BMW B58

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BMW B58 engine
B 58 engine on Bmw 340i.jpeg
Overview
Manufacturer BMW
Production 2015–present
Layout
Configuration Straight-6
Valvetrain DOHC
Combustion
Turbocharger Single twin-scroll
Fuel system Direct injection
Chronology
Predecessor BMW N55

The BMW B58 is a turbocharged straight-6 engine which began production in 2015.[1] The B58 replaced the N55 and was launched in the F30 340i.[2]

The B58 is part of BMW's new modular engine family - each engine using a displacement of 500 cc (30.5 cu in) per cylinder - following the B38 and B48 engine.[3]

In 2017, the B58 (installed in the M240i) topped Ward's 10 Best Engines list.

The S58 engine, to be released in early 2019, will be the high performance version of the B58.[4][5]

Design[edit]

Compared with its BMW N55 predecessor, the B58 features a 20% increase in boost pressure, a closed-deck engine block design, an increase in compression ratio to 11.0:1 and a slight increase in displacement from 2,979 cc (181.8 cu in) to 2,998 cc (182.9 cu in). The intercooler - a water-to-air design - is integrated into the intake plenum, to reduce the volume of air between the turbocharger and the cylinders.[6]

As per the N55, the B58 also features a single twin-scroll turbo, direct fuel injection, variable valve timing (called double Vanos by BMW), variable valve lift (called Valvetronic by BMW).[7][8] The redline remains at 7000 rpm, the bore is 82 mm (3.2 in) and the stroke is 94.6 mm (3.7 in).

The B58 also features an engine-mounted heat encapsulation system to reduce engine wear and emissions during start-up.[9]

As a part of BMW's new modular engine family, the crankcase is a completely new design identically with the B57 diesel version,[10] engineered as both a gasoline and diesel engine in one common part. The closed deck crankcase is equipped with a completely new structure which can be identified by a complex array of ribs on the exhaust and intake side and an additional reinforcement frame on the oil pump side.

Models[edit]

Engine Power Torque Years
B58B30M0 240 kW (322 hp)
@ 5500-6500 rpm
450 N⋅m (332 lb⋅ft)
@ 1380-5000 rpm
2015-present
250 kW (335 hp)
@ 5500 rpm
500 N⋅m (369 lb⋅ft)
@ 1520-4500 rpm
2016-present
250 kW (335 hp)
@ 5500-6500 rpm
450 N⋅m (332 lb⋅ft)
@ 1380-5200 rpm
2017-present
265 kW (355 hp)
@ 5500-6500 rpm
500 N⋅m (369 lb⋅ft)
@ 1520-4800 rpm
2016-present
B58B30M1 250 kW (335 hp)
@ 5500-6500 rpm
450 N⋅m (332 lb⋅ft)
@ 1500-5200 rpm
2018-present
B58B30O1 285 kW (382 hp) 500 N⋅m (369 lb⋅ft) 2018-present

B58B30M0: 240 kW version[edit]

Applications:

B58B30M0: 250 kW version[edit]

Applications:

B58B30M0: 265 kW version[edit]

Applications:

  • 2017-present G01 X3 M40i[13]
  • 2018-present G02 X4 M40i

B58B30M0: 265 kW version[edit]

This version was used for cars with the "M Performance Power Pack and Sound Kit".

Applications:

B58B30M1[edit]

Applications:

B58B30O1[edit]

Applications:

  • 2018-present BMW Z4 M40i (in countries not subject to EU emissions standards).

References[edit]

  1. ^ DeMattia, Nico (28 October 2015). "BMW's N55 engine will be missed, but the new B58 might be even better". BMWBlog. Retrieved 20 May 2016. 
  2. ^ "BMW F30 LCI 340i". www.paultan.org. 
  3. ^ Meiners, Jens (22 April 2011). "BMW's New Three-, Four-, and Six-Cylinder Engine Family Detailed". CARandDriver. Retrieved 21 May 2016. 
  4. ^ "BMW F97 X3 M launching in 2019 with new S58 engine and 450 horsepower". www.bmwblog.com. Retrieved 28 December 2017. 
  5. ^ "BMW Developing S58 Engine as S55 Successor, Will Debut in 2019 X3 M". www.autoevolution.com. Retrieved 28 December 2017. 
  6. ^ "BMW's New B58 3-liter Engine Won't Be a Tuner's Delight". www.autoevolution.com. Retrieved 30 December 2017. 
  7. ^ "Big Changes Under Hood in '16 BMW 3-Series". www.wardsauto.com. Retrieved 30 December 2017. 
  8. ^ "2017 BMW 2 Series Lineup Revealed with New Engines". www.automobilemag.com. Retrieved 30 December 2017. 
  9. ^ Boeriu, Horatiu (11 December 2015). "BMW's B58 engine among Wards' 10 Best engines for 2016". BMWBlog. Retrieved 21 May 2016. 
  10. ^ "How is the B58 engine (340i) improved from the venerable N55? We have answers". www.bimmerfest.com. Retrieved 30 December 2017. 
  11. ^ Sheehan, Sam (16 May 2016). "New bmw m140i m240i and plug 7 series range revealed". autocar.co.uk. Retrieved 22 May 2016. 
  12. ^ BMW (24 September 2017). "BMW G30 5 series specifications". bmw.de. Retrieved 24 September 2017. 
  13. ^ "BMW G01 X3 technical specifications". www.bmw.de. Retrieved 2017-10-12. 
  14. ^ BMW (12 June 2018). "M performance power and sound kit for 340i / 440i". www.bmw.de. Retrieved 12 June 2018. 
  15. ^ BMW (12 June 2018). "M performance power and sound kit for 540i". www.bmw.de. Retrieved 12 June 2018. 
  16. ^ "The all-new BMW X5: The Prestige SAV with the most innovative technologies". www.press.bmwgroup.com. Retrieved 2018-06-12. 
  17. ^ "2020 BMW Z4 M40i Prototype Driven: The Supra's German Brother". Car and Driver. Retrieved 2018-06-12.