BMW N55HP engine

This engine is a modification of the N55B30, it began production in 2009 and is still in production today. The main material of the cylinder block in it is aluminum. It has an injector as a power system. The engine is characterized by inline and it has 6 functioning cylinders. Each cylinder has 4 valves. The stroke of the piston here is equal to 89.6 millimeters, and the diameter of one cylinder reaches a value of 84 millimeters. The compression ratio in this particular case is 10.2. Its volume of 3.0 liters allows you to cope with all modern car requirements. At 5800-6000 rpm, the power here ranges from 306 to 360 horsepower. And here at 6500 rpm it rises to 370 horsepower.
Maximum torque in this case at 1200-5000 rpm is equal to 400 N*m. At 1300-4500 rpm it will be at 450 N*m. At 1350-5250 rpm, its value will be 465, as well as at 1450-5550 rpm. As the main fuel, it is most correct to use 95 grade gasoline. There is also an ecological norm Euro 5. This engine weighs about 135 kilograms.

Fuel consumption in it on the highway will be 6.3 liters per 100 kilometers, in mixed territory this figure will increase to 8.2, and in the city and at all will be 11.6 liters per 100 kilometers. Oil is usually used in the amount of less than 700 grams per 1000 kilometers.

For the engine is perfectly suitable oil 5W-40 or 5W-30. It usually contains about 6.5 liters of oil. Replacement is best done after every 10 thousand kilometers. The engine has a temperature of approximately 110 degrees. In the case of using tuning in the potential to raise the power to 400 and more horsepower.

N55HP engine specifications

Advantages

This generation was originally required to replace its predecessors. The cylinder block here remained the same, it is made of aluminum, but with the additions of cast iron liners. In addition, oil injectors and a lightweight crankshaft were also used here. The connecting rods and pistons changed slightly in this case. The block head got its updates too, the developers finalized the system that changed the phases of gas distribution on both shafts. They also added a height editing system on the valve lift. The intake and exhaust systems have changed noticeably too.

Two turbocharged compressors were no longer used, the manufacturers decided to put only one, but equipped it with twinscroll functions. It provided stable torque after 1200 rpm. Supercharging pressure here amounted to 0.65 bar. There was a new system for controlling the engine from the famous firm Bosch. Cars with the index 40i and 35i received such a power unit. And it also became a basic detail in the creation of a sports engine S55. It was made by the department for sports cars. Drivers rate this unit as almost excellent.

Disadvantages

This engine consumes a lot of oil. Usually the main problem with this issue is the valve that vents the crankcase gases. Ignition is sometimes missed. This turns out to be due to contaminated hydraulic compensators. Therefore, you should always fill a good suitable oil.

The engine vibrates. This effect is achieved when the injectors are broken, usually their shelf life is from 80 to 100 thousand kilometers. Further it is necessary to check this part and buy new injectors, it will help to solve the problem.

Usually, engines of this type have a lot of problems with the fuel injector. It can break down for no reason, but often just because drivers are trying to save money. To avoid this, it’s best to fill up with quality gasoline and the right oil.

For tuning, this unit has a small reserve, it is characterized by its power, reliability and good performance. Therefore, this purchase will justify itself one hundred percent.

Modifications

•        The M0 was produced from 2009 to the present day. It is the base engine and has a power of 306 horsepower at 5800 rpm. Maximum torque here is equal to 400 N*m at 1200-5000 rpm. This unit is produced for cars with the index 35i.
•        N55 standard was produced from 2010 until now. Its power is equal to 320 horsepower at 5800-6000 rpm. But the maximum torque here is 450 N*m at 1300-45000 rpm. Here the developers have improved cooling and changed the firmware. It was put on cars with the index 40i and 35i.
•        The O0 was launched in 2011 and is still in production today. Its power reaches a figure of 326 horsepower at 5800-6000 rpm. And the maximum torque here will be 450 N*m at 1300-4500 rpm. It is installed on cars with an index 35i.
•        The aforementioned HP was produced from 2011 until now. Its power output is 340 horsepower at 5800-6000 rpm and maximum torque is 450-500 N*m with Overboost at 1300-4500 rpm. It is also used on cars with index 35i
•        The T0 began production not too long ago, in 2015, and still continues to delight motorists. It has a power output of 360 horsepower at 5800-6000 rpm. The maximum torque here is 465 N*m at 1350-5250 rpm. It is installed on cars with the index 40i.
•        The O0 new one too was produced from 2015 till today. Here the power is 370 horsepower at 6500 rpm and the maximum torque goes up to 465-500 N*m with Overboost at 1400-5550 rpm. Used on the M2 auto.

Chip Tuning

In order to properly tune and chip this machine, you will need to purchase downpipes. Thanks to this part it will be possible to achieve a power of more than 380 horsepower. On the usual firmware engine can raise the power of over 360 horsepower. Cold intake will give the opportunity in a pile with a full sports exhaust to get again more than 380 horsepower. All these changes will lead to the fact that the BMW will pass 402 meters somewhere in 12 seconds. But a normal car from this developer will go in just 13.5 seconds on average. Therefore, the difference shows how effective Chip tuning is on this model.

This engine is installed on the following models:

BMW 6-Series (F12)