Mitsubishi Lancer Evolution 8 MR. Manual — part 3
ENGINE (4G6) – BASE ENGINE (6 M/T)
1-5
6. Camshaft
Output at high engine speeds has been improved by altering the cam profile of the intake camshaft, and optimizing the valve
timing.
Evolution VIII MR
Evolution VIII
Cam height mm
35.96
35.79
Evolution VIII MR
Evolution VIII
T.D.C (top dead centre)
T.D.C (top dead centre)
Intake valve open
Intake valve
closed
Exhaust
valve closed
Exhaust
valve open
Intake valve open
Intake valve
closed
Exhaust
valve closed
Exhaust
valve open
B.D.C (Bottom dead centre)
B.D.C (Bottom dead centre)
ENGINE (4G6) – INTAKE / EXHAUST SYSTEM (6 M/T)
1-6
Intake / Exhaust System (6 M/T)
1. Exhaust system
1-1 Turbocharger
A large-nozzle 10.5T turbo has been adopted in order to improve mid to high-range torque. Optimum control of the
supercharging pressure has ensured good torque and response at medium engine speeds.
The positions of the turbine housing and the wastegate holes have also been changed to achieve smoother outflow and
increase low-speed torque. Along with these modifications, the wastegate valve has been changed from an oval to a circular
valve.
(Evolution VIII MR)
(Evolution VIII)
Turbine housing
Turbine housing
Wastegate holes
Wastegate holes
Oval valve
Circular valve
ENGINE (4G6) – INTAKE / EXHAUST SYSTEM (6 M/T)
1-7
1-2 Exhaust silencer
A tailpipe with built-in sound-absorbing material has been adopted, in order to increase the silencing effect.
Structural diagram
Main exhaust
silencer
Tailpipe
(with built-in sound-
absorbing material)
Cross-section A–A
Sound-
absorbing
material
ENGINE (4G6) – GENERAL, BASE ENGINE (6 M/T)
1-8
Control system (6M/T)
The following changes have been made, based on the control system in the 4G63-DOHC-T/C engine fitted in the current
Lancer Evolution VIII.
* Addition of wastegate solenoid valve (1 valve –> 2 valves)
System Block Diagram
Air flow sensor (AFS)
Air temperature sensor
Atmospheric pressure sensor
Water temperature sensor
Throttle position sensor (TPS)
A/C switch
A/C load signal
Cam position sensor
Crank angle sensor
Alternator FR terminal
Vehicle speed sensor
Power steering fluid pressure
switch
Knock sensor
Intercooler water spray (auto)
Intercooler water spray (manual)
O
2
sensor
Ignition switch –IG
Ignition switch –ST
Power supply
Engine ECU
Fuel injection control
Idle speed control (ISC)
Ignition timing control
Engine control relay control
Fuel pump relay control
A/C relay control
Fan motor control (radiator)
Fan relay control (A/C
condenser)
Alternator control
Air flow sensor filter reset
control
Fuel pressure control
Supercharging pressure
control
Secondary air control
Intercooler water spay control
Engine warning light control
O
2
sensor heater control
Purge control
Diagnosis output
RAM data transmission
No. 1 indicator
No. 2 indicator
No. 3 indicator
No. 4 indicator
ISC servo (stepper motor)
Ignition coil A (No.1 – No.4)
Ignition coil B (No.2 – No.3)
Engine control relay
Fuel pump relay 2
Fuel pump relay 3
A/C relay
Fan controller (radiator fan)
Fan motor relay (HI, LOW)
(A/C condenser)
Alternator G terminal
Air flow sensor
Fuel pressure control valve
No. 1 wastegate solenoid valve
No. 2 wastegate solenoid valve
Secondary air control solenoid
valve
Intercooler water spray relay
Intercooler water spray lamp
Tachometer
Engine warning lights
O
2
sensor heater
Purge control solenoid valve
Diagnosis output terminal
Diagnosis output terminal (for
MUT-II)
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