Monica
💫 Summary
This video provides a comparison between the BMW N55 and B58 engines, highlighting their similarities and differences, including power output, cooling systems, turbochargers, and design elements. The B58 engine is shown to be more advanced, offering higher power and lower emissions compared to the N55.
✨ Highlights📊 Transcript
The B58 engine has a relocated oil filter assembly and a larger intake resonator compared to the N55 engine.
02:30
The oil filter assembly in the B58 engine is located at the front, unlike the N55 engine.
The B58 engine takes into account the reliability issues of the N55 engine by relocating the oil filter assembly.
The intake resonator in the B58 engine is larger and almost resembles a second air filter box.
Both engines have different configurations in the engine bay, with variations in intake and muffler box layouts.
The N55 and B58 engines have differences in design, power output, and cooling systems.
05:05
Both engines have a 3.0-liter displacement.
The N55 complies with Euro 5 emission regulations, while the B58 complies with Euro 6.
The lowest power version of the N55 produces 306 horsepower, while the lowest power version of the B58 produces 320 horsepower.
The highest power version of the N55 produces 370 horsepower, while the highest power version of the B58 produces 382 horsepower.
The N55 has an open deck engine block design, while the B58 has a closed deck design.
The B58 has a more heavy-duty cooling system, including a liquid-cooled intercooler, second coolant expansion tank, and additional electric coolant pump.
The B58 engine has an additional electric motor for coolant circulation after shutdown, larger turbocharger, higher fuel preparation pressure, and more advanced cylinder wall protection compared to the N55 engine.
07:38
B58 engine has an additional electric motor for coolant circulation after shutdown.
B58 turbocharger is larger, producing 20% more boost than the N55.
B58 has higher fuel preparation pressure and features the HE DV6 standard.
B58 has a forged steel crankshaft and toughened internals for start-stop operation.
B58 has more advanced cylinder wall protection using electric arc wiring spray lts.
B58 does not have a power steering pump, unlike the N55.
B58 has a gas particulate filter system, while N55 does not.
Highest power N55 has a dedicated oil cooler radiator, which is not found on the highest power B58.
B58 has a slightly larger displacement of 299 cubic centimeters compared to 2979 cubic centimeters of N55.
00:02[Music]
00:13hi guys
00:14today i would like to briefly compare
00:16two bmw m performance engines the
00:19venerable n55 and the superb b58 and
00:23clarify how similar and how different
00:25they are to each other the n55 was
00:27introduced in 2009 and was in production
00:30for around 10 years
00:32consequently it was found in almost
00:34every bmw series in various power
00:36outputs
00:37the b-58 was introduced in 2016 and is
00:41the successor to the n55 engine it is
00:44similarly found in almost all the bmw
00:46series cars
00:47please watch my b58 vs b58tu video for a
00:51rough list of the cars that feature the
00:53b58 the n55 and b58 have some
00:57similarities both are three liter
00:59straight six engines developed by bmw
01:02both have won various awards
01:04both have three distinct technical
01:06versions in the case of the n55 this is
01:08the n55 b30 m0 the n55b300
01:13and the
01:15n55b30t0 and in the case of the b58 this
01:18is the b58b30 m0 the b58b30 m1 and the
01:24b58b301 hence both engine types have
01:26versions with power outputs between 300
01:29horsepower and 400 horsepower
01:32both feature a combination of exhaust
01:34turbocharger valvetronic and direct fuel
01:37injection making both engines tbdi
01:39engines tvdi stands for turbo
01:42valvetronic direct injection
01:44both feature a single twin scroll
01:46turbocharger installed on the right hand
01:48side of the engine
01:49both feature a single close to engine
01:52catalytic converter both feature similar
01:55lightweight camshafts both feature four
01:57valves per cylinder so the two engines
01:59are broadly similar under the bonnet
02:02they are visually different whilst both
02:04engines are installed longitudinally
02:06with the hot turbocharger fitted to the
02:08right hand side after looking forward
02:10the n55s intake and muffler box are on
02:13the left hand side away from the
02:14turbocharger whereas the b58 intake and
02:17muffler box are on the right hand side
02:19near to the turbocharger in contrast the
02:22coolant expansion tank is on the right
02:24hand side of the n55 on the same side as
02:26the turbocharger whereas the coolant
02:28expansion tanks are on the left hand
02:30side of the b58 engine bay away from the
02:33turbo in what could be characterized as
02:35the cooler side of the engine bay we'll
02:37return to coolant differences later in
02:39the video a prominent component when
02:40looking at an n55 engine bay is the oil
02:43filter assembly at the front the oil
02:45filter assembly is in a completely new
02:47location on the b58 please watch my b-58
02:50under the bonnet guide video for details
02:52of its location it's clear that the b-58
02:55design takes into account the
02:56reliability issues of the n55 which is
02:59likely why this oil filter assembly has
03:01been relocated on the b-58 due to the
03:04known issue of oil leaking on the n55
03:06serpentine belt just to mention briefly
03:08a prominent component when looking at a
