CALIBRA TURBO Manual C20LET 4x4 ECU, Opel
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GENERAL INFORMATION
OA-1
SECTION 0A
CAUTION:
This vehicle Is equipped with an AIR BAG. Refer to CAUTIONS, Section 12, In this Volume of the Preliminary Service Information
before performing any service operation on or around Air Bag components, the steering mechanism or wiring.
Failure to follow the CAUTIONS could result in air bag deployment, resulting In possible personal Injury or unnecessary SRS system
repairs.
GENERAL INFORMATION
CONTENTS
Ref. Subject
Page
1.
GENERAL INFORMATION
OA-1
1.1
PRINCIPLE FEATURES OF THE
CALIBRA TURBO 4X4
OA-1
Seats and Associated Items
OA-1
Instruments .
OA-1
Air Bag
OA-2
Road heels
OA-2
Brakes
OA-2
DOHC Turbo Engine
OA-3
Clutch/Flywheel
OA-4
Manual Transmission
OA-5
Transfer Box
OA-6
Propeller Shaft
OA-7
Exhaust System
OA-7
1. GENERAL INFORMATION
The introduction of the four wheel drive Calibra Turbo is the first Holden production vehicle that is equipped with four wheel drive at the factory. This
vehicle has a substantial number of changed vehicle specifications when compared to the two wheel drive models. The following provides a summary of
these features, while subsequent Sections in this Volume detail more specific information relevant to the engine management system of the new C 20
LET turbocharged engine, and the permanent, four wheel drive system.
1.1 PRINCIPLE FEATURES OF THE CALIBRA 4X4
Seats and Associated Items
Calibra 4x4 is fitted with leather trim on the seat covers,
door panelling and the rear quarter panelling, as standard
fitment. The seats are electrically heated and
thermostatically controlled.
Instruments
While the arrangement of the instruments
is the same as previous Calibra models,
speedometer operation is now electronic,
providing greater accuracy. The scale up to
60 km/h is now spread, providing better
driver legibility in the lower speed range
and the Calibra Turbo speedometer is now
calibrated to a top speed of 260 km/h.
OA-2
GENERAL INFORMATION
A four wheel drive telltale lamp for the four wheel drive
system in the Calibra Turbo, is now included ('1' in Figure
OA-2), that is illuminated continuously or flashes when a
system fault has been detected and the normally permanent
four wheel drive mode is disengaged. Refer to Section 4 in
this Volume for more detailed information.
Air Bag
All Calibra models are now fitted with a driver’s air bag
as standard equipment.
Should a fault develop in the air bag s stem, an air bag
warning lamp in the instrument pane ('2' in Figure OA-2),
will be illuminated.
Road Wheels
Together with revised design wheel hubs, the Calibra 4x4 is
fined with 5 hole, 6J x 16, light alloy disc wheels with a rim
offset of 49 mm. These wheels are fitted with 205/50 ZR 16
tyres as standard. Note that snow chains are not to be fitted
to these tyre and wheel assemblies. Rear wheel hubs are
also drilled to accommodate the new road wheels.
Brakes
The front brakes on the Calibra Turbo, feature a revised
design, single piston, front brake caliper with a piston
diameter of 54 mm, with ventilated discs of 284 mm
diameter.
The rear brakes retain the fixed caliper, two 33 mm piston
design, fitted to solid discs of 270 mm.
The brake master cylinder has an increased bore size that
changes from 22.2 mm to 23.8 mm to correspond to the
increased diameter calipers fitted to the front brakes.
GENERAL INFORMATION
OA-3
DOHC Turbo Engine
The new 2 litre, 16 valve C 20 LET engine features a new integral turbocharger system with intake charge cooling and sequential fuel infection and
knock control and is based on the existing C 20 XE engine. The engine management system used, is the Motronic 2.7, that is also used to control
the intake charge pressure. For a more detailed explanation of the engine management system, refer to Section 6C in this Volume.
