Mitsubishi Lancer Evolution 8. Manual — part 2
ENGINE (4G6) – GENERAL
1-1
SECTION 1
CONTENTS
Engine (4G6). . . . . . . . . . . 1-1
General information. . . . . . . . 1-1
1. Major specifications . . . . . . . . . ...1-1
2. Engine Performance Curve . . . . . . ...1-2
Base Engine . . . . . . . . . . . 1-2
1. Timing belt cover. . . . . . . . . . . 1-2
2. Piston . . . . . . . . . . . . . . . .1-3
3. Valve spring . . . . . . . . . . . . ...1-3
4. Delivery pipe . . . . . . . . . . . . ..1-4
Cooling Equipment. . . . . . . . .1-5
Intake and Exhaust Equipment . . . .1-5
1. Air intake system. . . . . . . . . . . 1-5
Fuel System. . . . . . . . . . . .1-7
1. Fuel tank . . . . . . . . . . . . . . 1-8
Control System. . . . . . . . . ...1-9
1. Fuel injection control . . . . . . . . . 1-11
2. Idle speed control. . . . . . . . . . .1-11
3. Ignition timing and distribution
control . . . . . . . . . . . . . . ..1-12
4. Other controls . . . . . . . . . . . ..1-12
5. Diagnosis system. . . . . . . . . . .1-12
Emission Control System . . . . . 1-13
Mount . . . . . . . . . . . . . .1-14
Engine (4G6)
General information
The 4G63-T/C engine of the Lancer Evolution-VIII is basically the same as the 4G63-T/C engine of the Lancer Evolution-VII.
The basic structure is the same, but the following improvements and performance upgrades have been implemented.
• Changes from a three section split mold to a two section split mold
• Changes to piston shape and materials
• Beehive-shaped valve springs
• Changes to delivery pipe materials
1. Major specifications
j
p
Items
Factors
Total displacement cc
1,997
Combustion chamber
Pentroof type
Bore x stroke mm
85.0 x 88.0
Compression ratio
8.8
Camshaft arrangement
DOHC 4-valve
Fuel used
Unleaded premium
Maximum output (kW/rpm)
206/6500
Maximum torque (Nm/rpm)
392/3500
Fuel system
Electronic controlled multipoint fuel injection
Ignition system
Electronic controlled two-coil
Lash adjuster
Equipped
ENGINE (4G6) – GENERAL INFORMATION AND BASE ENGINE
1-2
2. Engine Performance Curve
Base Engine
1. Timing belt cover
The timing belt cover has changed from a three section split mold to a two section split mold.
The materials have been changed from aluminium to resin.
Shaft torque (N-m)
Shaft output (kW)
New
Old
6EN2239
Engine r.p.m.
AC211451AB
ENGINE (4G6) – BASE ENGINE
1-3
New
Old
Retainer
Valve spring
3. Valve spring
Beehive-shaped valve springs already introduced in Japan, have been adopted.
The diameter of the retainer has been reduced and its material has been changed from chrome to abrasion resistant alloy.
2. Piston
The skirt has been reinforced in order to reduce friction.
A high temperature fatigue resistant alloy has been adopted in order to improve reliability.
New
Old
6EN2240
6EN2242
ENGINE (4G6) –ENGINE AND COOLING EQUIPMENT
1-4
4. Delivery pipe
The material of the delivery pipe has changed from alloy to steel plate to reduce vibration noise.
New
Old
Cooling System
The cooling system has changed as follows.
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