BMW N54
From Wikipedia, the free encyclopedia
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| Manufacturer | BMW, Bayerische Motoren Werke AG |
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| Production | 2006– |
| Predecessor | BMW M54 |
| Class | Straight-6 |
The N54 is a twin-turbocharged straight-6 automobile engine from BMW. It was launched in late 2006 as a high-performance option for the BMW 3-Series, first to be released along with the new 3-series E92 Coupé, to be followed closely by other existing 3-series models, then with other BMW series as well. It is BMW's first production turbocharged gasoline engine in 26 years since the 745i in 1980. The engine won the International Engine of the Year award in 2007 and 2008.
| Engine | Displacement | Power | Torque | Redline | Year |
|---|---|---|---|---|---|
| N54B30 | 3.0 L (2979 cc/181 in³) | 225 kW (306 hp) @ 5800 | 400 N·m (295 ft·lbf) @ 1300-5000 | 7000 rpm | 2006 |
| N54B30 | 3.0 L (2979 cc/181 in³) | 243 kW (326 hp) @ 5800[1] | 450 N·m (332 ft·lbf) @ 1500-4500 | 7000 rpm | 2008 |
According to BMW, the N54B30 produces 306 hp (228 kW) and 295 ft·lbf/400 N·m. Third party testing has revealed the engine is significantly underrated, producing 332 hp (248 kW) and 311 ft·lbf/422 N·m in one test. [1] The engine uses two small low-pressure turbochargers to remove turbo lag at low elevations. For this reason, the turbo pressure is only 0.4 bar, as the engineering goal was to offer the same driving feel as with naturally aspirated engines. [2] The new engine debuted at the 2006 Geneva Motor Show. Unlike the newer BMW N55 turbocharged engine, N54B30 does not use the second generation Valvetronic technology found in the N52. 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. This engine is easily modified with aftermarket tuning to produce in excess of 400 hp.[citation needed]
The engine block of the N54B30 is not similar to the older generation BMW M54B30 engine.[citation needed] The M54 is a single-piece block, while the N54 is a two-piece block with a separate bedplate, just like the N52. The M54 has a water pump housing cast into the block, while the N54 has an electric water pump, just like the N52. The M54 is a closed-deck design, while the N54 has an open deck.
A version of the N54B30 with higher power and torque but across a narrower peak torque band was introduced in the F01 2009 BMW 740i.[1]
Applications:
- 2006– E90 Sedan 335i
- 2006– E91 Touring 335i
- 2006– E92 Coupé 335i
- 2007– E93 Convertible 335i
- 2008– E60 Sedan 535i
- 2008– E61 Touring 535i
- 2008– E82 Coupé 135i
- 2008– E88 Convertible 135i
- 2009– F01 Sedan 740i
- 2009– BMW X6 xDrive35i
- 2010– BMW Z4 sDrive35i
[edit] References
- ^ a b Paul Tan (July 5, 2008). "New BMW 7-Series F01 Specifications and Photos". Paul Tan's Automotive News. http://paultan.org/archives/2008/07/05/new-bmw-7-series-f01-specifications-and-photos/. Retrieved on July 8 2008.
