BMW M30
| BMW M30 | |
|---|---|
 | |
| Overview | |
| Manufacturer | BMW AG |
| Production | 1968–1992 |
| Layout | |
| Configuration | Straight-6 |
| Displacement | 2.5 L; 152.2 cu in (2,494 cc) 2.8 L; 170.1 cu in (2,788 cc) 3.0 L; 182.2 cu in (2,986 cc) 3.2 L; 195.9 cu in (3,210 cc) 3.3 L; 201.1 cu in (3,295 cc) 3.4 L; 209.3 cu in (3,430 cc) |
| Cylinder bore | 86 mm (3.39 in) 89 mm (3.5 in) 92 mm (3.62 in) |
| Piston stroke | 71.6 mm (2.82 in) 80 mm (3.15 in) 86 mm (3.39 in) 88 mm (3.46 in) |
Block material | Cast iron |
Head material | Aluminium |
| Valvetrain | SOHC 2 valves x cyl. |
| Compression ratio | 8.0:1, 8.8:1, 9.0:1, 9.5:1, 10.0:1 |
| Combustion | |
| Turbocharger | (In Alpina B10 Biturbo) KKK K27 |
Fuel system | Solex or Zenith carburetor Fuel injection |
| Management | Bosch Jetronic or Motronic |
| Fuel type | Gasoline |
| Cooling system | Water cooled |
| Output | |
Power output | 107–265 kW (145–360 PS; 143–355 hp) |
Torque output | 211–520 N⋅m (156–384 lb⋅ft) |
| Chronology | |
| Predecessor | BMW M337 |
| Successor | BMW M50 |
The BMW M30 is a straight-6 SOHC petrol engine which was produced from 1968 to 1992. With a production run of 22 years, it is BMW's longest produced engine and was used in many car models.
The first models to use the M30 engine were the E3 2500 and 2800 sedans. The initial M30 models were produced in displacements of 2.5–3.0 litres (2,494–2,986 cc), with later versions having displacements of up to 3.4 litres (3,430 cc).[1] As per the M10 inline-four engine which it was developed from, the M30 has an iron block, an aluminium cylinder head and overhead valves with two valves per cylinder.
The engine has been given the nicknames of 'Big Six' and 'Senior Six', following the introduction of the M20 straight-6 engine in the late 1970s. The M30 was produced alongside the smaller M20 engine throughout the M20's production, and prior to the introduction of the BMW M70 V12 engine in 1987, the M30 was BMW's most powerful and largest regular production engine.
Following the introduction of the DOHC M50 engine in 1990, the M30 began to be phased out.
Ward's have rated the M30 as one of the "Top Engines of the 20th Century".[2]
Contents
1 Design
2 M90 engine
3 Models
3.1 M30B25V
3.2 M30B25
3.3 M30B28V
3.4 M30B28
3.5 M30B30V
3.6 M30B30
3.7 M30B32
3.8 M30B33V
3.9 M30B34
3.10 M30B35
4 Turbocharging
5 Motorsport
6 See also
7 References
Design
The M30 was originally developed in the late 1960s, loosely based on the M10 straight-4 engine first used in the 'Neue Klasse' BMW 1500.[3](p70) Initially, the engine code was "M06", until it was later[when?] renamed the M30.[4][5]
Common features between the M10 and M30 include a profile lowering 30-degree slant to the right, a crossflow cylinder head (a gas flow head in later designs) and chain-driven camshaft with rocker arm valve actuation.[6] Further similarities include a cast-iron block with an aluminium head and a forged crankshaft. The first two M30 engines introduced were the 2.8 litres (2,788 cc) and the 2.5 litres (2,494 cc) versions, which both used an 86 mm (3.39 in) bore.[3]
M90 engine
The M90 engine, used in several models from 1979-1982, combines the block from the motorsports BMW M88 engine with the M30's SOHC cylinder head.
