BMW M30

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BMW M30
Overview
Manufacturer BMW
Production 1968–1994
Combustion chamber
Configuration Straight-6
Chronology
Successor BMW M60 V8
BMW M52

The BMW M30 (early models are sometimes referred to as "M06") is a straight-6 SOHC piston engine which was used over a 28 year lifespan over many BMW models. Ward's have rated the M30 as one of the "Top Engines of the 20th Century".[1]

It has been given the nicknames of 'Big Six' and 'Senior Six', following the introduction of the smaller BMW M20 straight-6 in the late 1970s.

Development

The M30 was originally developed in the late 1960s based on the straight-4 BMW M10 engine first used in the 'Neue Klasse' BMW 1500. Several features, including a 30-degree cant to the right for a lower profile, a crossflow head design, and a chain-driven single overhead cam with rocker arm valve actuation, are common between the M10 and the M30.[2]

Models

EngineDisplacementPowerTorqueRedlineCRYear
2500 version2479 cc110 kW (147 hp) @ 6000211 N·m (156 lb·ft) @ 3700 9.01968
2800 version2769 cc125 kW (168 hp) @ 6000234 N·m (173 lb·ft) @ 3700 9.01968
3.0CS version2966 cc132 kW (177 hp) @ 6000255 N·m (188 lb·ft) @ 3700 9.01971
3.0CSi version2966 cc147 kW (197 hp) @ 5500272 N·m (201 lb·ft) @ 4300 9.51971
M30B252494 cc110 kW (147 hp) @ 6000211 N·m (156 lb·ft) @ 3700 9.01973
M30B28
carburetor		2788 cc125 kW (168 hp) @ 5800233 N·m (172 lb·ft) @ 4000 9.31975
M30B28
injected		2788 cc135 kW (181 hp) @ 5800240 N·m (180 lb·ft) @ 42006500 9.31978
M30B302986 cc130-140 kW 1975
M30B323210 cc145 kW (194 hp) @ 5500285 N·m (210 lb·ft) @ 4300 1976
M30B34
North America		3428 cc136 kW @ (182 hp) 5400290 N·m (210 lb·ft) @ 400062008.01985
M30B34
Europe		3428 cc136 kW @ (218 hp) 5800310 N·m (230 lb·ft) @ 420010.01985
M30B353428 cc155 kW (207 hp) @ 5700305 N·m (225 lb·ft) @ 40006200 9.01988

2500 version

The first model to use the 2478 cc version of the M30 was the E3 2500 in 1968.

Applications:

  • 1968-1972 E3 2500
  • 1974-1975 E9 2.5 CS

2800 version

The first models to use the 2769 cc version of the M30 were the E3 2800 and E9 2800CS in 1968.

This version has an 86 mm bore and 80 mm stroke. Two Solex "35/40 INAT" carburetors are used, the compression ratio is 9.0:1 and the engine produces 170 hp (130 kW) and 185 lb·ft (251 N·m).

Applications:

  • 1968-1971 E3 2800
  • 1971 E3 Bavaria
  • 1968-1971 E9 2800CS

3.0CS version

The first model to use the 2966 cc version of the M30 was the E9 3.0CS.

Applications:

  • 1971-1975 E9 3.0CS
  • 1972-1974 E3 3.0S
  • 1972-1974 E3 Bavaria

3.0CSi version

This was the first fuel-injected M30 version.

Applications:

  • 1971-1975 E9 3.0CSi
  • 1972-1973 E9 3.0CSL
  • 1974-1975 E3 3.0Si

M30B25

At 2494 cc, this is the smallest of the M30 engines. Unless otherwise noted, these engines use a carburetor.

Applications:

  • 1973–1976 E12 525 (107 kW)
  • 1975-1979 E23 725 (110 kW)
  • 1976–1981 E12 525 (110 kW)
  • 1981–1987 E28 525i (110 kW, fuel injected)[3]

M30B28

A 2788 cc version of the M30, first released as the lowest specification E12 5 series. It has a bore of 86 mm, a stroke of 80 mm and a displacement of 2,788 cc (170.1 cu in).[4] In the E24 628 CSi, it uses Bosch L-Jetronic fuel injection.[4]

Applications:

  • 1975-1976 E12 528 (125 kW, carburetor)[5]
  • 1977-1979 E23 728 (125 kW, carburetor)
  • 1976-1978 E12 528 (130 kW, carburetor)
  • 1977-1978 E12 528i (129 kW, fuel injected, lower compression ratio, North America only)
  • 1978-1981 E12 528i (135 kW, fuel injected)
  • 1979-1986 E23 728i (135 kW, fuel injected)
  • 1979–1987 E24 628CSi (135 kW, fuel injected)
  • 1981-1987 E28 528i (135 kW, fuel injected)[6]

M30B30

This version was produced from 1975-1992. It has a bore of 89 mm, a stroke of 80 mm and a displacement of 2895 cc.

