Mitsubishi Vulcan engine

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2G2
Mitsubishi 2G23 with 4th Minica.jpg
Overview
Manufacturer Mitsubishi Motors
Also called Vulcan
Production 1972–1989
Chronology
Predecessor Mitsubishi 2G1 engine
Successor Mitsubishi 3G8 engine

The Mitsubishi Vulcan engine, identified by the code 2G2, is an iron-block twin cylinder engine with three main bearings, built by Mitsubishi Motors for kei car class vehicles from September 1972. It was an overhead camshaft design, and superseded the older two-stroke 2G1 series. The 2G2 was in turn replaced by the Multi-valve 3G8 three-cylinder series.

2G21[edit]

Specifications[edit]

Engine type Twin cylinder OHC
Displacement 359 cc
Bore x stroke 62.0 x 59.6 mm
Fuel type Regular gasoline
Peak power 22 kW (30 PS) at 6,000 rpm (Minica F4, Minicab 4)

"Vulcan S", December 1974 on, with "Silent Shaft" balance shafts. (MCA-II)

24 kW (32 PS) at 8,000 rpm (Minica F4)

First version, without balance shafts. (MCA)

26 kW (36 PS) at 8,500 rpm (Minica F4 GS, GSL, Minica Skipper IV)

"Sports Series" with twin carbs. The F4 sports series was discontinued in October 1973.

Peak torque  ?? N·m (?? lb·ft) at ??00 rpm (MCA-II)
3.0 kg⋅m (29.4 N⋅m) at 5,500 rpm (MCA)
3.2 kg⋅m (31.4 N⋅m) at 6,500 rpm (twin-carb sports)

"MCA" stood for "Mitsubishi Clean Air", reflecting Japan's new air quality laws. The MCA-II was cleaner yet, and with balance shafts it also offered a much smoother run, at the loss of a few horsepower. The Sports engine did not meet the stricter emissions laws, which led to the demise of the Skipper.

Applications[edit]

2G22[edit]

Specifications[edit]

Engine type Twin cylinder SOHC
Displacement 471 cc
Bore x stroke 65.0 x 71.0 mm
Fuel type Regular gasoline, 9.0:1 compression
Peak power 21 kW (28 PS) at 6000 rpm: Minica 5 Van, Minicab 5

22 kW (30 PS) at 6500 rpm: Minica 5 Sedan

Peak torque 3.7 kg⋅m (36.3 N⋅m) at 4000 rpm (all)[1]

This engine met the enlarged kei-jidosha regulations which took effect in 1975. It was called the Vulcan S in period advertising. It had been thought that the rules would only allow for 500 cc, so a number of manufacturers had to quickly develop 550 cc models. The 2G22 was only built for ten months.

Applications[edit]

2G23[edit]

The G23B engines also featured the MCA-JET improved emissions system with a catalytic converter and three valves per cylinder. For the last two years (until summer of 1989), production was only for the Mazda Porter.

Specifications[edit]

Engine type Twin cylinder SOHC
Displacement 546 cc
Bore x stroke 70.0 x 71.0 mm
Fuel type Regular gasoline
Peak power 22 kW (29 PS) at 5500 rpm (2G23) Minicab 55 Wide/Minica 55 Van/Econo only (with catalytic converter), Mazda Porter Cab

23 kW (31 PS) at 5500 rpm (2G23) Minica, Minicab after 1979

23 kW (31 PS) at 5500 rpm (G23B Vulcan II with timing chain)

23 kW (31 PS) at 6000 rpm (G23B Vulcan II with timing belt), 84-87 Minica Econo, Minicab

24 kW (33 PS) at 6000 rpm (G23B Vulcan II with timing belt), 84-87 Minica

29 kW (39 PS) at 5500 rpm (G23B Turbo), Minica Ami/Econo 03.83-02.84

31 kW (42 PS) at 6000 rpm (G23B Turbo Intercooler)

Peak torque 4.1 kg⋅m (40.2 N⋅m) at 3000 rpm (2G23)

4.2 kg⋅m (41.2 N⋅m) at 3000 rpm (2G23) in Minica 55 Van, Minicab 55 Wide until 1979

4.2 kg⋅m (41.2 N⋅m) at 3500 rpm (G23B)

43 (or 44) Nm at 3500 rpm (84-87)

54 Nm at 3500 rpm (G23B Turbo)

57 Nm at 3500 rpm (G23B Turbo Intercooler)

Applications[edit]

2G24[edit]

Specifications[edit]

Engine type Twin cylinder SOHC
Displacement 644 cc
Bore x stroke 76.0 x 71.0 mm
Fuel type Regular gasoline
Peak power  ?
Peak torque  ?

Produced 8.82-12.83

Applications[edit]

2G25[edit]

Specifications[edit]

Engine type Twin cylinder SOHC
Displacement 783 cc
Bore x stroke 78.0 x 72.0 mm (according to various sources, although this would make it 688 cc)
Fuel type Regular gasoline
Peak power  ?
Peak torque  ?

Produced 1.84-11.88

Applications[edit]

See also[edit]

References[edit]

  1. ^ 自動車ガイドブック [Automobile Guide Book] (in Japanese). Japan: Japan Automobile Manufacturers Association. 23: 156, 173. 1976-10-20. 0053-760023-3400.  Missing or empty |title= (help)
  2. ^ CG '70s Car Archives, p. 71