BMW S55

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BMW.svg BMW
S55B30

S55B30
S55
Production period: since 2014
Manufacturer: BMW.svg BMW
Working principle: Otto
Motor design: R6
Drilling: 84 mm
Hub: 89.6 mm
Displacement: 2979 cm 3
Mixture preparation: Direct injection
Engine charging: Exhaust gas turbocharger
Power: 317-368 kW
Max. Torque: 550-600 Nm
Previous model: not a direct one
Successor: BMW S58

The S55 is an in- line six-cylinder engine with twin-turbo charging from the automobile manufacturer BMW , which is based on the BMW N55 . The biturbo was introduced in the new M3 (F80) and M4 (F82) in mid-2014 . With the end of the last BMW M3 generation, the chapter on high-performance naturally aspirated engines at BMW was closed. This predecessor M3 had a 309 kW (420 hp) high-revving V8 engine with a displacement of four liters ( BMW S65 ).

The new six-cylinder is superior to it in terms of torque and in non-full load situations in terms of consumption; a maximum of 5% in the life of an M3 takes place in the full load range. Two to three liters less gasoline should be used in normal road traffic. The graphic in the web link also shows a comparison of some sizes.

The S55 has the same dimensions of bore and stroke as well as an aluminum crankcase as the N55; however, the latter is designed in a closed-deck design in order to achieve greater rigidity and to be able to work with higher combustion pressures; unlike its basic model, it has a water intercooler in addition to the two turbochargers , which is attached to the top of the engine.

In addition to the aluminum crankcase, the following three features also help to save weight: Instead of inserts, the cylinder liners are arc-sprayed ; the cylinder head is also made of aluminum; Magnesium is used for the oil pan . The crankshaft is made of steel, forged and hardened. The final speed is 7600 min −1 .

The two overhead camshafts are controlled by VANOS , which now enables faster adjustments, the valves by Valvetronic III. As with the N55, the exhaust valves are sodium-filled.

The most powerful version with 368 kW (500 PS) in the BMW M4 GTS (2015) uses water injection .

Since 2016 the BMW F80 and BMW F82 have been available with the additional Competition Package , which increases the output of the S55 to 331 kW (450 PS).

The BMW M2 "Competition" Coupé, available since September 2018, is also equipped with the S55 engine. Here it has an output of 302 kW (405 hp) and delivers a maximum torque of 550 Nm (406 lbf ft). BMW also uses the S55 in order to be able to comply with stricter emission limits with the M2.

Data

Engine type Displacement Bore × stroke Power at 1 / min Torque at 1 / min Maximum speed compression year
S55B30 2979 cc 84 mm × 89.6 mm 317 kW (431 hp) at 5500-7300 550 Nm at 1850-5500 7600 min −1 10.2: 1 since 2014
S55B30 331 kW (450 hp) at 7000 550 Nm at 2350-5500 from 2016
S55B30 338 kW (460 hp) at 6250 600 Nm at 4000-5380 from 2017
S55B30 368 kW (500 hp) at 6250 600 Nm at 4000-5500 2016/2017

Individual evidence

  1. ↑ a b c Technical data for the BMW M4 Convertible. (PDF; 364 kB) Retrieved October 6, 2017 .
  2. ↑ a b c AutoBild.de from August 22, 2018, The six cylinder of M GmbH , accessed on November 16, 2018.
  3. ↑ auto-motor-und-sport.de of November 26, 2013, Make four out of three , accessed on November 17, 2018.
  4. ↑ a b c Bimmertoday from April 23, 2014, conversation with the head of engine development at M GmbH Jürgen Poggel about details of the S55 , accessed on November 16, 2018.
  5. ↑ a b c d The S55 at AustralianCar.Reviews (English), accessed on November 17, 2018.
  6. ↑ The N55 illustrated at AustralianCar.Reviews (English), accessed on November 23, 2018.
  7. ↑ a b Technical data BMW M4 GTS. (PDF; 141 kB) Retrieved October 6, 2017 .
  8. ↑ Chris Perkins: How Emissions Regulations Forced BMW to Give the M2 Competition 40 More Horsepower , April 19, 2018, accessed on November 23, 2018
  9. ↑ Technical data BMW M4 CS. (PDF; 166 kB) Retrieved October 6, 2017 .

Web links

Timeline of BMW gasoline engines for passenger cars since 1961
Number of cylinders Conception 1960s 1970s 1980s 1990s 2000s 2010s
0 1 2 3 4th 5 6th 7th 8th 9 0 1 2 3 4th 5 6th 7th 8th 9 0 1 2 3 4th 5 6th 7th 8th 9 0 1 2 3 4th 5 6th 7th 8th 9 0 1 2 3 4th 5 6th 7th 8th 9 0 1 2 3 4th 5 6th 7th 8th
3 1.5 l B38
4th (1.5–2.0 l) M10
M40
M42
M43
M44
N40
N42
N45
N46
N43
N13
N20
B48
High performance motor S14
6th Small six-cylinder (2.0-3.0 l) M20
M50
M52
M54
Large six-cylinder (2.5-3.5 l) M30
N52
N53
N54
N55
B58
High performance motor M88
S38
S50
S52
S54
S55
8th 3.0-4.4 l M60
M62
N62
N63
High performance motor S62
S63
S65
10 High performance motor S85
12 5.0-6.6 l M70
M73
N73
N74
High performance motor S70
Number of cylinders Conception 0 1 2 3 4th 5 6th 7th 8th 9 0 1 2 3 4th 5 6th 7th 8th 9 0 1 2 3 4th 5 6th 7th 8th 9 0 1 2 3 4th 5 6th 7th 8th 9 0 1 2 3 4th 5 6th 7th 8th 9 0 1 2 3 4th 5 6th 7th 8th
1960s 1970s 1980s 1990s 2000s 2010s