N54 Engine

BMW N54 Engine (N54B30)

 

N54 is the first BMW engine with turbocharging and direct injection of the fuel under high-pressure, which is different from its predecessor’s outstanding combination of performance and fuel economy.

For the first time the single turbo N54 engine was introduced in 2006 along with a new coupe BMW 335i, in the future, this engine has appeared on the following models of BMW X6 3.5, BMW 535i, BMW 135i, BMW Z4 3.5 and BMW 740i. Also, it is based on the BMW 335i ALPINA company released cars ALPINA B3 Bi-turbo and ALPINA B3S Bi-turbo.

For their outstanding performance and design excellence in 2007 and 2008, this engine was awarded the nomination “Engine of the Year» (International Engine of the Year).

Initially, the engine power is 306 hp at 5800 rev / min and torque values reached 400 nm at 1300-5000 rev / min

More details about the engine’s construction you can find here

N54 Specs

Manufacturer Munich Plant
Also called BMW N54
Production 2006-present
Cylinder block alloy Aluminium
Configuration Straight-6
Valvetrain DOHC
4 valves per cylinder
Piston stroke, mm (inch) 89.6 (3.53)
Cylinder bore, mm (inch) 84 (3.3)
Compression ratio 10.2
Displacement 2979 cc (181.8 cu in)
Power output 225 kW (306 HP) at 5,800 rpm
240 kW (326 HP) at 5,800 rpm
250 kW (340 HP) at 5,900 rpm
Torque output 400 Nm (295 lb·ft) at 1,300-5,000 rpm
450 Nm (332 lb·ft) at 1,500-4,500 rpm
450 Nm (332 lb·ft) at 1,500-4,500 rpm
Redline 7,000 rpm
HP per liter 102.7
109.4
114.1
Fuel type Gasoline
ECU Siemens MSD80
Weight, kg (lbs) ~145 (320)
Fuel consumption, L/100 km (mpg)
-City
-Highway
-Combined
for E90 335i
13.0 (18.1)
6.7 (35.1)
9.1 (25.9)
Turbocharger Twin-turbocharged
2 x Mitsubishi TD03-10TK3
Oil consumption , L/1000 km
(qt. per miles)
up to 0.7
(1 qt. per 850 miles)
Recommended engine oil 5W-30
5W-40
Engine oil capacity, L (qt.) 6.5 (6.9)
Oil change interval, km (miles) 7,000-10,000
(4,500-6,000)
Normal engine operating temperature, °C (F) ~115 (240)
Engine lifespan, km (miles)
-Official information
-Real

~300 (185)
Tuning, HP
-Max HP
-No life span loss
800+
~400

bmw-n54b30-engine

This engine is also installed in:

BMW N54 engine modifications

Engine Displacement Power Torque Redline Bore Stroke Compression ratio Year
N54B30 2,979 cc (182 cu in) 225 kW (302 hp) @ 5800 400 N·m (300 lb·ft) @ 1400-5000 7000 84 mm (3.3 in) 89.6 mm (3.5 in) 10.2:1 2007-2010
240 kW (320 hp) @ 5800 450 N·m (330 lb·ft) @ 1500-4500 7000 84 mm (3.3 in) 89.6 mm (3.5 in) 10.2:1 2008-2010
250 kW (340 hp) @ 5900 450 N·m (330 lb·ft) @ 1500-4500 7000 84 mm (3.3 in) 89.6 mm (3.5 in) 10.2:1 2011-2016

N54B30 (225 kW version)

For the E90/E91/E92/E93 3-Series, the N54 engine was used in the 335i model from 2007 onwards. In the 3-series, it therefore replaced the 330i (which used the naturally aspirated N52B30 as the performance model below the M3).

This version is rated at 225 kW (302 hp) and 400 N·m. However, independent testing has resulted in estimates of 332 hp (248 kW) and 311 lb·ft/422 N·m.

The engine is installed in:

  • 2007–2010 E60 535i
  • 2007–2010 E90/E91/E92/E93 335i
  • 2007–2010 E82/E88 135i
  • 2008–2010 X6 xDrive35i
  • 2009–2016 Z4 sDrive35i

N54B30 (240 kW version)

A variant of the N54B30 with higher power and torque (but a slight reduction in low rpm torque) is used in the F01 740i and E92 335is.

