Saturday, August 18, 2012

M50

From the John G. Burns engine data page:

M50 - weighs 136kg
M30 - weighs 143kg


BMW M50

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BMW M50 engine
Manufacturer BMW
Production 1990–1996
Predecessor BMW M20
Successor BMW M52
Configuration Straight-6

The BMW M50 is a straight-6 DOHC piston engine which replaced the BMW M20 and was produced from 1990 to 1996.

Compared with its M20 predecessor, the M50 features twin camshafts and 4 valves per cylinder. The M50 uses an iron block with an alloy head.[1] In 1992, variable valve timing (called VANOS by BMW) was introduced.
The E36 M3 was powered by the S50 engine series, which is based on the M50.
Models
Engine Displacement Power Torque Redline Bore Stroke Year
M50B20 1,991 cc (121 cu in) 110 kW (150 hp) @ 6000 190 N·m (140 lb·ft) @ 4700 6750 80mm 66mm 1990
M50TUB20 110 kW (150 hp) @ 5900 190 N·m (140 lb·ft) @ 4200 6750 80mm 66mm 1993
M50B24 2,394 cc (146 cu in) 138 kW (185 hp) @ 5900 235 N·m (173 lb·ft) @ 4700 6550 84mm 72mm 1991
M50B25 2,494 cc (152 cu in) 141 kW (189 hp) @ 6000 245 N·m (181 lb·ft) @ 4700 6500 84mm 75mm 1990
M50TUB25 141 kW (189 hp) @ 5900 250 N·m (180 lb·ft) @ 4200 6500 84mm 75mm 1992
S50B30 2,990 cc (182 cu in) 210 kW (280 hp) @ 7000 320 N·m (240 lb·ft) @ 3600 7280 86mm 86mm 1992
S50B30US 179 kW (240 hp) @ 6000 305 N·m (225 lb·ft) @ 4250 6500 86mm 86mm 1993
S50B32 3,201 cc (195 cu in) 236 kW (316 hp) @ 7400 350 N·m (260 lb·ft) @ 3250 7600 86mm 91mm 1995


M50B20

The 1,991 cc (121 cu in) M50B20 was introduced with the 1990 520i. It has an 80 mm bore and 66 mm stroke and produces 110 kW (150 hp).[2]
Applications:

M50TUB20

The M50B20 was updated with variable valve timing (called VANOS by BMW) on the intake camshaft in 1993. Peak torque became available 500 rpm lower, at 4200 rpm.[2]
Applications:
  • 1992-1994 E36 320i
  • 1992-1996 E34 520i

M50B24

This is a 2.4 L engine based on the 2.5 L M50B25, with a reduced stroke. This engine is only fitted to Complete Knock Down kits assembled in Thailand. Power output is 188 hp (140 kW) and torque is 134 lb·ft (235 Nm).
Applications:
  • 1993-1997 E36 3-Series (Thai specification)
  • 1993-1995 E34 5-Series (Thai specification)[citation needed]

M50B25

The 2,494 cc (152 cu in) M50B25 was introduced with the 1990 525i/525ix . It has an 84 mm bore and 75 mm stroke and produces 141 kW (189 hp) at 5900 rpm and 245 N·m (181 lb·ft) at 4700 rpm.[2]
Applications:

M50TUB25

The M50B25 was updated with variable valve timing (called VANOS by BMW) on the intake camshaft in 1992. Peak torque became available 500 rpm lower, at 4200 rpm.[2]
Applications:

S50

The S50 is higher performance version of the M50 which was used in the M3.

S50B30

The S50B30 is a 2,990 cc (182 cu in) higher output version of the M50 which powered the E36 M3 (except in North America). It produces 210 kW (282 hp), has a bore of 86 mm (3 in) and a stroke of 86 millimetres (3.4 in).[3] The limited edition "M3 GT" model from 1995 had different tune and produced 216 kilowatts (290 hp).[4]
Applications:
  • 1992-1995 E36 M3 (except for North America)

S50B30US

The North American E36 M3 is powered by a detuned version of the S50 which produced 240 hp (180 kW).[5]
Applications:
  • 1993-1995 E36 M3 (North America only)

S50B32

In 1995, the 3,201 cc (195 cu in) S50B32 replaced the S50B30 (except for North American models, which used the lower output S52).[6] This engine produces 236 kW (316 hp). The compression ratio is 11.3:1, the bore is 86.4 mm (3.4 in) and the stroke is 91 mm (3.6 in).[7]
Applications:
  • 1995-1999 E36 M3 (except North America)
  • 1997-2001 Z3 coupe and roadster (except North America)

See also

References

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Resource: http://en.wikipedia.org/wiki/BMW_M50

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