MG MGB User Manual

ENGINE
TUNING
DATA
18V ENGINES—To
European
emission
control
requirements (ECE
15)
ENGINE
Type
Displacement
.
Firing
order
Compression
ratio
Cranking
pressure
.. ..
Valve
rocker clearance:
set
cold
..
Idle
speed
Fast
idle speed
Stroboscopic
ignition
timing
Static
ignition
timing
Timing mark location
DISTRIBUTOR
Make/Type
Contact
breaker
gap
..
Contact
spring tension
Rotation of
rotor
Dwell angle
Serial number
..
Centrifugal
advance
Crankshaft degrees/Speed
(vacuum
pipe
disconnected)
Vacuum advance
Starts
Finishes
..
..
Total crankshaft
degrees
IGNITION
COIL
Make/Type
Resistance:
Primary
..
SPARKING
PLUGS
Make/Type
Gap
CARBURETTERS
Make/Type
Specification
Jet
Needle
Piston
spring
EXHAUST
EMISSION
Exhaust
gas
analyser
reading
at
engine
idle
speed
Engine
Tuning
Data 6
18V.
109.8
cu.
in.
(1798
c.c.).
1, 3,
4, 2.
9.0
:
1.
Nominal
170
to
l901bf./sq.
in.
(12
to
13.4
kgf./cm.’).
.015
in.
(.38
mm.).
750
r.p.m.
1,100
to
1,200
r.p.m.
15°
B.T.D.C.
at
1,000
r.p.m.
5°
B.T.D.C.
Pointer
on
timing
case,
notch
on
crankshaft
pulley.
Lucas/25D4.
.014
to
.016
in.
(.35
to
.40
mm.).
18
to
24
oz.
(510
to
680
gm.).
Anti-clockwise.
60°t3°.
41032.
0
to
3°
at
600
r.p.m.
O
to
4°
at
700
r.p.m.
2
to
7°
at
900
r.p.m.
10
to
14°
at
1,600
r.p.m.
17
to
21°
at
2,200
r.p.m.
3
in.
Hg.
(76
mm.
Hg).
8
in.
Hg.
(203
mm.
Hg.).
14°i2°.
Lucas/HA12.
3.1
to
3.5 ohms
at
20° C.
(68°
F.).
Champion/N9Y.
.024
to
.026
(«.625
to
.66
mm.).
SU/HIF4.
AUD
434.
.090
in.
(2.2
mm.).
AAU.
Red.
3
to
4.5%
CO.
MGB.
Issue
3.
86842

MG MGB Specifications

General

Brand	MG
Model	MGB
Category	Automobile
Language	English