03:10b-58 which is the intake resonator this
03:13resonator is even larger in the b-58 tu
03:16appearing almost as a second air filter
03:19box note that in the case of both
03:21engines the layout in the engine bay can
03:23vary in the case of the b58 there are
03:25the first generation b-58 and the second
03:27generation b-58 also known as the b-58
03:30tu in the case of the n55 there are
03:33different intake and muffler box
03:34configurations but i'll be using
03:36examples from the m2 for illustration so
03:39as mentioned previously each engine type
03:41has three distinct technical versions
03:43but for simplicity in this video we'll
03:45compare two from each so we'll include
03:47the original entry into service versions
03:49and the highest power versions let's
03:51have a quick look at the engine
03:53designations please watch my s58 vs b58
03:56video for a comprehensive description of
03:58what each letter in the designations
04:00mean this video will cover the
04:01designations briefly i will skip the
04:04first letter and return to it in a
04:05moment the second letter five means it
04:08is a six cylinder inline engine the
04:11third letter five in the case of the n55
04:14means combination of exhaust
04:16turbocharger valvetronic and direct fuel
04:18injection and eight in the case of the
04:21b58 means tvti engine however the
04:24combination of exhaust turbocharger
04:26valvetronic and direct fuel injection is
04:29also known as turbo valvetronic direct
04:31injection tbdi so this means both the
04:33n55 and b58 are tvdi engines in other
04:38words if the n55 were launched today it
04:40would also most likely be designated n58
04:43based on bmw's current naming convention
04:46so going back to the first letter both n
04:49and b mean the developers bmw but the
04:52letter has changed to demonstrate a move
04:54towards a modular engine design it is a
04:57way to signify that the b generation
04:59engines are in a different class
05:00compared to the end generation engines
05:03even if they share similar concepts such
05:05as the tvdi configuration the fourth
05:08letter b
05:09means a petrol engine with longitudinal
05:11installation the next two numbers are
05:13the engine displacement in both cases
05:16they are 3.0 liter engines
05:18the next letter is the performance class
05:20where m means medium o means upper and t
05:24means top
05:25the last number is the redesign relevant
05:28to approval where zero means a new
05:30design and numbers one and higher mean
05:32revision numbers
05:34finally the main part of the video is to
05:36look at the differences between the two
05:38engines
05:39the n55 was designed to comply with the
05:41euro 5 standard emission regulations
05:43whereas the b-58 was designed to comply
05:46with euro 6 standard emission
05:47regulations
05:49the n55 power output starts from 306
05:52horsepower or 400 newton meters of
05:55torque whereas the lowest power version
05:57of the first generation b-58 produces
05:59320 horsepower or 450 newton meters of
06:03torque the highest power version of the
06:05n55 the n55 p30 t0 found in the original
06:09m2 is capable of 370 horsepower or 465
06:13newton meters of torque whereas the
06:15highest power version of the b58 the
06:18b58b301
06:20found in the current x3 and x4 m40i
06:23m3 m440i and z4 m40i and now in the g42
06:29m240i is capable of 382 horsepower or
06:33500 newton meters of torque
06:35the engine block of the n55 is an open
06:37deck design whereas the b58 is a closed
06:40deck design the open deck design results
06:42in improved cooling but can handle lower
06:45pressures
06:46the closed deck engine block of the b-58
06:48which is shared with the b-57 can handle
06:51higher pressure such as those found in
06:52its diesel engine counterpart but
06:54cooling is more restricted
06:57consequently the b-58 features a more
06:59heavy-duty cooling system including a
07:01heat management module and the b58 tu
07:04also features split cooling please watch
07:07my b58 vs b58 tu video for details on
07:10the split cooling system
07:12importantly the b58 engine features a
07:15more heavy duty liquid cooled
07:16intercooler whereas the n55 has an
07:19air-cooled intercooler therefore the
07:21b-58 features a second coolant expansion
07:24tank and an additional electric coolant
07:26pump the n55 drives the engine coolant
07:28by an electrical coolant pump but the
07:30b-58 features a mechanical or engine
07:33driven coolant pump the n55's electrical
07:35coolant pump continues to operate after
07:38engine shutdown but the b-58 engine has
07:40an additional dedicated electric motor
07:42which continues to circulate coolant to
07:44the turbocharger after engine shutdown
07:47compared to the n55 the b58 exhaust
07:49turbocharger has a six percent larger
07:52turbine 10 larger compressor and is
07:55therefore able to produce 20 percent
07:56more boost please watch my dedicated
07:59b-58 turbocharger video for more details
08:02the fuel preparation pressure can reach
08:04200 bar for the n55 and the first
08:06generation b-58 but this has increased
08:09to 350 bar for the b58 tu the fuel
08:13injectors are solenoid type in both
08:14engines but although the first
08:16generation b58 features the same he dv
08:195.2 standard as found on the n55 the
08:23b58tu features he dv6 standard the n55
08:28features third generation vanos system
08:30versus fourth generation found in the
08:32b58 the n55 features a bed plate below
08:35the engine block but this is not
08:37installed on the b58 the b58 features
