| MG Series MGB
Production Period（製造期間）
- 1962/ 1980 Dec.
Chassis（シャシー）
Unit Construction body, welded steel constuction, front suspension on subframe.
Wheelbase: 7ft 7in
Track Front: 4ft 1.00in
Rear: 4 ft 1.25in
Steering（ステアリング）
Cam Gears rack & pinion system. （ラック＆ピニオン）
Turning circle（回転半径）: 32ft
Castor angle（キャスター角） 7 degrees
Camber angle（キャンバー角）: 1 degree
Kingpin angle（キングピン角）: 8 degrees
Toe in（トーイン）: 0.1875in
Grade of oil（使用オイルグレード）: SAE 90
Brakes（ブレーキ）
Disc front, drum rear. （前ソリッドディスク、後ドラム）
Disk size front（デイスク直径）: 10.75in
Drum size rear（ドラム直径）: 10in
Method of operation（作動方式）: Hydraulic（油圧）
, vacuum servo assisted as option to 1973, standard thereafter. （真空倍力装置は1973年までオプション装備、1974ＵＢモデル以降は標準装備）
Dual system some markets from '67. （1967以降は２系統システム）
Cable operated parking brake.（パーキングブレーキはケーブル方式）
Wheels（ホイール）
Either steel disc bolt-on, or Rudge type wire spoked（ボルト・オン・スチール製 又は ノックオフタイプ・賄アー・スポークホイール）. Late cars had alloy wheels as option.（後期型はオプションでアロイホイール）
For MkI, MkII-on, Wires
Rim size: 4J * 14, 5J * 14, 4.5J * 14
Tyre Size: 5,60 * 14, 165 * 14
Tyre pressure: 21psi front, 24 psi rear
Engine
4 cylinder in line（直列4気筒）, pushrod ohv （プッシュロッド式 Over Head Valve)
Bore（ボア）: 80.26mm
Stroke:(ストローク） 88.90mm
Cubic capacity（排気量）: 1789cc
Power output（出力）: Approx 94bhp @ 5500rpm.
Later cars had power outputs which varied from market to market. The other tuning details of the unit would be confusing in a table of this type. Please refer to the appropriate Workshop Manual.
Oil pressure（油圧）: Approx. 60psi. Idle at 20psi
Grade of oil（オイルグレード）: SAE 20/50
Sump Capacity（オイル量）: 7.5 pints
Ignition Timing
Varies with Engine spec., see above.
Distributor points gap: 0.015in
Sparking plugs: N9YC
Gap: 0.025in. After 1975: 0.035in
Carburetter Type
To 1973: Twin SU HS4
From 1973: Twin SU HIF4
USA Market also had single Zenith 175CD/5T from 1974/76
Jet size, main: SU 0.090in, Zenith: 0.100
Needle recommendation: Various according to carburettor spec
Clutch
Borg & Beck Single dry plate
Material: Ferodo
Number of springs: Single Diaphragm
Gearbox
Four speed manual, synchromesh on top three ratios to 1965, all synchro after. Electrical overdrive optional, standard from 1975. Borg Warner 35 automatic gearbox was also available 1967 to 1973.
Engine Prefix: 18G- 18GA 18GB on
Ratios: 3sp sync, 4sp sync, B-W auto
Overdrive (where fitted): 0.802, 0.820
Top: 1.000, 1.000, 1.00-1.33
Third o/d (where fitted): 1.10, 1.133
Third: 1.374, 1.382
Second: 2.214, 2.2167, 1.45-1.93
First: 3.640, 3.333, 2.39-3.18
Reverse: 4.760, 3.095, 2.09-2.78
Grade of oil: SAE 30, SAE 20/50 TQF
Capacity: 4.5 pints, 4.7 pints, 6 pints. Add approx. 3pints when o/d fitted
Propellor Shaft
Open shaft, needle roller u/j at each end.
Final Drive
Live axle, hypoid bevel gears.
Ratio: Manual 3.909:1, Auto 3.7:1
MPH/1000rpm: Manual top: 17.9, o/d: 22.1, Auto: 18.91
Grade of oil: SAE 90EP
Capacity: 1.5 pints
Cooling System
Pressurised, thermostatic control, pump assisted. Capacity: 12 pints.
Fuel Tank Capacity
Approx. 12 gallons. Tank located at rear of car under boot floor.
Body Styles
| |
Tourer
|
GT
|
| Numbers built: MkI |
|
|
1962
|
4518
|
|
1963
|
23308
|
|
1964
|
26542
|
|
1965
|
24179
|
524
|
1966
|
22675
|
10241
|
| MkII introduced |
|
|
1967
|
15128
|
11396
|
1968
|
17355
|
8352
|
1969
|
18896
|
12134
|
1970
|
23866
|
12704
|
1971
|
22511
|
12169
|
1972
|
26222
|
13171
|
1973
|
19546
|
10208
|
1974
|
19713
|
9638
|
1975
|
19967
|
4609
|
1976
|
25860
|
3698
|
1977
|
24482
|
4198
|
1978
|
21703
|
5652
|
1980
|
10891
|
3424
|
Dimensions & Weight
- Wheelbase: 7ft 7in
- Track - front 4ft 1in
- Track - rear 4ft 1.25in
- Overall length - 12ft 9.2in
- Overall width - 4ft 11.9in
- Overall height - 4ft 1.4in
- Ground clearance - 4.5in
- Turning circle - 32ft
- Kerb weight - 18.5cwt
Performance
- Max. Speed - 103 mph
- Acceleration - 0-60mph 12.2 secs
- Overall fuel consumption - 22mpg
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