What is the 4G63T's stock power?

Power varies by generation: Evo I–III produced 244 PS JDM; Evo IV through IX were subject to the 280 PS JDM ceiling. Eclipse GST was rated 195 hp US-spec.

Does the 4G63T have factory forged internals?

The Lancer Evolution variants of the 4G63T used forged connecting rods and a forged crankshaft from the factory, contributing to their higher power headroom versus the Eclipse/Talon version, which used cast internals.

What cars used the 4G63T?

The 4G63T powered the Mitsubishi Lancer Evolution (CE9A through CT9A), the Mitsubishi Eclipse (D32A), the Eagle Talon, and the Galant VR-4, among others.

How much power can a stock 4G63T block make?

With appropriate support modifications (fuel, cooling, ECU), 380–400 whp is a reasonable ceiling for the stock bottom end on Evo-spec forged internals. Eclipse-spec cast internals are more conservatively rated at 300–330 whp stock-block.

Mitsubishi · Inline-4 · Turbocharged (TD05H-16G on Evolution IX; varies by generation)

4G63T

The 4G63T is a 2.0-litre DOHC turbocharged inline-four produced by Mitsubishi from 1987, used across the Lancer Evolution series (CE9A through CT9A) and the Eclipse/Eagle Talon. It is one of the more extensively documented rally engines in production car history, having powered Mitsubishi's World Rally Championship efforts from 1996 to 1999 and the Lancer Evolution's decade of Group A and N competition. The engine's iron block and forged internals from the factory contribute to its reputation for absorbing high power levels with appropriate supporting modifications.

Engine specifications

Displacement	2.0L (1,997cc)
Configuration	Inline-4
Aspiration	Turbocharged (TD05H-16G on Evolution IX; varies by generation)
Valvetrain	DOHC 16-valve (MIVEC on Evolution IX)
Fuel system	Sequential multi-point injection
Power (JDM)	280 PS (206 kW) @ 6,500 rpm (Evolution IX JDM, self-imposed limit)
Torque (JDM)	422 N·m (311 lb-ft) @ 3,500 rpm (Evolution IX)
Redline	7,500 rpm
Notes	Like the 2JZ-GTE and RB26DETT, the 4G63T was subject to the informal 280 PS JDM ceiling. Actual output typically measured higher on independent dynos.

Variants

4G63T Evo I–III (CE9A/CD9A): TD05H-14B turbo, 244 PS JDM. Iron block, no MIVEC.
4G63T Evo IV–VI (CN9A/CP9A): TD05H-16G or -17C. 280 PS ceiling from Evo IV.
4G63T Evo VII–VIII (CT9A): TD05H-16G with revised intake/exhaust; Evo VIII added Bilstein suspension and improved intercooler.
4G63T Evo IX (CT9A final): MIVEC (Mitsubishi Innovative Valve timing Electronic Control) on intake cam added; 280 PS maintained.

Vehicles using the 4G63T

Mitsubishi Lancer Evolution I (CE9A)
Mitsubishi Lancer Evolution II–III (CD9A)
Mitsubishi Lancer Evolution IV–VI (CN9A/CP9A)
Mitsubishi Lancer Evolution VII–IX (CT9A)
Mitsubishi Eclipse 2G (D32A)

Common issues

Head gasket failure at high boost

Cause: OEM head gasket inadequate above ~380 whp; detonation accelerates failure.

Remedy: HKS or Cometic MLS head gasket with ARP head studs on any high-boost build.

AYC/ACD differential pump failure (Evo VII–IX)

Cause: Active yaw control hydraulic pump wears; contaminated fluid accelerates degradation.

Remedy: Drain and refill AYC fluid every 30,000 km; rebuild or replace pump at failure.

Intake manifold cracking

Cause: Plastic upper intake manifold fatigues from heat cycling.

Remedy: Replace with aftermarket aluminum intake manifold (Skunk2, Greddy).

Oil starvation on track

Cause: Oil surge in corners with OEM sump; factory baffle adequate for street use only.

Remedy: Install oil accumulator or dry sump system for sustained track use.

Tuning ceiling

~400 whp on stock bottom end with appropriate fuel and cooling support. Factory forged internals (connecting rods, forged crank) on Evo models provide a stronger baseline than the Eclipse 4G63T.

Stage 1 (ECU + exhaust) 300–330 whp

ECU tune (EcuFlash or Cobb), 3" exhaust, cold-air intake, boost raise to 1.3 bar.

Stage 2 (turbo upgrade) 370–420 whp

Evo 9 turbo swap or Forced Performance Hybrid, larger injectors (850cc), Walbro 255, fuel rail upgrade.

Stage 3 (built engine) 450–600 whp

Eagle or Manley rods, forged pistons, Precision or Borg Warner turbo, E85 fuel, standalone ECU.

Common modifications

ECU tune (EcuFlash or Cobb AccessPort for Evolution)
Exhaust 3" from manifold
Front-mount intercooler upgrade
Fuel pump and injector upgrade
Evoscan data-logging (essential for safe tuning)
Lancer Evo turbo upgrade (Evo IX TD05H-20G or FP Hybrid)
Limited-slip differential maintenance (AYC fluid on later Evos)

Frequently asked questions

What is the 4G63T's stock power?: Power varies by generation: Evo I–III produced 244 PS JDM; Evo IV through IX were subject to the 280 PS JDM ceiling. Eclipse GST was rated 195 hp US-spec.
Does the 4G63T have factory forged internals?: The Lancer Evolution variants of the 4G63T used forged connecting rods and a forged crankshaft from the factory, contributing to their higher power headroom versus the Eclipse/Talon version, which used cast internals.
What cars used the 4G63T?: The 4G63T powered the Mitsubishi Lancer Evolution (CE9A through CT9A), the Mitsubishi Eclipse (D32A), the Eagle Talon, and the Galant VR-4, among others.
How much power can a stock 4G63T block make?: With appropriate support modifications (fuel, cooling, ECU), 380–400 whp is a reasonable ceiling for the stock bottom end on Evo-spec forged internals. Eclipse-spec cast internals are more conservatively rated at 300–330 whp stock-block.

Sources

Mitsubishi 4G63 Engine Service Manual
FIA Group A homologation sheet — Lancer Evolution III (1995)
Mitsubishi Motors press releases, Lancer Evolution IX (2005)

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