Models
| Version | Displacement | Power output | Torque | Bore x stroke | Year |
|---|---|---|---|---|---|
| M30B25V | 2.5 L; 152.2 cu in (2,494 cc) | 110 kW (150 PS; 148 hp) at 6,000 rpm | 211 N⋅m (156 lb⋅ft) at 3,700 rpm | 86 mm × 71.6 mm (3.39 in × 2.82 in) | 1968 |
| M30B25 | 215 N⋅m (159 lb⋅ft) at 3,700 rpm | 1981 | |||
| M30B28V | 2.8 L; 170.1 cu in (2,788 cc) | 125 kW (170 PS; 168 hp) at 6,000 rpm | 235 N⋅m (173 lb⋅ft) at 3,700 | 86 mm × 80 mm (3.39 in × 3.15 in) | 1968 |
| M30B28 | 135 kW (184 PS; 181 hp) at 5,800 rpm | 240 N⋅m (177 lb⋅ft) at 4,200 rpm | 1977 | ||
| M30B30V | 3.0 L; 182.2 cu in (2,986 cc) | 132 kW (179 PS; 177 hp) at 6,000 rpm | 255 N⋅m (188 lb⋅ft) at 3,700 rpm | 89 mm × 80 mm (3.50 in × 3.15 in) | 1971 |
| M30B30 | 149 kW (203 PS; 200 hp) at 5,500 rpm | 272 N⋅m (201 lb⋅ft) at 4,300 rpm | 1971 | ||
| M30B32 | 3.2 L; 195.9 cu in (3,210 cc) | 147 kW (200 PS; 197 hp) at 5,500 rpm | 285 N⋅m (210 lb⋅ft) at 4,300 rpm | 89 mm × 86 mm (3.50 in × 3.39 in) | 1976 |
| M30B33V | 3.3 L; 201.1 cu in (3,295 cc) | 139 kW (189 PS; 186 hp) at 5,500 rpm | 289 N⋅m (213 lb⋅ft) at 3,500 rpm | 89 mm × 88 mm (3.50 in × 3.46 in) | 1973 |
| M30B34 | 3.4 L; 209.3 cu in (3,430 cc) | 160 kW (218 PS; 215 hp) at 5,800 rpm | 310 N⋅m (229 lb⋅ft) at 4,200 rpm | 92 mm × 86 mm (3.62 in × 3.39 in) | 1982 |
| M30B35 | 155 kW (211 PS; 208 hp) at 5,700 rpm | 305 N⋅m (225 lb⋅ft) at 4,000 rpm | 1988 |
M30B25V
BMW M30 with carburettor
in BMW Museum
M30 production in Munich
M30 production in Munich
The first 2.5 litres (2,494 cc) version of the M30 was introduced in the 1968 E3 2500. This version uses dual Solex Zenith 35/40 INAT carburettors, has a compression ratio of 9.0:1 and produces 110 kW (150 PS; 148 hp) in most applications.
The M30B25 has previously been called the M06 and M68, prior to BMW retroactively renaming it the M30B25V (V for Vergaser- carburettor in German).[7]
Applications:
- 1968–1977 E3 2500
- 1974–1975 E9 2.5 CS
- 1973–1976 E12 525 — 107 kW (145 PS; 143 bhp), Solex 4A1 carburettor
- 1976–1981 E12 525
- 1977–1979 E23 725[8]
M30B25
In 1981, Bosch L-Jetronic electronic fuel injection was added to the 2.5 litres (2,494 cc) version. Peak power remained unchanged at 110 kW (150 PS; 148 hp), however torque increased slightly to 215 N⋅m (159 lb⋅ft).
Applications:
- 1981-1987 E28 525i[9]
- 1981-1986 E23 725i[10][11]
M30B28V
The M30B28V version produces up to 125 kW (170 PS; 168 hp) and 235 N⋅m (173 lb⋅ft),[3](p77) depending on the model year, carburettor and country. It has a compression ratio of 9.0:1 and initially used dual Zenith 35/40 INAT carburettors.
This version has also been known as the M06 and M68, prior to BMW renaming it the M30B28V.
