Mitsubishi Lancer Evolution 8 MR. Manual - part 4

ENGINE (4G6) – GENERAL, BASE ENGINE (6 M/T)

1-9

★

1. O2 sensor

★

2. Air flow sensor

★

3. Air intake sensor

★

4. Throttle position

sensor

★

5. Cam position sensor

★

6. Crack angle sensor

★

7. Atmospheric pressure

sensor

★

8. Water temperature

sensor

★

9. Knock sensor

• Power supply
•  Ignition switch IG
• Ignition switch ST
• Vehicle speed sensor
• A/C switch
• A/C load signal
• Power steering fluid

pressure switch

• Alternator FR signal
• Intercooler water spray

switch (auto)

• Intercooler water spray

switch (manual)

✩

1. Injector

✩

2. ISC servo (stepper

motor)

✩

3. Fuel pressure  control

solenoid valve

✩

4. No.1 wastegate solenoid

valve

✩

5. No.2 wastegate solenoid

valve

✩

6. Purge control solenoid

valve

✩

7. Secondary air control

solenoid valve

• Engine control relay
• Fuel pump relay 2, 3
• A/C relay
• Ignition coil
• Fan controller
• Condenser fan relay (HI)
• Condenser fan relay

(LOW)

• Engine warning lamp
• Diagnosis output
• Alternator G terminal
• Intercooler water spray

relay

• Intercooler water spray

lamp

Engine ECU

✩

6. Purge control

solenoid valve

Canister

✩

7. Secondary air

control solenoid valve

From fuel tank

Secondary
air valve

By-pass
valve

★

1. O

2

sensor

✩

3. Fuel pressure

control solenoid valve

★

4. Throttle

position

sensor

★

7. Atmospheric pressure

sensor

★

3. Air intake 

sensor

★

2. Air flow sensor

✩

4. No.1

wastegate

solenoid valve

✩

5. No.2 wastegate

solenoid valve

Only operates on 6M/T

Wastegate actuator

Fuel pressure
regulator

✩

1.  Injector

★

5.Cam position sensor

★

8.Water temperature sensor

★

9.Knock sensor

Crack angle sensor

Catalytic converter

Air

intake

Check

valve

✩

2. ISC servo

Vacuum
tank

From fuel
pump

To fuel
tank

Control system diagram

ENGINE (4G6) – CONTROL SYSTEM (6 M/T)

1-10

1. Supercharging pressure control

The maximum torque has been increased, compared to the 4G63-DOHC-T/C engine in the current Lancer Evolution VIII, by
installing an additional wastegate solenoid valve (increased from 1 to 2 valves).

By adding a parallel No.2 wastegate solenoid valve to the previous system, provides extra relief capacity for the pressure
applied to the wastegate actuator thus increasing the range of supercharging pressure.. 
The engine ECU raises the supercharging pressure even further, thus raising the maximum torque, by driving the No.2
wastegate solenoid valve when the engine approaches maximum torque. 
The No.1 wastegate solenoid valve is essentially controlled in the same way as previously.

Air flow
sensor

Knock
sensor

Engine
ECU

Battery

Secondary air
control solenoid
valve

Secondary
air valve

Ignition
switch

Air
intake

Bypass valve

Vacuum tank

Intercooler

Turbocharger

Wastegate 

actu-
ator

No. 1
wastegate
solenoid
valve

No. 2 wastegate
solenoid valve

Crank angle
sensor

2-1

Power Train – Differential

SECTION 2

POWER TRAIN

CONTENTS

Differential ..............................................2-1

Differential

The following changes have been made to the Super AYC differential.
•

Reduced weight: The weight of the differential has been reduced by building the clutch case from aluminium, rather than
steel, and partially revising the thickness of the clutch discs.

•

Improved strength and durability: Strength and durability have been raised by adopting special high-strength steel for the
hypoid gears (pinion gear and drive gear), instead of the cast steel used previously.

•

Improved control when ABS is operating: Revisions to the communications with the ABS-ECU and the control procedure
during ABS operation, as well as active ACD/AYC control in high friction road surfaces, such as circuits, have led to
increased steerability and stability.

Structural Diagram

Hypoid gears

Clutch case

Clutch discs

3-1

DRIVE CONTROL – Front suspension, Rear suspension, Wheels, Tyres

SECTION 3

DRIVE CONTROL

CONTENTS

Front suspension....................................3-1
Rear suspension.....................................3-1

Wheels and Tyres ...................................3-1

Front suspension

Road-holding has been improved by the adoption of Bilstein shock absorbers. 
(GRS: Standard; RS: Optional)

Notes :
* Bilstein are one of the world’s leading manufacturers of shock absorbers, and their products are used in racing vehicles
worldwide. 

Rear suspension

•

Road-holding has been improved by the adoption of Bilstein shock absorbers. 
(GRS: Standard; RS: Optional)

•

The specifications of the coil springs have been changed. (GSR)

Specifications

Item

Lancer Evolution VIII MR GSR

Lancer Evolution VIII GSR

Wire diameter mm

12

←

Average diameter mm

88

←

Free length mm

277

287

Wheels and Tyres

BBS lightweight forged alloy wheels are provided as an option,
which reduces the unsprung weight.  Fitting these BBS lightweight
wheels allows the Bilstein shock absorbers to display their full
range of performance. 

Note: 
See “Section 8 Main Equipment” for detailed specifications.