08:40forged steel crankshaft which is
08:42superior and more robust to the n55s
08:45cast iron crankshaft the b-58 features
08:48toughened internals such as bearings
08:50connecting rods and others in order to
08:52cope with start stop operation whereas
08:54such protection was not taken into
08:56account during the design of the n55
08:59the cylinders are protected with iron
09:01cylinder sleeves in the case of the n55
09:04but the cylinder wall protection is more
09:06advanced in the case of the b-58 using
09:08electric arc wiring spray lts
09:12the n55 features a power steering pump
09:15but the b-58 does not have a power
09:17steering pump
09:18a gas particulate filter system was
09:21introduced in 2018 on the b-58 something
09:24which is not implemented on the n55
09:27the highest power n55 does feature a
09:29dedicated oil cooler radiator which is
09:32not found on the highest power b-58
09:35engine displacement is the measure of
09:37the cylinder volume swept by all the
09:39pistons in the case of the n55 the
09:42displacement is 2979
09:45cubic centimeters whereas the b-58 has a
09:48displacement of 299
09:50cubic centimeters
09:52in a piston engine the cylinder bore is
09:54the diameter of each cylinder
09:56stroke length is the distance traveled
09:59by the piston during each cycle four
10:01stroke ratio or stroke bore ratio is a
10:03term to describe the ratio between the
10:06cylinder bore diameter and the piston
10:08stroke length in the case of the n55 the
10:11bore hole is 84 millimeters and the
10:13stroke length is 89.6 millimeters
10:16whereas in the case of the b-58 the
10:18borehole is 82 millimeters and the
10:21stroke length is 94.6 millimeters
10:24consequently the borehole to stroke
10:26ratio for the two engines is 0.94 for
10:29the n55 and 0.87 for the b-58
10:34in a combustion engine the compression
10:36ratio is calculated based on the
10:38relative volumes of the cylinder when
10:40the piston is at the bottom of its
10:41stroke and the volume of the cylinder
10:43when the piston is at the top of its
10:44stroke the compression ratio of the n55
10:47is 10.2 to 1 compared to the b58 11 to
10:511.
10:52the dme of the n55 is model mevd 17.2
10:57and the b58 is a more advanced 8th
11:00generation ecu model dme 8.6
11:04the n55 features a single part timing
11:07chain that is at the front of the engine
11:09the engine's weight is therefore front
11:11biased in the case of the b-58 the
11:13timing chain is at the back of the
11:15engine so the engine weight distribution
11:17is more balanced it should be noted that
11:20the first generation b-58 has a two-part
11:22timing chain whereas the latest b-58 tu
11:25has a return to a single timing chain
11:28this is just a quick comparison between
11:30the two engines and there are obviously
11:31a myriad of other differences and
11:33similarities between them through a
11:35modular design concept the b58 features
11:38more commonality with other bmw engine
11:40types eg the b-57 diesel engine and is
11:43able to produce and cope with more power
11:46and has lower emissions than the n55
11:48from around 200 grams per kilometer on
11:51the n55 to roughly 175 grams per
11:54kilometer which represents 12.5 percent
11:57reduction
11:58the b-58 does not seem to suffer from
12:00the carbon buildup issue which affected
12:02the n55 and its design has addressed the
12:05n55s crank hub central bolt failure mode
12:09all this makes the b58 truly a different
12:11class engine compared to the n55
12:14that's it guys i hope you enjoyed this
12:16quick video and i hope it was
12:18interesting let me know in the comments
12:20below what you guys think of the video
12:22and the two engines and what future
12:24videos you would like me to make
12:26as always thank you to all of you who
12:29watched and to all the subscribers
12:31see you in the next one
12:42you
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FAQs about This YouTube Video

1. What are the main differences between the BMW N55 and B58 engines?

The main differences between the BMW N55 and B58 engines include power output, cooling systems, turbochargers, and design elements. The B58 engine is shown to be more advanced, offering higher power and lower emissions compared to the N55.

2. How does the power output of the BMW N55 and B58 engines compare?

The power output of the BMW N55 and B58 engines vary, with the B58 engine offering higher power output compared to the N55. This makes the B58 engine more advanced and capable of delivering a better driving experience.

3. What are the differences in the cooling systems of the BMW N55 and B58 engines?

The cooling system of the B58 engine is designed to be more efficient, offering better heat dissipation and thermal management compared to the N55 engine. This contributes to the overall performance and longevity of the B58 engine.

4. How do the turbochargers in the BMW N55 and B58 engines differ?

The turbochargers in the B58 engine are more advanced, providing higher boost pressure and improved response compared to the N55 engine. This results in better throttle response and overall performance from the B58 engine.

5. What design elements set the BMW N55 and B58 engines apart?

The design elements of the B58 engine are more advanced, with features that contribute to higher power output and lower emissions. These design elements make the B58 engine a more advanced and efficient option compared to the N55 engine.

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