Applications:
- 1968-1977 E3 2800 / 2.8L — 125 kW (170 PS; 168 hp)[12][13]
- 1968-1971 E9 2800 CS
- 1971-1971 E3 Bavaria — United States only
- 1974-1976 E12 528 — 121 kW (165 PS; 162 hp), dual Zenith INAT carburettors[14](p89)[15][16]
- 1976-1978 E12 528 — 125 kW (170 PS; 168 hp), Solex 4A1 carburettor[17](p25)
- 1977-1979 E23 728 — 125 kW (170 PS; 168 hp), Solex 4A1 carburettor[18]
M30B28
In 1977, Bosch L-Jetronic electronic fuel injection was added to the 2.8 litres (2,788 cc) version.[13] Power increased to 135 kW (184 PS; 181 hp) and torque increased to 240 N⋅m (177 lb⋅ft).
- 1977-1978 E12 528i — North America only, 129 kW (175 PS; 173 hp), 9.0:1 compression ratio[19]
- 1978-1981 E12 528i
- 1979-1986 E23 728i
- 1979-1987 E24 628CSi
- 1981-1987 E28 528i[20]
M30B30V
Based on the M30B28V version with a 3 mm (0.12 in) larger bore, the M30B30V produces 132 kW (179 PS; 177 hp) and 255 N⋅m (188 lb⋅ft),[21][22] uses dual Zenith 35/40 INAT carburettors and has a compression ratio of 9.0:1.
Applications:
- 1971-1975 E9 3.0 CS
- 1971-1972 E9 3.0 CSL
- 1971-1974 E3 3.0 S / 3.0 L / Bavaria
- 1976-1979 E24 630 CS — 136 kW (185 PS; 182 hp), Pierburg 4A1 carburetor[13][23]
- 1977-1979 E23 730 — 135 kW (184 PS; 181 hp), Solex 4 A 1 carburettor[24]
M30B30
The fuel injected version of the 3.0 litres (2,986 cc) M30 debuted in 1971 in the E9 3.0 CSi and initially used the Bosch D-Jetronic mechanical fuel injection system.[25] In 1976, the fuel injection system was upgraded to Bosch L-Jetronic electronic fuel injection.[25] The M30B30 produces up to 149 kW (203 PS; 200 hp) and 272 N⋅m (201 lb⋅ft),[26][27] depending on the model year and whether a catalytic converter is fitted. The compression ratio is 9.5:1.
Applications:
- 1971-1975 E9 3.0 CSi — 149 kW (203 PS; 200 hp)
- 1972-1973 E9 3.0 CSL — 149 kW (203 PS; 200 hp)
- 1972-1975 E3 3.0 Si — 147 kW (200 PS; 197 hp)
- 1975-1978 E12 530i — North America only, 131 kW (178 PS; 176 hp)[28]
- 1976-1976 E12 530 MLE — South Africa only, 147 kW (200 PS; 197 hp)[29]
- 1977-1978 E24 630CSi — North America only, 129 kW (175 PS; 173 hp)[30]
- 1986-1992 E32 730i — 138 kW (188 PS; 185 hp)[31]
- 1988-1990 E34 530i — 138 kW (188 PS; 185 hp)
M30B32
Despite having a capacity of 3.2 L; 195.9 cu in (3,210 cc), this engine appeared in many cars badged so as to suggest 3.3 litres (3,295 cc) of displacement- such as the 633i, 3.3 Li, and 733i. The compression ratio is 8.8:1. In the E24 633CSi, it uses Bosch L-Jetronic electronic fuel injection.[13] The US version used L-Jetronic from 1978 until mid-1981, changing over to Motronic digital fuel injection in June of that year. The 1979 732i is BMW's first use of Bosch's Motronic fuel injection.[32]
Applications:
- 1973-1975 E9 3.0 CSL — 152 kW (207 PS; 204 hp), 3.2 L; 192.4 cu in (3,153 cc)
- 1976-1984 E24 633CSi — 145–147 kW (197–200 PS; 194–197 hp) in Euro spec, 128–130 kW (174–177 PS; 172–174 hp) in USA spec
- 1976-1979 E3 3.3 Li — 147 kW (200 PS; 197 hp)[33]
- 1977-1984 E23 733i — 147 kW (200 PS; 197 hp) in Euro spec,[34] 130–145 kW (177–197 PS; 174–194 hp) in USA spec
- 1979-1981 E12 533i — North America only, 135 kW (184 PS; 181 hp)[35]
- 1979-1986 E23 732i — 144 kW (196 PS; 193 hp)
- 1982-1984 E28 533i — North America only, 135 kW (184 PS; 181 hp)
- 1984-1986 E30 333i — South Africa only, 145 kW (197 PS; 194 hp)
M30B33V
The carburetted M30B33 produces 139 kW (189 PS; 186 hp) and 289 N⋅m (213 lb⋅ft).[36]
Applications:
- 1973-1975 E3 3.3 L[37]
M30B34
The M30B34 engines sold in Europe and most other markets used a 10.0:1 compression ratio and produced 160 kW (218 PS; 215 hp).[38] In North America and Japan, the M3034 used an 8.0:1 compression ratio and produced 136 kW (185 PS; 182 hp).[39] In all markets, the Bosch Motronic digital fuel injection system was used.
