BMW N63

BMW N63 V8 engine

The BMW's N63 twin-turbo V8 DOHC piston engine which replaced the N62 (naturally aspirated) and was produced from 2008-present. It was released in 2008 BMW X6 xDrive50i, and later the F01 BMW 750i. The location of the intake and exhaust ports are reversed in comparison with a traditional V8. The BMW Motorsport division version of this engine, called S63, debuted in the X5M and X6M and later appeared in the M5 and M6. Alpina also uses a variant of this engine in 2011 and B5 Alpina B7.

Manufacturer	BMW, Bayerische Motoren Werke AG
Production	2008 – present
Predecessor	BMW N62
Configuration	V8

Design

The exhaust manifolds and turbochargers are located between the banks of cylinders (i.e. on the "inside" of the V8) and the intake manifolds are located on the outside of the engine; this is the opposite of the traditional manifold arrangement for a V8. This new design creates a more compact engine package and reduces the width of the assembled engine, also decreasing the distance from the exhaust manifolds to the turbochargers. The engine uses air-to-water intercoolers, which are more efficient and provide a shorter air path than standard air-to-air intercoolers.
Similar to the N54B30, the original N63B44 and S63 do not use the second generation Valvetronic technology found in other current engines. The principal advantage of Valvetronic is the reduction of intake vacuum, which is not an issue in the pressurized intake found in a turbo-charged engine. Valvetronic was added to updated variants of the engine for the 2012 BMW M5/M6 (S63TU) and then for the 2013 BMW 750i and 650i Gran Coupe.
In terms of performance, the N63 is a close match to the N73 V12 engine found in the previous-generation E65 760i/Li, so the V12 engine had to be redesigned with twin turbochargers for the F01 760i/Li in order to maintain its status as the flagship of the range.

Engine	Displacement (cc)	Power @rpm	Torque @rpm	Redline (rpm)	Year
N63B44	4,395 cc (268 cu in)	408 PS (300 kW; 402 hp)@5500-6400	600 Nm (440 lbft)@1750-4500	7000	2008-
N63B44TU	4,395 cc (268 cu in)	445 PS (327 kW; 439 hp)@5500-6400	649 Nm (479 lbft)@1750-4500	7000	2012-
S63B44	4,395 cc (268 cu in)	555 PS (408 kW; 547 hp)@6000	680 Nm (500 lbft)@1500-5650	7000	2009-
S63B44TU	4,395 cc (268 cu in)	560 PS (410 kW; 550 hp)@5750-7000	680 Nm (500 lbft)@1500-5750	7200	2011-

N63B44

Applications:

• 2008– E71 X6 xDrive50i
• 2009– F01/F02 750i/750Li sDrive/xDrive
• 2010– F07 550i GT sDrive/xDrive
• 2011– F10/F11 550i sDrive/xDrive
• 2011– E70 X5 xDrive50i
• 2012– F12/F13 650i sDrive/xDrive
• 2013– F01/F02 750i/750Li sDrive/xDrive w/ Valvetronic
• 2013– F12/F13 650i Gran Coupe w/ Valvetronic

S63

The S63 is BMW's Motorsport division version of the N63, which is debuted in the BMW X6M. 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.

S63B44

Applications:

• 2010– E70 X5 M
• 2010– E71 X6 M
• 2011 Wiesmann GT MF5

S63B44TU

A technical update to the S63, known as the S63B44TU, 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 to use valvetronic.

Applications:

• 2011–present F10 M5
• 2012–present F12/13 M6
• 2013–present F06 M6 Gran Coupe

Alpina

Alpina uses a variant of the N63 engine that makes 25% more power than the base engine. Compared to the S63, Alpina's variant makes lower horsepower but more torque.
For the 2013 model year, it received Valvetronic like all other N63 engines. Compared to BMW M's version of the 4.4L twin-turbo engine (such as found in the F10 BMW M5), Alpina's engine has 20 hp less but more maximum torque which is also available at a lower RPM.

• Touring ALPINA B5 Bi-Turbo Sedan /: based on the BMW 5 Series F10/F11 - with a 4.4 L V8 Bi-Turbo 507 hp (373 kW 500 hp) / 700 Nm (516 lbft)
• ALPINA B7 Bi-Turbo based on the BMW 7 Series F01 - with a 4.4 L V8 Bi-Turbo 507 hp (373 kW 500 hp) / 700 Nm (516 lbft)

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Last updated on 1 August 2013 at 06:50.