Direct injectors are prone to carbon buildup and are subjected to a continuously brutal environment inside the combustion chamber of the engine. Fuel injectors in the BMW N55 engine are also prone to sticking open. This is a very serious condition where the injector continues to spray fuel into the cylinder.
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How much HP can N55 handle?
The N55 can handle around 550whp and 550wtq on the stock engine block and internals.
Is the BMW N55 a good engine?
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.
Why is the N55 so good?
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.
How much boost can N55 handle?
BMW’s N55 engine is capable of excellent performance straight out of the factory. With a reliable twin-scroll turbo, the N55 is capable of making up to roughly 25-26psi. However, for reliability and longevity reasons, we recommend limiting boost to about 20-21psi.
How long will N55 engine last?
The BMW N55 motor should have no problem lasting over 150,000 miles, and some owners report getting over 250,000 miles out of their engines.
Are N55 turbos reliable?
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.
Does N55 burning oil?
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 Do not quote me on this, but I believe N55 burns about a quart per 10,000 miles.
Which is better N55 or B58?
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 the N55 have 2 turbos?
The BMW N55 TwinPower turbo is a single Turbo engine with two separate exhaust runners powering the hot side of the turbo.
How long do N55 injectors last?
The injectors in the N55’s usually last well over 200K miles.
Is N55 more reliable than N54?
Of course the N55 is more reliable, as stated they built it for primarily that reason. Especially if you’re not into tuning then I see no reason to seek out an N54. Just take a good look at the car you want to buy; it isn’t hard to tell if a car was well maintained or driven into the ground.
How can I make my N55 faster?
- ECU Tuning. The engine control unit (ECU) is the brain of every modern engine.
- Cat-Back Exhaust.
- Downpipe.
- Intake.
- Intercooler.
- Charge Pipes.
- Oil Cooler.
- Oil Cooler Thermostat.
How much HP does a Stage 2 BMW N55 have?
Expected horsepower for the N55 MHD stage 2 tune comes in around 310-340whp.
What size turbo does the N55 have?
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).
Does N55 have timing belt or chain?
N55 did not have the same issue as the N20 engine. The timing chain on the n55 will last the life of the engine.
Does N55 have rod bearing issues?
The Problem Many BMW drivers with N55 engines have experienced engine failures and issues related to bearings inside the engine. When this occurs you’re often stuck looking at complete engine replacements and repairs totaling over $10,000 to fix the issue and repair all of the damages caused.
How much HP does N55 make?
368 kW (493 hp) version.
Is the N55 good for tuning?
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 hot does N55 get?
My N55 keeps oil temperatures around 240F mark during 4/5 trips. However, other times oil temp gauge sits at 210F (big middle mark, half way between 160F and 250F) while cruising. Dealer says its “normal” and both behaviors are within safe operating range.
How often should you change oil N55?
N55 oil changes should be done every 5,000-8,000 miles. Or once a year – whichever comes first.
How often should you change spark plugs N55?
In most modern BMWs, manufactured after 2010 with the N20 or N55 engines, it is required to change spark plugs every 60,000 miles. For BMWs with V8, V10, or N54 or N63 engines, 37000 miles are the threshold before getting new spark plugs.
Is N55 forged?
Starting from the block and rotating assembly, BMW gave the N55 a forged crankshaft, forged connecting rods and newer piston rings.
Is the N55 in the M2 different?
Differences from the N55 engine found in the standard M2, the S55 includes a closed-deck engine block, lightweight crankshaft, different crankshaft bearings, strengthened pistons/rods, different springs/valve material, twin turbos, twin fuel pumps, active exhaust, revised cooling system and intercoolers.
What replaced the N55?
BMW’s latest engine release is designated as the B58 engine in the 6-cylinder version. The new B-Series platform is designed to work in 3-, 4- and 6-cylinder variants. The B58 engine will replace the N55 engine throughout their vehicle lineup.