The BMW S55 engine is a highly sophisticated, high-performance unit. Its cylinder bores feature twin-wire arc-sprayed coating, which is much lighter than conventional cylinder liners. Its pistons are also made of Grafal-coated aluminum alloy to reduce friction and improve combustion. BMW engineers also made use of special heat-management systems to keep the engine cool. This engine also features a magnesium oil sump and a special cover to reduce weight and heat.
Unlike the N55 engine, the S55 engine features a more linear power band, with peak torque being available from 1850 to 5500 rpm. This makes it possible for the stock S55 engine to deliver more power than ever. A stock S55 engine is rated for 425 horsepower and 406 lb-ft of torque, making it the most powerful BMW engine to date. With BMW tuning, it is possible to boost the output to as high as 1,150 horsepower.
The S55 engine shares many characteristics with the N55, such as a forged crank and rods. These two features help increase the strength and durability of the engine, and result in a more powerful and beefier engine. The S55 also has a water intercooler mounted on the motor. Other features of the S55 include an aluminum cylinder head and magnesium oil sump.
Another significant improvement over the N55 engine is the use of a closed-deck design. This allows the engine to have a higher cylinder pressure, which is a key part of engine performance. The S55 also features a twin-turbo configuration for optimum torque output. Wheel-spinning torque is available from 1850 rpm and builds linearly through the rev range. Moreover, the S55 employs dual-VANOS valve lift technology.
Another upgrade is a new crank hub. This component allows for better fuel atomization, which is essential for high-performance engines. It has a high degree of reliability, but it may occasionally experience carbon build-up and a failed high-pressure fuel pump. The crank hub also often spun, which was a major problem with the S55 engine. However, these problems have been addressed by the manufacturer and are not widespread.
The S55 engine uses a magnesium sump instead of a traditional one. This allows for reduced weight without compromising performance, and it also helps with oiling under hard cornering. Nevertheless, the engine’s other features remain the same: double-VANOS, direct injection and Valvetronic throttle plate. Moreover, the S55 comes with an oil cooler instead of a catch can.
In addition, the S55 engine uses a new scavenger pump. The additional pump collects oil from the corners of the oil pan, and this prevents the engine from getting starved during aggressive cornering. The S55 engine is an excellent choice for high-performance drivers and is a popular option in many BMW models.
BMW M TwinPower Turbo technology
The BMW M TwinPower Turbo technology for the S55 engine combines two rapid-response monoscroll turbochargers and a High Precision Direct Injection (HPDI) system for maximum power. These systems work together to reduce fuel consumption and emissions, and maximize torque across a wide rpm range. In addition, they also help to reduce weight.
The BMW S55 engine is the high-performance version of the N55 engine, which was introduced on the F07 5 Series Gran Turismo in 2009. This engine was the first mass-produced engine to feature twin-scroll turbochargers. The S55 engine was later added to the F80 M3 and F82 M4, and eventually the F87 M2 Competition/CS. While the two engines share some features, they are very different in terms of performance and efficiency.
The S55 engine is a unique combination of components. Unlike the M TwinPower Turbo engine, it does not use a modified Twin-Power Turbo system. Its head and block are made from lightweight aluminum and its oil pan is made of magnesium. The S55 engine has a maximum speed of 7600 rpm.
BMW’s latest M models feature TwinPower Turbo technology that incorporates a divided inlet turbine and an exhaust manifold. The result is a smooth power delivery at all engine speeds. This is achieved by maximizing pulse energy fed to the turbocharger wheel. However, the TwinPower Turbo designation has generated a lot of confusion, as it is not the same as a true twin turbo. Rather, it is a twin-scroll single turbocharger.
The S55 engine’s longer stroke also helps produce excellent low-end torque. Peak torque is available at less than 2,000 rpm, while the peak horsepower plateaus at around 7,000 rpm. The S55 engine is based on the N55 engine, which was first used in the BMW 5 Series Gran Turismo in 2009. The S55 engine has the same displacement as the N55, and the same compression ratio.
In addition to the new TwinPower Turbo Technology, BMW Motorsport also revealed technical specs for the new M2 CS. This entry-level customer car will succeed the M235i and M240i. The M2 CS features a 2,979 cc S55 M inline-six engine with BMW M TwinPower Turbo Technology. The engine will produce between 280 and 365 horsepower and a maximum torque of 406 pound-ft.
BMW’s S55 engine
BMW’s S55 engine is a six-cylinder inline-six turbocharged petrol engine that’s designed for performance vehicles. It features M TwinPower Technology, including two mono-scroll turbochargers and high-precision direct injection. It also incorporates Valvetronic variable valve timing (VVT) and double VANOS variable camshaft timing for optimal power delivery. The S55’s high-rev nature makes it responsive and linear across a wide engine speed range.
The S55 is a beefier version of the N55 engine, with a bigger turbocharger and a longer stroke. Peak torque is available from below 2,000 rpm, while peak horsepower remains flat until around 7,000 rpm. The S55 engine shares its structure with the BMW N55 engine, which was first introduced in the 2009 BMW 5 Series Gran Turismo. The N55 engine uses the same compression ratio as the S55 engine, and both are designed for low CO2 emissions.
The BMW S55 engine features twin-wire arc-sprayed coatings on the cylinder bores, which reduce friction and increase efficiency. It also features Grafal-coated aluminum alloy pistons. The crankcase is designed with ventilation holes on the bottom to regulate heat and pressure. The S55 also has a low-weight magnesium oil sump. The oil sump is protected with a unique cover to keep it cool and avoid overheating.
The S55 engine is also highly durable, as it has a high-contrast crankshaft. This helps the engine achieve maximum torque and power. It can deliver torque from 1850 rpm to 5500 rpm, with its optimal performance range between 5500 rpm and 7300 rpm. At 7600 rpm, the S55 has a maximum speed of 275-360 hp.
BMW’s S55 engine is also capable of handling impressive power levels. The BMW M2 Competition uses this engine in its race car. It can reach nearly double its factory output, and one video released by HC-Performance shows it at 850 horsepower. Its 0-to-60 mph (300 kph) time in the same video is quite impressive.
The S55 engine has excellent low-end grunt. Most of the torque in the M4’s power band is available at 1,800 rpm. The M4’s redline is 7,600 rpm, and the car can sprint from 0-60 in less than four seconds.