MG MGB User Manual

ENGINE TUNING
DATA
Year:
1976
on
To
European
emission
control
requirements
(ECE
15)
ENGINE
Type
Capacity
Compression
ratio
Firing
order
Compression
préssure
Idling
speed
Fast
idle speed
Ignition
timing:
Stroboscopic
Advance check
Timing
marks
.. ..
.. ..
..
Valve
clearance:
Inlet
and
exhaust
(cold)
SPARK
PLUGS
Make/
typ
Gap
..
IGNITION COIL
Make/type
.. ..
..
Primary
resistance
at
20°C
(68°F)
Consumption
..
.
DISTRIBUTOR
Make/
type
Rotation
of
rotor
Dwell angle
..
Contact breaker
gap
..
Condenser
capacity
..
Serial No.
Centrifugal
advance
Decelerating check*T
Vacuum
advance
Starts
Maximum
.. .. ..
Total
crankshaft
degrees
CARBURETTERS
Make/
type
Speci■cation
.
Jet
size
..
Needle
Piston sparing
..
EXHAUST
EMISSION
Exhaust
gas
analyser
reading
at
engine
idle speed
*
Crankshaft degrees
and
rev/min
MGB. Issue
1.
91427
18V 847F
109.8
1113
1798
cm3
9.0:
1
1,
3, 4, 2
170
to
1951bf/1nz
11.9
to
13.7
kgf/cm’
750
rev/
min
1300
rev/min
10O
B.T.D.C.
at
1,000
rev/min
190
to
23°
at
3,400
rev/min
Pointer
on
timing
case,
notch
0n
crankshaft
pulley
0.013
in
0.33
mm
Champion
RN—9Y
0.035
in
0.90
mm
Lucas
HA 12
3.1
to
3.5
Ohms
3.9A
Lucas 45D4
Anti-clockwise
51°
i
5°
0.014
to
0.016
in
0.35
to
0.40
mm
0.18
to
0.24
microfarad
41610
20°
to
24°
at
5,400
rev/min
15°
to
19°
at
4,400
rev/min
10°
to
140
at
3,400
rev/min
1°
to
5°
at
1,600
rev/min
(3—11—12)
3
ian
76
mmHg
11
ian
558 mmHg
24°
i
2°
Twin
SU/HIF4
FZX 1229
0.090
in
2.2
mm
ACD
Red
3.0%
CO
T Vacuum
pipe disconnected.
Engine
Tuning Data
9

MG MGB Specifications

General

Brand	MG
Model	MGB
Category	Automobile
Language	English