The engine is installed in:

  • 2008–2012 F01 740i
  • 2010–2013 E92/E93 335is

 

N54B30TO (250 kW version)

The most powerful version of the N54 is found in the E89 Z4 sDrive 35is (as of 2016, the only application of the N54 still in production) and the 1 Series M Coupe.

The engine is installed in:

2011–2012 E82 1-series M Coupe
2011–2016 E89 Z4 sDrive35is

Source

BMW N54 vs N55

n54-vs-n55

Graph of comparing the fresh engine from BMW N55 with one twinscroll turbine and old one N54 with twin turbo.

As can be seen from the graph, any version of the 54 is ahead in terms of power (from wheels) over the new 55, which by the way is installed on a new 3-series BMW F30! WTF???? Leave your comments about this…

N54 Tuning

In our opinion, the most effective way of forcing the BMW N54 engine is chip tuning with completion of some elements of the car. With a stock automatic transmission it can be considered a maximum power of 400-420 hp.

BMW N54 tuning up to 420 hp

This program is only possible for engine with  81 MSD control unit (for cars up to 03/08 requires retrofitting on this unit, the cost of MSD 81 -is about 1500$). This ensures reliable and balanced work in all modes, and includes the following:

  • Lowering of the compression ratio to 9.4 – forged pistons with increased combustion chamber.
  • Increased cooling (on cars, where necessary) – a more powerful engine fan, an additional radiator.
  • The engine control program with increased boost pressure and the enriched mixture in maximum power mode.
  • Replacement of catalysts on the exhaust pipes of stainless steel «Pipes Kit», and agreed with her full exhaust system. (Increased exhaust gas temperatures can break the standard catalysts and therefore best to remove them in advance that there would no problem with the engine later).

supersprint

N54 Turbo tuning

  • Standard JB4/Cobb. Stage 1 firmware – up to 350 HP.
  • Want 400 HP? Well, then you need to upgrade cooling system (replace fans and install additional radiator). Also it requires large intercooler and air filter. Also purchase n54 downpipes, performance exhaust system and oil coolers. BMS JB4/Cobb Stage 2 firmware provides with 400-420 HP.
  • Want 450 HP? Install Methanol Injection Kit and your135i/335i models will reach 0-60 miles in 4.5 seconds. N54 FBO Stage 2 firmware will make it possible to cover quarter mile in 11.3 seconds. Stock version of BMW 335i N54 will cover 1/4 mile in about 13.2-13.4 seconds.

Big single turbo kit along with cylinder block head porting will provide our engine with maximum power. You will benefit from wide range of different components. You can use Alpine B3 S Biturbo head gasket in order to reduce compression ratio. The N54 engines stock internals are able to handle with 650-700 HP.

BMW N54 engine resource

Forced motor is already close to the limit of the capacity of all engine systems and any failure could cause a transition emergency operation. Therefore, when driving at a maximum power level for quite a long time, it is important to monitor the engine temperature, oil temperature and pressure. All this can lower engine’s lifespan.

In general, we can say this engine is reliable. Also, we can recommend it for those of you who wants to tune it. Don’t forget to replace spark plugs every 12 000 miles (20 thous.km) and motor oil and everything will be OK.

Want 550-750WHP from your E90? Introducing Vargas GC Turbos for N54 Powered BMW

GC Lite turbos are quite simply, THE ideal turbo upgrade for N54 powered vehicles, whether it be a direct OEM replacement for a blown unit, or a full race build looking for world class output.

 

BMW N54 335xi 425HP Pulls and Launches

 

N54 335i Turbo Install

 

Downpipes BMW 135i & 335i N54 | Installation Guide

 

400 Bhp From My BMW 335i N54 Twin Turbo From 3 Mods

References

  1. En.wikipedia.org. (2017). BMW N54. [online] Available at: https://en.wikipedia.org/wiki/BMW_N54.
  2. http://mywikimotors.com/n54b30/
  3. http://www.e90post.com/forums/showthread.php?t=38856
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