the Sirius engine in the Mitsubishi Galant and Lancer. It was initially available in a naturally aspirated form with a displacement of 1.6 liters. Over the years, the 4G63 underwent several revisions and upgrades, including the addition of turbocharging, increased displacement, and various performance enhancements.
Specifications
The 4G63 engine is a four-cylinder, inline engine with a cast-iron block and aluminum head. It features a double-overhead camshaft (DOHC) design with four valves per cylinder. The bore and stroke measurements vary depending on the specific application, but most versions have a displacement between 1.8 and 2.4 liters.
**Key Specifications:**
– Engine Type: Inline-4
– Configuration: DOHC, 4 Valves per Cylinder
– Displacement: 1.8 – 2.4 Liters
– Bore x Stroke: Varies by Application
– Compression Ratio: 8.5:1 – 10.0:1
– Horsepower (Naturally Aspirated): 115 – 170 hp
– Horsepower (Turbocharged): 200 – 360 hp
– Torque (Naturally Aspirated): 140 – 155 lb-ft
– Torque (Turbocharged): 200 – 370 lb-ft
Applications
The 4G63 engine has been used in a wide variety of Mitsubishi vehicles, including performance models and daily drivers. Some of the most notable applications include:
– **Mitsubishi Lancer Evolution:** The Lancer Evolution is a high-performance sedan that uses a turbocharged version of the 4G63 engine. Over the course of its production, the Lancer Evolution has gone through several generations, each with a more powerful 4G63 engine.
– **Mitsubishi Eclipse:** The Eclipse is a sports coupe that was available with a naturally aspirated or turbocharged 4G63 engine. The turbocharged models were particularly popular due to their performance capabilities.
– **Mitsubishi Galant VR-4:** The Galant VR-4 is a high-performance version of the Galant sedan that came with a turbocharged 4G63 engine. It was produced from 1989 to 1999 and was considered one of the fastest sedans of its time.
– **Mitsubishi 3000GT:** The 3000GT is a sports car that was available with a twin-turbocharged 4G63 engine. The 3000GT was praised for its performance and handling, and it remains a sought-after collectible today.
Performance and Tuning
The 4G63 engine is known for its high-revving nature and tunability. With proper modifications and tuning, the 4G63 can produce significantly more horsepower and torque than its stock configuration. Enthusiasts have pushed the limits of the 4G63, with some builds achieving over 1000 horsepower.
Reliability and Maintenance
The 4G63 engine is generally considered to be a reliable unit. However, like any engine, it requires proper maintenance to ensure longevity. Regular oil changes, timing belt replacements, and other scheduled servicing are crucial for preventing problems.
Conclusion
The Mitsubishi 4G63 engine is a true icon in the automotive world. Its combination of durability, performance, and tunability has made it a favorite among enthusiasts for decades. Whether it’s powering a high-flying Lancer Evolution or a vintage Galant VR-4, the 4G63 continues to impress with its legendary capabilities.
