Range Rover P38
ENGINE TUNING DATA
1
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 and type
Up to 99MY
Champion RN11YCC
.............................................................
From 99MY
Champion RC11PYB4
.............................................................
Gap
Up to 99MY
0.90 - 1.00 mm
.............................................................
0.035 - 0.040 in
From 99MY
1.00
±
0.05 mm
.............................................................
0.040
±
0.002 in
NOTE: Do not attempt to adjust the gaps of RC11PYB4 spark plugs.
Valve timing
Inlet
Exhaust
Opens
28
°
BTDC
..............................................................................
66
°
BBDC
Closes
77
°
ABDC
..............................................................................
39
°
ATDC
Idle speed - controlled by Engine Management System
Up to 99MY
700
±
20 rev/min
......................................................................
From 99MY
660 rev/min
......................................................................
Base idle setting
Not adjustable (idle air control valve position checked
.............................................................
via TestBook)
CO at idle (vehicles without heated oxygen sensors)
Up to 99MY
1.0 - 2.0 %
......................................................................
From 99MY
0.5 - 1.0 %
......................................................................
Calculated Load Value (CLV) - Engine fully warm, in neutral gear, with all loads off
At Idle
2.8 to 3.8%
...............................................................................
At 2500 rev/min
10%
±
1%
................................................................
Air mass flow at sea level - Engine fully warm, in neutral gear, with all loads off
At Idle
20
±
3 kg/hr
...............................................................................
At 2500 rev/min
60
±
3 kg/hr
................................................................
