1 1ENGINE (4G6) – GENERAL
SECTION 1
ENGINE (4G6)
CONTENTS
General ....................................................1 1
1. Major Specifications ....................................1 1
2. Engine Performance Curve.........................1 2
Base Engine (6 M/T) ...............................1 2
1. Cylinder head gasket...................................1 2
2. Pistons ..........................................................1 3
3. Piston rings (2nd) ........................................1 34. Oil rings ........................................................1 4
5. Counterbalance shaft .................................1 4
6. Camshaft.......................................................1 5
Intake / Exhaust System (6 M/T)............1 6
1. Exhaust system ...........................................1 6
Control system (6 M/T) ...........................1 8
1. Supercharging pressure control ..............1 10
General
The 4G63 T/C engine fitted in the Lancer Evolution VIII MR is basically the same as the 4G63 T/C engine used in the Lancer
Evolution VIII.
The basic structure is the same in both the 6M/T (6 speed) and 5M/T (5 speed) versions, but the following improvements have
been made to the 6M/T version, in order to achieve higher performance.
• Adoption of 5 ply cylinder head gasket
• Addition of V shaped groove in piston , and modified shape in cooling channel
• Reduced oil consumption by increasing tension in piston rings and reducing end to end gap
•Extra durability and reduced oil consumption by using new treatment on outer surface of oil ring side rail, and altering
thickness
•Lighter counterbalance shaft
• Increased output at high engine speeds by modifying intake cams
Major Specifications
Item 6 M/T5M/T
Total Displacement cc1997
Combustion chamberPentroof type
Bore x stroke (mm)85.0 x 88.0
Compression ratio8.8
Camshaft arrangementDOHC 4 valve
FuelPremium unleaded
Max. output (kW/rpm)206/6500
Max. torque (Nm/rpm)400/3500392/3500
Fuel systemElectronic controlled multipoint fuel injection
Ignition systemElectronic controlled two coil
Lash adjusterEquipped
REFERENCE MATERIAL – DETAILED SPECIFICATIONS8 5
GH CT9AItem
SNDFZSJDFZSJGFZ
1st2.7852.909¨
2nd1.9501.944¨
3rd1.4441.434¨
4th1.0961.100¨
5th0.8250.868¨
6th 0.693¨
TransmissionGear ratio
Reverse3.4162.707¨
Front4.5294.583¨DifferentialReduction
ratio
Rear3.307¨¨
Power train
TransferReduction
ratio0.302¨¨
Main brake typeHydraulic:
Front : Disc
Rear : Disc¨¨
Parking brake typeMechanical
wheel brake¨¨
FrontMacPherson¨¨
Braking
system
Suspension
RearMulti link¨¨
CO when
unloaded : %,
HC : ppmCO: 0.1,
HC: 100¨¨
10/15 mode
g/kmCO: 0.67,
HC: 0.08,NOx: 0.08¨¨
Emission
gas
suppressionequipmentQuantity or concentration
of exhaust gas
11 mode g/testCO: 19.0,
HC: 2.20,
NOx: 1.40¨¨
