| Home / Car Engines / Mitsubishi Engines / Mitsubishi 4G63T |
Mitsubishi 4G63T Specifications
| Engine Model: Mitsubishi 4G63T |
| Engine Type: 4-cycle 4-cylinder DOHC 16-valve turbocharged liquid-cooled gasoline |
| Total Displacement: 121.8 cu.in (1.99 L) |
| Rated Engine Power: 190-286 Hp (142-213 kW) at 6000 rpm |
| Fuel System Type: Multi-point electronic fuel injection |
____________________________________________________________________________________
- Mitsubishi 4G67 Engine Specifications
- Mitsubishi 4G91 Engine Specifications
- Mitsubishi 4G93 Engine Specifications
| General Technical Data |
The Mitsubishi 4G63T is turbocharged four-cylinder engines. Introduced in the late 1980s, this 2.0-liter turbocharged variant of the 4G63 engine family powered numerous Mitsubishi performance models, most notably the Lancer Evolution series from Evo I through Evo IX. Its cast-iron block, robust forged-steel internals in various versions, high-flow aluminum cylinder head, advanced turbocharging systems, and highly adaptable electronic controls allowed it to compete successfully in rally racing, touring cars, and street performance applications worldwide.
The 4G63T became legendary among enthusiasts
due to its immense upgrade potential, often supporting power outputs far
beyond factory specifications while maintaining mechanical reliability.
Even decades after its introduction, it remains one of the most
respected high-performance four-cylinder engines in automotive history.
The Mitsubishi 4G63T has a displacement of 1,997 cc (121.8 cubic
inches). Bore measures approximately 85.0 mm (3.35 inches) and stroke is
about 88.0 mm (3.46 inches), forming a long-stroke configuration that
enhances torque delivery. Depending on generation and market, the
compression ratio typically ranges from 8.5:1 to 9.0:1.
Factory power output varies significantly: early versions produced between 190 and 240 horsepower (142 to 179 kW) at around 6,000 rpm, while later Lancer Evolution models reached 276 to 286 horsepower (206 to 213 kW) as per the Japanese gentlemen-s agreement. Torque output ranges from 270 to 400 Nm (199 to 295 lb-ft), depending on turbocharger and tuning calibration.
Idle speed is generally around 750 - 50 rpm,
and redline varies between 7,000 and 7,600 rpm depending on model year.
The firing order is the conventional 1-3-4-2. The engine uses
sophisticated turbocharging systems, intercooling, and electronic engine
management to achieve strong mid-range and high-rpm performance.
The 4G63T uses a cast-iron cylinder block renowned for exceptional
strength, making it suitable for high boost pressures and extreme
performance modifications. The crankshaft is forged steel and fully
counterweighted, supported by five heavy-duty main bearings for smooth
high-rpm operation.
Pistons are reinforced aluminum alloy, with turbo versions featuring stronger piston crowns, thicker ring lands, and enhanced cooling channels. The connecting rods vary by generation: early versions use robust forged rods, while later models employ lightweight yet strong high-strength steel rods. Wrist pins are full-floating for reduced friction.
Cylinder walls are thick and capable of
supporting substantial aftermarket overbores. Internal oil passages
ensure stable lubrication to all critical components, while piston
cooling jets help regulate combustion temperatures. The block-s
durability is one of the main reasons the 4G63T is capable of handling
very high power output with minimal internal modification.
The aluminum cylinder head on the 4G63T is designed for high airflow and
strong combustion efficiency. Dual overhead camshafts (DOHC) operate
four valves per cylinder, providing excellent breathing characteristics.
Earlier versions used fixed valve timing, while later Lancer Evolution
models incorporate Mitsubishi’s variable valve timing (MIVEC) on the
intake camshaft. Valve diameters vary among generations but generally
offer high flow capacity.
Camshafts actuate valves using bucket tappets, which provide stability at high rpm. The combustion chamber is engineered for strong tumble characteristics and rapid flame propagation under boost. Intake ports are shaped to promote high velocity, while exhaust ports are designed for efficient evacuation of hot gases. The camshafts are driven by a high-strength timing belt, with replacement required at regular maintenance intervals. The head also contains coolant channels for temperature control, essential for turbocharged operation.
| Fuel System |
The fuel system uses electronic multi-point fuel injection, delivering precise fuel metering to each cylinder. High-flow injectors feed fuel into the intake ports, sized appropriately for the turbocharger and power level of each version. Fuel pressure typically measures around 300 to 350 kPa (43 to 51 psi). Turbocharged variants require premium unleaded gasoline with a minimum octane rating of 98 RON (93 AKI).
The ECU controls injection timing and duration based on signals from the mass-air-flow sensor, manifold-pressure sensor, throttle-position sensor, oxygen sensors, crank-angle sensor, and coolant-temperature sensor. Later models use more advanced airflow and pressure-based algorithms for precise tuning. Fuel-delivery upgrades are common in tuned applications, with the factory system offering significant overhead for moderate power increases.
| Lubrication System |
The lubrication system is a full-pressure wet-sump design using a crankshaft-driven trochoid oil pump. Oil capacity typically ranges between 4.5 and 5.0 liters (4.7 to 5.3 US quarts). Oil flows through a full-flow spin-on filter before reaching the crankshaft bearings, connecting rods, camshafts, turbocharger bearings, and valvetrain components.
The turbocharger requires strong and consistent oil supply due to extreme turbine temperatures, making oil quality critical. Mitsubishi recommends synthetic oil meeting API SN or higher with viscosity such as 5W-30 or 10W-40 depending on climate. Oil pressure typically ranges between 350 and 450 kPa (51 to 65 psi) at cruising rpm.