Engine Data - C 20 LET
Displacement . ................................................................................................................................................................ 1,998 cm
Bore diameter . ............................................................................................................................................................... 86.0 mm
Stroke ............................................................................................................................................................................. 86.0 mm
Valve Diameter
- Inlet . ............................................................................................................................................................................. 33.0 mm
- Exhaust......................................................................................................................................................................... 29.0 mm
Valve Stroke . ................................................................................................................................................................. 8.5 mm
Output at Engine Speed . ............................................................................................................................................... 150 kW @ 5,600 rpm
Maximum Torque at Engine Speed . .............................................................................................................................. 280 Nm @ 2,400 rpm
Compression ratio .......................................................................................................................................................... 9.0 : 1
Spark Plugs . .................................................................................................................................................................. FR 7 LC 2
Engine Management with Knock Control and Charge Pressure Control ....................................................................... Motronic M 2.7
Fuel . ............................................................................................................................................................................... Unleaded 91 octane
OA-4
GENERAL INFORMATION
Power and Torque Curves
Clutch/Flywheel
The clutch has been adapted to suit the increase in engine torque.
This has been achieved by increasing the driven plate surface area
and increasing the force applied by the Belleville spring in the
pressure plate.
As a general design change, the flywheel used on all Calibra
engines is now of the 'pot' design. This change results in a
higher mass moment of inertia that contributes to smoother
running and a reduction in transmission gear rollover rattle.
This now means that the clutch can be replaced only
when the transmission has been removed.
GENERAL INFORMATION
OA-5
Manual Transmission
The Calibre Turbo is fitted with a newly developed, compact, fully synchronized, 6-speed manual transmission. Known as the F
28/6, the extra sixth gear, results in low engine speed at high road speeds, providing high engine torque and low fuel consumption.
Essentially, there are no serviceable components within the transmission.
Gear Selected
Ratio :1
1
3.57
2
2.13
3
1.46
4
1.10
Gear Ratios
5
0.89
6
0.74
Reverse
3.32
Front Output Drive Axle
3.72
Rear Output Drive Axle
3.70
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GENERAL INFORMATION
OA-1
SECTION 0A
CAUTION:
This vehicle Is equipped with an AIR BAG. Refer to CAUTIONS, Section 12, In this Volume of the Preliminary Service Information
before performing any service operation on or around Air Bag components, the steering mechanism or wiring.
Failure to follow the CAUTIONS could result in air bag deployment, resulting In possible personal Injury or unnecessary SRS system
repairs.
GENERAL INFORMATION
CONTENTS
Ref. Subject
Page
1.
GENERAL INFORMATION
OA-1
1.1
PRINCIPLE FEATURES OF THE
CALIBRA TURBO 4X4
OA-1
Seats and Associated Items
OA-1
Instruments .
OA-1
Air Bag
OA-2
Road heels
OA-2
Brakes
OA-2
DOHC Turbo Engine
OA-3
Clutch/Flywheel
OA-4
Manual Transmission
OA-5
Transfer Box
OA-6
Propeller Shaft
OA-7
Exhaust System
OA-7
1. GENERAL INFORMATION
The introduction of the four wheel drive Calibra Turbo is the first Holden production vehicle that is equipped with four wheel drive at the factory. This
vehicle has a substantial number of changed vehicle specifications when compared to the two wheel drive models. The following provides a summary of
these features, while subsequent Sections in this Volume detail more specific information relevant to the engine management system of the new C 20
LET turbocharged engine, and the permanent, four wheel drive system.
1.1 PRINCIPLE FEATURES OF THE CALIBRA 4X4
Seats and Associated Items
Calibra 4x4 is fitted with leather trim on the seat covers,
door panelling and the rear quarter panelling, as standard
fitment. The seats are electrically heated and
thermostatically controlled.
Instruments
While the arrangement of the instruments
is the same as previous Calibra models,
speedometer operation is now electronic,
providing greater accuracy. The scale up to
60 km/h is now spread, providing better
driver legibility in the lower speed range
and the Calibra Turbo speedometer is now
calibrated to a top speed of 260 km/h.
