The BMW N63 is a twin-turbo DOHC V8 engine which has been in production since 2008 to present. The N63 is the world's first production car engine to use a "hot-vee" layout, with the turbochargers located inside the "V" of the engine. The N63 is also BMW's first V8 engine to use direct injection. The engine was first used in the 2008 BMW X6 xDrive50i.
The N63 replaced the naturally aspirated N62. Due to the presence of turbocharging, the N63 does not use a variable-length intake manifold, and initial versions of the N63 do not have variable valve lift (Valvetronic).
In December 2014, BMW North America released a voluntary recall ("Customer Care Package") relating to issues with timing chain stretch, fuel injectors, mass air flow sensors, crankcase vent lines, battery, engine vacuum pump, low pressure fuel sensor and revising the oil service interval.
The S63 engine is the high-performance version (M version) of this engine.
Alpina versions of the N63 are used in various F01 7 Series, F10 5 Series, G11 7 Series and G30 5 Series models.
Video BMW N63
Design
The airflow path through the engine uses a "hot-vee" layout, where the exhaust manifolds and turbochargers are located between the cylinder banks (on the "inside" of the V8) and the intake manifolds are located on the outside of the engine. This is opposite to the traditional layout for a V8, where the intake is inside the "V" and the exhaust manifold is on the outside. The hot-vee layout reduces the width of the engine and decreases the exhaust runner length from the exhaust valves to the turbochargers. The engine uses air-to-water intercoolers, therefore improving throttle response.
Similar to the N54B30, initial N63 variants (including the S63) do not use variable valve lift (Valvetronic), because its benefit of reducing of intake vacuum is not as important in turbocharged engines.
The N63/S63 uses a bore of 89 mm (3.5 in) and a stroke of 88.3 mm (3.5 in) (except for the Chinese market 4.0 litre variant).
2012 technical update
In 2012, a "Technical Update" was applied to the N63, resulting in the N63TU variants (also known as N63B44O1). The main upgrade was the addition of Valvetronic. Other changes include revised turbochargers, removal of the blowoff valve, lighter pistons, forged conrods and crankshaft, addition of an oil catch can system, revised fuel system and addition of a second coolant pump.
2016 technical update
A second Technical Update occurred in 2016, resulting in the N63TU2 variants (also known as N63B44O2). The major changes are the use of twin-scroll turbochargers, a wider powerband and the oil/coolant heat exchanger being moved to within the "V" of the engine.
Maps BMW N63
Models
N63B40A
This smaller variant was sold in the Chinese market. Due to a shorter stroke length of 80 mm (3.1 in), the capacity is reduced to 3,982 cc (243.0 cu in).
Applications:
- 2012-2017 F12/F13 650i (China only, 300 kW version)
- 2012-2017 F01/F02 750i/750Li (China only, 330 kW version)
N63B44O0
The initial version of the N63 produces 300 kW (402 bhp) and 600 N?m (443 lb?ft).
Applications:
- 2008- 2013 E71 X6 xDrive50i
- 2009- 2012 F01/F02 750i/750Li sDrive/xDrive
- 2010- 2012 F07 550i GT sDrive/xDrive
- 2011- 2013 F10/F11 550i sDrive/xDrive
- 2011- 2013 E70 X5 xDrive50i
- 2012- 2012 F12/F13 650i sDrive/xDrive
- 2011-2014 Wiesmann GT MF4
N63B44O1 (N63TU)
The first technical update resulted in an increase of 30 kW (40 bhp) and 50 N?m (37 lb?ft).
Applications:
- 2013- F01/F02 750i/750Li sDrive/xDrive
- 2013- F07 550i GT sDrive/xDrive
- 2014- F10/F11 550i sDrive/xDrive
- 2014- F15 X5 xDrive50i
- 2013- F12/F13 650i sDrive/xDrive
N63B44O2 (N63TU2)
The second technical update resulted in peak torque being produced over a 200 rpm wider band.
Applications:
- 2016- G12 750i/750Li sDrive/xDrive
- 2017- G30 M550i xDrive
S63
The S63 is BMW's Motorsport division version of the N63, which debuted in the BMW X6 M. The S63 uses two twin-scroll turbochargers plus a pulse tuned, cross-engine exhaust manifold to keep constant exhaust pulses flowing to the turbos at every 180 degree rotation.
S63B44O0
Applications:
- 2010-2013 E70 X5 M
- 2010-2013 E71 X6 M
- 2011-2014 Wiesman GT MF5
S63B44T0
A technical update to the S63, known as the S63B44T0, debuted on the F10 M5 sedan. This version uses Valvetronic, a 10:1 compression ratio (compared with 9.3:1 for the non-TU version) and 1.5 bar of boost (compared with 1.3). It is the first BMW M engine to use Valvetronic. The rev limit was increased from 6800 rpm to 7200 rpm.
Applications:
- 2011-2017 F10 M5
- 2012-present F12/13 M6
- 2013-present F06 M6 Gran Coupe
S63B44T2
The S63B44T2 debuted on the 2015 X5 M and X6 M models.
Applications:
- 2015-present F85 X5 M
- 2015-present F86 X6 M
S63B44T4
The S63B44T4 is debuting on the 2018 M5.
Applications:
- 2018-present F90 M5
Alpina
Alpina uses a variant of the N63 engine, which was hand-assembled at the Alpina plant in Buchloe before being transported to the BMW production line.
For the 2013 model year, the Alpina engine received Valvetronic like all other N63 engines.
M1
Applications:
- 2009-2012 Alpina B7 Bi-Turbo: based on the BMW F01 7 Series
- 2010-2011 Alpina B5 Bi-Turbo Sedan/Touring: based on the BMW F10/F11 5 Series
M1/1
Applications:
- 2012-2014 Alpina B5 Bi-Turbo Sedan/Touring: based on the BMW F10/F11 5 Series
M1/2
Applications:
- 2011-2015 Alpina B6 Bi-Turbo Coupé/Cabrio: based on the BMW F12/F13 6 Series
M2, M2/1
Applications:
- 2014-2015 Alpina B6 Bi-Turbo Gran Coupé: based on the BMW F06 6 Series
- 2012-2015 Alpina B7 Bi-Turbo: based on the BMW F01 7 Series
M2/2
Applications:
- 2015 Alpina B5 Bi-Turbo Edition 50 Sedan/Touring: based on the BMW F10/F11 5 Series
- 2015-2016 Alpina B6 Bi-Turbo Edition 50 Coupé/Cabrio: based on the BMW F12/F13 6 Series
- 2016 Alpina B5 Bi-Turbo: based on the BMW F10/F11 5 Series
- 2016-present Alpina B6 Bi-Turbo: based on the BMW F06/F12/F13 6 Series
N63M30
The Alpina engine code is still unknown but the engine is codenamed N63M30 by BMW.
Applications:
- 2016-present Alpina B7 Bi-Turbo: based on the BMW G12 7 Series
- 2017-present Alpina B5 Bi-Turbo: based on the BMW G30/G31 5 Series
References
Source of the article : Wikipedia
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