What BMWs came with N55?

  • 2009-2017: 535i.
  • 2010-2013: 335i.
  • 2010-2013: 135i.
  • 2010-2017: X3 xDrive35i.
  • 2011-2013: X5 xDrive 35i.
  • 2011-2015: 335i.
  • 2011-2014: X6 xDrive 35i.
  • 2012-2015: X1 xDrive35i.

How much HP does the N55 have?

N55 Reliability Despite the many misconceptions that BMW’s as a whole are unreliable, the BMW N55 is actually a fairly reliable engine. The four most common problems with the N55 are, in no specific order, the valve cover and gasket, water pump, oil filter housing gasket, and VANOS solenoids.

Is the N55 fast?

From the factory, according to BMW, the N55 Inline-6, twin scroll single turbo motor produces 306 HP/ and 295Ft-Lbs.

How long do N55 turbos last?

The N55 twin-scroll turbo offers slightly faster turbo spool and delivers peak torque 100 RPM’s sooner than the N54; a characteristic that is not noticeable as each turbo set up spools quickly and delivers impressive torque through-out the low end and midrange.

Is N55 twin turbo?

N55 Turbo Longevity at 20+ PSI In general, more boost will reduce the lifespan of the N55 stock turbo. However, it is possible for N55 turbos to last 50,000+ miles at 23psi, for example. On the other hand, the stock turbo may decide to let go much sooner even at 20psi.

Which is better N55 or B58?

The main difference between N54 and N55 is the type of turbocharger used in each engine. Its N54 engine uses twin turbos, while the N55 uses a single turbo with a twin-scroll exhaust.

Is the N55 good for tuning?

As you can see, from very early on the B58 has big gains over the N55 which it holds right through the rev range. As you can see, the B58 has a very similar boost curve, but makes around 4PSI more than the N55 across virtually the whole rev range.

Does N55 burning oil?

Overall, BMW’s N55 is a tuner-friendly engine capable of making, on the stock turbo, plenty of power to satisfy a majority of enthusiasts, all while remaining reliable and driveable in all conditions.

How can I make my N55 faster?

  1. ECU Tuning. The engine control unit (ECU) is the brain of every modern engine.
  2. Cat-Back Exhaust.
  3. Downpipe.
  4. Intake.
  5. Intercooler.
  6. Charge Pipes.
  7. Oil Cooler.
  8. Oil Cooler Thermostat.

Why is the N55 more reliable than N54?

N55s do burn oil but to my knowledge. However, its not nearly that much. Do not quote me on this, but I believe N55 burns about a quart per 10,000 miles.

How strong is the N55 engine?

There were less N55 models produced vs the N54 so you’re less likely to see as many negative posts. Most of the “issues” the early N54’s had were resolved with revised part numbers like the HPFP’s and injectors. The N55 learned from the N54’s mistakes.

What engine is better N54 or N55?

BMW N55 Engine Strength Summary The N55 is a solid all-around engine that offers respectable strength from the factory. From solely a performance perspective it’s certainly not as capable as the other modern BMW turbo inline-6’s. However, the N55 can still handle about 550-600whp with a proper setup.

What year did 335i get N55?

N54 N55 tuning potential While both engines give good gains, the N54 will always make slightly more power simply because it has two turbos and that means it’s easier for it to generate more power.

Are BMW turbos reliable?

Model year 2011 335i’s moved on from the twin turbo N54 engine to the single turbo N55. The N55 moved from piezo injectors to solenoid style injectors. This was a huge reliability upgrade over the problematic piezo injectors on the N54. However, the N55 uses the same fuel pump as the N54.

How much HP does a tune add to a 335i?

Consumer Reports’ reliability surveys have also found that manufacturers with a lot of experience building turbocharged engines—Audi, BMW, Porsche—tend to have more reliable powertrains.

How do I know if I have a N54 or N55?

Expect gains of approximately 50HP when upgrading the downpipes and flicking the switch to Stage 2 tuning. The difference in power gains from a catless downpipe compared to a high flow catted downpipe are only a few horsepower.

Is the N55 turbo reliable?

Probably the best way to tell without looking under the hood… is IF it has a DCT it is an N55. IF its an auto it is an N54. IF its a 6MT… you’ll have to look under the hood.

What turbo does the N55 have?

Both the N54 and N55 turbochargers are very reliable. The issue with the N55s is that they have weak internals. Make sure that the VANOS recall has been performed and don’t go overboard with tunes; N55 rod bolts are known stretch.

What size is N55 turbo?

The Business Case for an N55 Turbo Upgrade Their Stage 1 upgrade uses the stock turbo housing which is a Borg Warner B03 Twin Scroll.

Is N55 Motor single turbo?

The N55 engine had a journal bearing Borg Warner ‘B03’ turbocharger which had a custom version of the smallest Borg Warner EFR billet compressor wheel (62 mm) and custom inducer sizing. For the N55 engine, maximum boost pressure is understood to be around 0.61 bar (8.8 psi).

What is the most reliable BMW engine?

  • BMW B58 Engine.
  • BMW M20 Engine.
  • BMW M50 Engine.
  • BMW S62 Engine.
  • BMW N52 Engine.
  • BMW M54 Engine.

What engine is after the N55?

BMW’s new variation on the engine, labeled the N55, is based on the same basic engine block and valve system but only sports a single turbocharger. It is the world’s first engine to combine turbocharging, direct fuel injection and fully variable Valvetronic valve management developed by BMW.

Is N55 a B58?

In 2010, the 335i received the updated N55 engine followed by the B58 in 2016, however, the model was rebranded to the 340i. Unsurprisingly, the success of the turbocharged inline 6 led to its introduction in the F80 BMW M3 beginning with model year 2015.

Is the N55 closed-deck?

The BMW B58 is a turbocharged straight-six engine, which began production in 2015. The B58 replaced the N55 and was launched in the F30 340i.

Is N55 direct injection?

The N55 engine family: Both engines are of OPEN DECK design, meaning that there is a space between the engine block and cylinders sleeves to cool the engine.

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