BMW B58


The BMW B58 is a turbocharged straight-six engine, which began production in 2015. The B58 replaced the N55 and was launched in the F30 340i.
The B58 is part of BMW's new modular engine family, each engine using a displacement of per cylinder, following the B38 and B48 engine.
The B58 engine was named Ward's 10 Best Engines in 2016, 2017, 2019 and 2020.
The S58 engine, which was released in early 2019, is the high performance version of the B58.

Design

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 with added weight of.
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.
As per the N55, the B58 also features a single twin-scroll turbo, direct fuel injection, variable valve timing, variable valve lift. The redline remains at 7,000 rpm, the bore and the stroke is.
The B58 also features an engine-mounted heat encapsulation system to reduce engine wear and emissions during start-up.
As a part of BMW's new modular engine family, the crankcase is a completely new design identical to the B57 diesel version, 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

B58B30M0: 240 kW (321 HP) version

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This version was used for 3-/4-Series with the "M Performance Power and Sound Kit".
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The S58 engine is the high performance version of the B58 engine. It was introduced in the F97 X3 M and F98 X4 M, marking the first time a stand-alone M model was produced for the X3 and X4.

S58B30T0: 353 kW (480 PS)

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