OA-2
GENERAL INFORMATION
A four wheel drive telltale lamp for the four wheel drive
system in the Calibra Turbo, is now included ('1' in Figure
OA-2), that is illuminated continuously or flashes when a
system fault has been detected and the normally permanent
four wheel drive mode is disengaged. Refer to Section 4 in
this Volume for more detailed information.
Air Bag
All Calibra models are now fitted with a driver’s air bag
as standard equipment.
Should a fault develop in the air bag s stem, an air bag
warning lamp in the instrument pane ('2' in Figure OA-2),
will be illuminated.
Road Wheels
Together with revised design wheel hubs, the Calibra 4x4 is
fined with 5 hole, 6J x 16, light alloy disc wheels with a rim
offset of 49 mm. These wheels are fitted with 205/50 ZR 16
tyres as standard. Note that snow chains are not to be fitted
to these tyre and wheel assemblies. Rear wheel hubs are
also drilled to accommodate the new road wheels.
Brakes
The front brakes on the Calibra Turbo, feature a revised
design, single piston, front brake caliper with a piston
diameter of 54 mm, with ventilated discs of 284 mm
diameter.
The rear brakes retain the fixed caliper, two 33 mm piston
design, fitted to solid discs of 270 mm.
The brake master cylinder has an increased bore size that
changes from 22.2 mm to 23.8 mm to correspond to the
increased diameter calipers fitted to the front brakes.
GENERAL INFORMATION
OA-3
DOHC Turbo Engine
The new 2 litre, 16 valve C 20 LET engine features a new integral turbocharger system with intake charge cooling and sequential fuel infection and
knock control and is based on the existing C 20 XE engine. The engine management system used, is the Motronic 2.7, that is also used to control
the intake charge pressure. For a more detailed explanation of the engine management system, refer to Section 6C in this Volume.
Engine Data - C 20 LET
Displacement . ................................................................................................................................................................ 1,998 cm
Bore diameter . ............................................................................................................................................................... 86.0 mm
Stroke ............................................................................................................................................................................. 86.0 mm
Valve Diameter
- Inlet . ............................................................................................................................................................................. 33.0 mm
- Exhaust......................................................................................................................................................................... 29.0 mm
Valve Stroke . ................................................................................................................................................................. 8.5 mm
Output at Engine Speed . ............................................................................................................................................... 150 kW @ 5,600 rpm
Maximum Torque at Engine Speed . .............................................................................................................................. 280 Nm @ 2,400 rpm
Compression ratio .......................................................................................................................................................... 9.0 : 1
Spark Plugs . .................................................................................................................................................................. FR 7 LC 2
Engine Management with Knock Control and Charge Pressure Control ....................................................................... Motronic M 2.7
Fuel . ............................................................................................................................................................................... Unleaded 91 octane
OA-4
GENERAL INFORMATION
Power and Torque Curves
Clutch/Flywheel
The clutch has been adapted to suit the increase in engine torque.
This has been achieved by increasing the driven plate surface area
and increasing the force applied by the Belleville spring in the
pressure plate.
As a general design change, the flywheel used on all Calibra
engines is now of the 'pot' design. This change results in a
higher mass moment of inertia that contributes to smoother
running and a reduction in transmission gear rollover rattle.
This now means that the clutch can be replaced only
when the transmission has been removed.
GENERAL INFORMATION
OA-5
Manual Transmission
The Calibre Turbo is fitted with a newly developed, compact, fully synchronized, 6-speed manual transmission. Known as the F
28/6, the extra sixth gear, results in low engine speed at high road speeds, providing high engine torque and low fuel consumption.
Essentially, there are no serviceable components within the transmission.
Gear Selected
Ratio :1
1
3.57
2
2.13
3
1.46
4
1.10
Gear Ratios
5
0.89
6
0.74
Reverse
3.32
Front Output Drive Axle
3.72
Rear Output Drive Axle
3.70
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