Applications:

  • 1975–1978 E12 530 (130 kW, injected, South Africa only)
  • 1975–1978 E12 530i (131 kW, injected, North America only)
  • 1976 E12 530 MLE (147 kW, injected, South Africa only)
  • 1976–1979 E24 630CS (Pierburg 4A1 downdraft carburetor)[4]
  • 1977–1978 E24 630CSi (injected, North America only)
  • 1977-1979 E23 730 (135 kW, carburetor)
  • 1986–1992 E32 730i (138 kW)
  • 1988–1990 E34 530i (not sold in North America)

M30B32

Despite having a capacity of 3210 cc, this engine appeared in many cars badged 533i, 633i and 733i. It has a bore of 89 mm, a stroke of 86 mm and a capacity of 3210 cc. In the E24 633CSi, it uses Bosch L-Jetronic fuel injection.[4] The US version used L-Jetronic from 1978 to 1982, then changed on 6/82 to Motronic fuel injection.

Applications:

  • 1976–1982 E24 633CSi
  • 1977-1979 E23 733i (145 kW)
  • 1979 E12 533i
  • 1979–1986 E23 732i (144 kW)
  • 1983–1984 E28 533i (North America only)
  • 1984-1986 E30 333i (145 kW, South Africa only)

M30B34

This engine has a bore of 92.0 mm, a stroke of 86.0 mm and a displacement of 3428cc. In the E24 635CSi, it uses Bosch Motronic 1.0 fuel injection.[4]

With catalytic converter: 8.0:1 compression ratio, 185 brake horsepower (138 kW) - mostly North America and Japan

Applications:

  • 1982–1987 E24 635CSi
  • 1982-1987 E23 735i (160 kW)
  • 1985-1988 E28 535i (136 kW, North America only)
  • 1985-1987 E23 735i (136 kW, North American and Japan only)
  • 1986-1987 E23 L7 (136 kW, North American and Japan only)
  • 1987 E24 L6 (North America only)
  • 1987-1988 E28 535is (136 kW, North America only)


Without catalytic converter: 10.0:1 compression ratio, 218 metric horsepower (160 kW) - Europe and rest of the world

Applications:

  • 1978-1981 E24 635CSi
  • 1979-1981 E12 M535i
  • 1979-1986 E23 735i
  • 1985-1988 E28 535i/M535i

M30B35

It has a bore of 92 mm, a stroke of 86 mm and a capacity of 3428 cc. In the E24 635CSi, it uses Bosch Motronic 1.3 fuel injection.[4]

  • 9.0:1 compression ratio
  • 211 metric horsepower (155 kW) at 5,700 rpm
  • 225 lb·ft (305 N·m) torque at 4,000 rpm
  • 87 AKI / 91 RON octane fuel or better recommended


Applications:

Turbocharging

Main articles: BMW M102 and BMW M106

The M30 was the basis for the turbocharged M102 and M106 engines.

Motorsport

The M30 powered a series of BMW 6-cylinder E9 and BMW E24 coupes to European Touring Car Championship (ETCC) throughout the 1970s and into the middle 1980s, even though a more powerful DOHC 24-valve head had been developed for high-performance motorsports and street use.

The BMW M88 high-performance engine is based on the M30 block.[8]

See also

  • BMW M10, the straight-4 engine that the M30 was based on.
  • BMW M20, the smaller straight-6 which was sold alongside the M30 for many years.

References

  1. ↑ http://www.pacemotors.com.au/ArticleView.asp?ArticleID=4
  2. ↑ Cranswick, Marc (2010). The BMW 5 series and X5 : a history of production cars and tuner specials, 1972-2008. Jefferson, N.C.: McFarland. ISBN 0786443510. 
  3. ↑ http://www.carinf.com/en/666086146.html
  4. ↑ 4.0 4.1 4.2 4.3 4.4 4.5 Oswald, Werner (1. Auflage 2001). Deutsche Autos 1945-1990, Band 4. Stuttgart: Motorbuch Verlag. ISBN 3-613-02131-5. 
  5. ↑ http://www.carfolio.com/specifications/models/car/?car=17589
  6. ↑ http://www.carfolio.com/specifications/models/car/?car=31713
  7. ↑ Büschi, Hans-Ulrich, ed. (March 9, 1989). Automobil Revue 1989 (in German/French) 84. Berne, Switzerland: Hallwag AG. p. 498. ISBN 3-444-00482-6. 
  8. ↑ http://www.bmwmregistry.com/model_faq.php?id=4

External links

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