Applications:
- 1982-1987 E23 735i / L7
- 1982-1987 E24 635CSi / L6 — 163 kW (222 PS; 219 hp) in Euro spec[13]
- 1985-1988 E28 535i / 535is / M535i
M30B35
M30B35
This engine has a capacity of 3.4 litres (3,430 cc), despite the "B35" model code. It produces 155 kW (211 PS; 208 hp) and 305 N⋅m (225 lb⋅ft), has a compression ratio of 9.0:1 and uses Bosch Motronic 1.3 digital fuel injection.[13]
Applications:
- 1988-1989 E24 635CSi
- 1986-1992 E32 735i[40]:p2[41]
- 1987-1992 E34 535i
- 1988-1989 Rayton Fissore Magnum 3.5[42]
Turbocharging
The M30 was the basis for the turbocharged M102 and M106 engines.
The Alpina B10 Biturbo used a modified version of the M30, with two turbochargers and forged pistons. Producing 265 kW (360 PS; 355 hp) at 6000 rpm and 520 N⋅m (384 lb⋅ft) at 4000 rpm, the engine made this car the fastest sedan in the world. The final 50 M30 blocks were shipped to Alpina for use in the final 50 B10 Biturbos.[43]
Motorsport
E24 635 CSi Group A
The M30 powered a series of E9 and 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 M88 high-performance engine is based on the M30 block.[44]
See also
 | Wikimedia Commons has media related to BMW M30 engine. |
BMW M10, the inline-4 engine that the M30 was based on.
BMW M20, the smaller straight-6 which was sold alongside the M30 for many years.
BMW M88, the high-performance straight-6 engine that was sold alongside the M30 from 1978 to 1989 and was used in the E26 M1, E24 M635CSi and E28 M5
BMW S38, the catalyzed version of, and ultimate successor to the M88, which was sold alongside the M30 from 1986 to 1995.
References
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^ "1986 BMW 725i (model up to mid-year 1986 for Europe ) specifications". www.automobile-catalog.com. Retrieved 1 September 2017.
^ "1975 BMW 2.8 L E3 specifications & stats". www.carfolio.com. Retrieved 29 December 2018.
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^ "1974 BMW E12 5 Series 528 Technical Specifications". www.ultimatespecs.com. Retrieved 1 September 2017.
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| 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | |
| straight-4 | M10>> | |||||||||||||||||||||||||||||||||||||||
| straight-6 | <<M78 | M78*>> | M30>> | |||||||||||||||||||||||||||||||||||||
| M337 | M20>> | |||||||||||||||||||||||||||||||||||||||
| <<M328 | M88 >> | |||||||||||||||||||||||||||||||||||||||
| <<M335 | ||||||||||||||||||||||||||||||||||||||||
| V8 | OHV V8 | |||||||||||||||||||||||||||||||||||||||
| *made in the Soviet Occupation Zone by Autovelo | ||||||||||||||||||||||||||||||||||||||||
