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Mitsubishi 4g63 Engine (Eclipse Evo Turbo Motor)

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Mitsubishi 4g63 Engine (Eclipse Evo Turbo Motor) For Sale

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About The Mitsubishi 4G53 Engine

The Mitsubishi 4G63 engine has long been a staple of automotive performance, having powered some of the most iconic Japanese sports cars of the 1990s and 2000s. In this article, we'll dive deep into this legendary engine's history, technical specifications, and performance characteristics and explore why it has become a favorite among car enthusiasts. A Brief History of the Mitsubishi 4G63 Engine The 4G63 engine is part of Mitsubishi's Sirius family of inline-four engines, first introduced in the late 1970s. The 4G63, in particular, debuted in 1981 and quickly gained recognition for its performance and durability. Evolution of the 4G63 Over the years, the 4G63 engine underwent several updates and revisions, adapting to changing emissions standards and performance expectations. Some of these changes include the introduction of a turbocharged variant (4G63T) and improvements to the engine block, cylinder head, and valvetrain components. Technical Specifications Displacement and Bore/Stroke Ratio The 4G63 engine has a displacement of 1,997cc (2.0L) and features a bore and stroke ratio of 85mm x 88mm. This oversquare design allows for high-revving performance and excellent power output. Horsepower and Torque Depending on the application and variant, the 4G63 engine can produce anywhere from 135 to 320 horsepower and 130 to 315 lb-ft of torque. Compression Ratio The compression ratio of the 4G63 engine varies depending on the specific model and application. Non-turbocharged versions typically have a compression ratio of 9.0:1, while turbocharged models have a ratio of 7.8:1 to 9.0:1. Engine Components Cylinder Head The 4G63 engine utilizes an aluminum cylinder head with a DOHC (double overhead camshaft) design. This allows for improved airflow and valve timing compared to a single overhead camshaft (SOHC) design. Pistons and Connecting Rods The pistons and connecting rods in the 4G63 engine are designed for high-performance applications, with forged aluminum pistons and strong, forged steel connecting rods. Crankshaft and Bearings The 4G63 engine features a forged steel crankshaft, which is both durable and lightweight. The engine also employs high-quality main and rod bearings to ensure smooth and reliable operation. Valvetrain and Camshafts The 4G63 engine utilizes a DOHC valvetrain with 16 valves (four per cylinder), allowing for improved airflow and precise valve timing. The camshafts themselves are made from high-strength steel and are designed to optimize engine performance across a wide RPM range. Turbocharging System The 4G63T variant of the engine is equipped with a turbocharger, which significantly increases power output. The turbo system uses a combination of a wastegate and an intercooler to manage boost pressure and optimize air intake temperatures for maximum performance. Fuel Injection System The 4G63 engine uses an advanced electronic fuel injection (EFI) system, which precisely meters fuel delivery to each cylinder. This allows for improved fuel efficiency and better overall performance compared to older, carbureted engines. Cooling and Lubrication System The 4G63 engine features a robust cooling system, including a water pump, radiator, and thermostat, to ensure optimal operating temperatures. The engine also utilizes an efficient oiling system, with a high-volume oil pump and a full-flow oil filter to maintain proper lubrication and minimize wear. 4G63 Engine Variants 4G63T The 4G63T is the turbocharged version of the 4G63 engine, offering increased horsepower and torque for high-performance applications. This variant is most commonly found in the Mitsubishi Lancer Evolution and the Galant VR-4. 4G63-7 Bolt The 4G63-7 bolt engine is a later revision of the 4G63, featuring a 7-bolt flywheel attachment instead of the previous 6-bolt design. This change was made to improve durability and reliability. 4G63-6 Bolt The 4G63-6 bolt engine is the earlier version of the 4G63, utilizing a 6-bolt flywheel attachment. While still a strong and capable engine, the 6-bolt design is generally considered less robust than the later 7-bolt variant. Notable Mitsubishi Cars with the 4G63 Engine Mitsubishi Lancer Evolution The Mitsubishi Lancer Evolution is perhaps the most famous vehicle to utilize the 4G63 engine, with multiple generations of the high-performance sedan featuring the turbocharged 4G63T variant. Mitsubishi Galant VR-4 The Galant VR-4 is another iconic Mitsubishi model that used the 4G63 engine. This all-wheel-drive sports sedan was a predecessor to the Lancer Evolution and played a crucial role in the development of the 4G63 engine. Aftermarket Performance and Tuning The 4G63 engine has a large following in the aftermarket tuning community, with numerous performance upgrades and modifications available. Popular upgrades include turbocharger upgrades, exhaust systems, intake systems, and engine management systems to unlock the engine's full potential. Maintenance and Reliability The 4G63 engine is known for its reliability and durability, with many examples surpassing 200,000 miles with regular maintenance. It is essential to perform routine maintenance, such as oil changes, spark plug replacements, and timing belt replacements, to ensure the engine's longevity. Common Issues and Solutions While the 4G63 engine is generally reliable, some common issues may arise over time, such as oil leaks from the valve cover gasket, timing belt wear, and turbocharger-related issues. Regular inspections and maintenance can help identify and address these problems before they become more severe. The Legacy of the 4G63 Engine The 4G63 engine has left a lasting impact on the automotive world, thanks to its impressive performance, durability, and widespread use in iconic Mitsubishi vehicles. Its reputation as a robust and tunable engine has endeared it to car enthusiasts worldwide, and it continues to be a popular choice for those seeking performance and reliability. Conclusion The Mitsubishi 4G63 engine has earned its place in automotive history as a high-performance workhorse that has powered some of the most iconic Japanese sports cars. With its impressive power output, durability, and potential for tuning and performance upgrades, the 4G63 engine remains a favorite among car enthusiasts. FAQs
  1. What is the difference between the 4G63 and 4G63T engines? The primary difference between these two engines is the presence of a turbocharger in the 4G63T, which significantly increases power output.
  2. What is the main difference between the 6-bolt and 7-bolt 4G63 engines? The primary difference is the flywheel attachment design, with the 7-bolt being considered more robust and reliable than the earlier 6-bolt design.
  3. How much power can a 4G63 engine produce? Depending on the specific application and variant, the 4G63 engine can produce anywhere from 135 to 320 horsepower and 130 to 315 lb-ft of torque.
  4. What kind of maintenance is required for the 4G63 engine? Regular maintenance, such as oil changes, spark plug replacements, and timing belt replacements, is crucial to ensure the engine's longevity and performance.
  5. What are some common issues with the 4G63 engine? Common issues include oil leaks from the valve cover gasket, timing belt wear, and turbocharger-related problems.