ENGINE - 4.0 V8

ENGINE TUNING DATA

3

INFORMATION

ENGINE 4.0 V8

Type

4.0 Litre V8

.................................................................................

Firing order

1-8-4-3-6-5-7-2

.....................................................................

Cylinder Numbers
Left bank

1-3-5-7

..........................................................................

Right bank

2-4-6-8

........................................................................

No 1 Cylinder location

Pulley end of left bank

...................................................

Spark plugs
Make/type

Champion RN11YCC

........................................................................

Gap

0.90 - 1.00 mm

..................................................................................

0.035 - 0.040 in

Coils
Make

Lucas 2D1S2

................................................................................

Type

Twin coils, bank of 4

.................................................................................

High Compression

Low Compression

Compression ratio

9.35:1

............................................................

8.2:1

Fuel injection system

Sagem - Lucas GEMS8 Hot-wire air flow sensor

.....................................................

system electronically controlled

Valve Timing

Inlet

Exhaust

Opens

28

°

BTDC

..............................................................................

66

°

BBDC

Closes

77

°

ABDC

..............................................................................

39

°

ATDC

Duration

285

°

...........................................................................

285

°

Valve peak

108

°

ATDC

.......................................................................

110

°

BTDC

Idle speed - controlled by GEMS system

all loads off

700

±

20 rev/min

..............................................................

Base idle speed

Not adjustable

..............................................................

Idle air control valve position, checked via TestBook

CO at idle

vehicles without heated oxygen sensors

1.5% æ 0.5%

.................

Fuel
9.35:1 catalyst

95 RON minimum unleaded

.................................................................

USA vehicles - Premium unleaded (PUG)

95 RON minimum

.......................

8.2:1

catalyst

91 RON minimum unleaded

.................................................................

Non catalyst

91 RON minimum unleaded or leaded

.........................................................