Many versions also include air-to-oil coolers or coolant-to-oil heat exchangers to maintain stable lubrication temperatures. The PCV system prevents crankcase pressurization and recycles blow-by gases for emissions control.
| Cooling System |
The cooling system consists of a belt-driven water pump, aluminum radiator, thermostat, intercooler, and electric cooling fans. Coolant flows through the block, head, and turbocharger center housing to manage temperature. Turbocharger cooling passages help reduce oil coking during shutdown. The thermostat begins opening around 82-C (180-F) and reaches full opening around 95-C (203-F). Cooling-system pressure typically ranges from 12 to 15 psi.
Total coolant capacity averages 6.5 to 7.0 liters (6.9 to 7.4 US quarts). A 50/50 mixture of ethylene glycol and distilled water is recommended. Intercoolers-either top-mounted or front-mounted depending on model-reduce charge-air temperature to improve detonation resistance and increase air density. Proper cooling is crucial for reliable turbocharged operation, especially under continuous high-load conditions.
| Intake and Exhaust Systems |
The induction system includes a high-flow air intake, compressor housing, intercooler piping, and an aluminum intake manifold. Air enters the turbocharger, where it is compressed before passing through the intercooler. Lower intake-air temperature increases oxygen density and reduces knock tendency.
Turbocharger specifications vary widely across versions: early 4G63T engines often used Mitsubishi TD05H-14B or 16G turbochargers, while Lancer Evolution models use more advanced TD05HR variants. Boost is controlled by a wastegate operated by vacuum or electronic solenoids controlled by the ECU.
The exhaust manifold is a high-temperature cast-steel or stainless-steel unit feeding the turbocharger-s turbine housing. Exhaust gases pass through catalytic converters and muffler systems designed to reduce backpressure while meeting emissions standards. The turbo system contributes substantially to the 4G63T-s broad torque curve and strong acceleration characteristics.0
| Ignition and Electrical System |
Ignition is handled by a distributor-less system in later versions, with coil packs firing cylinders in paired or individual configurations. Earlier models utilized distributor-based ignition. The ECU controls ignition timing based on knock sensor feedback, intake-air temperature, engine load, and rpm. Spark plugs are platinum or iridium with heat ranges suitable for turbocharged applications, gapped around 0.7 to 0.8 mm (0.028 to 0.031 inches).
The alternator provides 80 to 100 amperes depending on vehicle model. A high-capacity reduction-gear starter ensures strong cranking performance. Wiring is protected with heat-resistant insulation due to elevated temperatures in the turbocharged engine bay. OBD-compliant diagnostics allow monitoring of ignition and fueling systems.
| Other Systems |
The 4G63T incorporates systems such as PCV emissions control, EVAP vapor management, boost-control solenoids, and intercooler bypass valves. Turbocharged models often include oil coolers, upgraded radiators, and reinforced engine mounts. Accessory drives power the alternator, power-steering pump, air-conditioning compressor, and other components depending on the vehicle.
In various performance applications, the engine also interfaces with advanced AWD systems, making precise ECU communication vital. Sensors-including knock, airflow, cam-angle, crank-angle, manifold-pressure, intake-air-temperature, oxygen, and coolant-temperature sensors-enable refined monitoring and control of all engine functions.
| Dimensions and Weight |
External dimensions include an approximate length of 650 mm (25.6 inches), width of 600 mm (23.6 inches), and height of about 700 mm (27.6 inches). Dry weight ranges from 145 to 165 kg (319 to 364 lbs) depending on turbocharger system, accessories, and generation. Although heavier than modern all-aluminum engines, the 4G63T-s cast-iron block contributes significantly to its unparalleled durability and performance capability.
| Maintenance Data |
Recommended oil-change intervals generally fall between 5,000 and 7,500 km (3,000 to 4,600 miles) depending on usage severity. Spark plugs typically need replacement every 40,000 to 60,000 km (25,000 to 37,000 miles). Air-filter replacement is recommended every 20,000 km (12,000 miles). Coolant should be replaced every 60,000 km (37,000 miles) or every five years.
Timing-belt service intervals are 90,000 to 100,000 km (56,000 to 62,000 miles). Turbocharger inspection-including shaft-play checks and oil-seal verification-should occur periodically. Fuel-injector cleaning and intercooler maintenance are recommended for engines operated under high-performance conditions.
| Tightening Torques |
Torque specifications include: cylinder-head bolts torqued in stages beginning at approximately 30 Nm (22 lb-ft) followed by angle tightening; main-bearing-cap bolts torqued to around 65 to 75 Nm (48 to 55 lb-ft); connecting-rod bolts tightened to approximately 40 Nm (30 lb-ft) plus angle; spark plugs tightened to roughly 18 Nm (13 lb-ft); oil-drain plug torqued to about 35 Nm (26 lb-ft); intake-manifold bolts tightened to 22 to 25 Nm (16 to 18 lb-ft); exhaust-manifold bolts tightened to around 25 to 30 Nm (18 to 22 lb-ft); and turbocharger-mounting bolts torqued to 40 to 50 Nm (30 to 37 lb-ft).
| Vehicle Applications |
The Mitsubishi 4G63T engine was used in a broad range of Mitsubishi performance models including the Galant VR-4, Eclipse GS-T and GSX, Eagle Talon TSi, Plymouth Laser Turbo, and the entire Lancer Evolution series from Evo I through Evo IX.
It also appeared in certain specialized regional models and motorsport vehicles. Its exceptional strength, tuning friendly design, and proven motorsport record made it a defining engine in the history of turbocharged performance vehicles worldwide.
____________________________________________________________________________________
| Car Engines Technical Specifications |
| Small Engines Technical Specifications |
| Industrial Engines Technical Specifications |
| Outboard Engines Technical Specifications |