I own a F82 and was considering change to G82 but have few issues with is mainy the front and also the fact it’s not as nimble as F82. The new car is line an older 5 series.

Thank you for such kind words...

I'm under the impression that the additional power output for the competition-version engines is through an ECU tune alone (i.e. there are no noteworthy physical changes). However, I will double-check this.

It's just more aggressive software. Engine is the same

@@rodgazinya Yes, I think so too. I was hoping to find any competition version car on RealOEM fitted with S58 to compare S58 comp and S58 non-comp, but I can't find any comp car fitted with S58 on RealOEM (See M2 for example, there is both M2 and M2 competition on RealOEM). Anyway, I don't think there are any hardware changes, it must be similar to M-Performance Power and Sound Kit (MPPSK) for B58 cars, extra power comes from ECU remap.

Thank you, just a very happy owner of one or two BMWs. ;)

🤣😂

Hi, there are configuration differences between M3/M4 and X3M/X4M with S58. The engine cover doubles as the intake muffler and combined filter box on the X3M/X4M but the M3/M4 feature a simpler engine cover and traditional separated intake muffler boxes, this means alot of the air ducts are different. There are different braces in the engine bay, differences in the location of coolant expansion tanks and other miscellaneous changes, I believe driven by the space available between the two engine bays (M3/M4 vs X3M/X4M). But I believe the internals (turbos, crankshaft, pistons, block, cylinder head, etc) are identical. All S58s have 3D printed cylinder head, forged pistons, forged crankhaft, etc. The engine mapping difference is between the competition and non competition cars. "Competition package" cars will have more hp and torque purely through the engine mapping, as again the internals are identical.

@@NoBrainerTalk Thanks! Great info. So the 2022 X3 M S58 torque increase is just an engine programming difference, i.e. more boost? There’s no mechanical differences between 2020/2021 and 2022 models?

@@BurnsRubber Correct, they are all S58B30T0 engines and if you have a competition version you get a tune that gives you more power. Even with the competition tune, it's probably still underpowered (probably power will increase further with more limited edition versions like CS).

I agree

Hi, the percentage differences are quoted by BMW, but is not a scientific number, because as you very rightly point out, it doesn't specify what is being measured (unique part numbers, part quantities, part weights, part costs, etc). Personally I always take it to mean, how many new engineering drawings had to go through final approval (so when BMW says the S58 is 90% new compared to B58, this means 90% new engineering schematics to build parts), but this is my personal guess and is not based on anything. Much of what BMW and pretty much all manufacturers state are heavily influenced by marketing considerations aswell, so it is always difficult to extract useful scientific conclusions from their press releases.

Can confirm, plugs are surely easier to remove on the S58 than the S55.

Thanks for sharing.

Hi there, one way BMW has been able to increase the power of the S58 over the S55 is by optimising the design to minimize pressure losses, hence the S58 engine block is designed to be continuously subjected to higher pressures. It therefore needs to be more robust than previous designs. It's also unlikely that it was designed just for max output of 510hp of the competition package engines, it's quite likely that future variants e.g. in future LCI or limited edition M-Cars, could have an even higher power output. I would therefore personally conclude that the S58 block is designed to be more robust than the S55's.

@@NoBrainerTalkThanks for your reply! Makes a lot sense considering there are more powerful upcoming models equip with the S58 and S58 has to be more robust to handle the extra power

Sounds interesting, would love to check out the video if you have the link.

@@NoBrainerTalk Video in Russian language but you can see cars dash with warnings kzfaq.info/get/bejne/bJupnsWavtW7h5s.htmlsi=CKnqfuup2vkARbp8 they start their test at 8 min and around 9 minute mark they travel to the dude with m4 and do same test on both cars in same conditions. He said they took it to service and they didn’t find anything wrong with engine

On the S58 the hub is one piece with the crankshaft.

I believe the S58 uses the B58's design (4 bolt).

I think the M division followed a very similar formula (in the case of both S55 and S58) in terms of what they added and what they removed compared to the baseline engine. However the baseline engine design is what truly drives fuel efficiency and performance potential. Having said that, the S58 is 90% new compared to the B58TU (maybe would have been different percentage compared with 1st gen B58) so possibly you are right... You make an interesting point!

Actually the S55 has lower fuel consumption and lower emissions according to BMW, and it seems to be confirmed in real life. Keep in mind the S58 is fitted to heavier cars so it has to do more work to accomplish the same performance as the S55. If someone fits an S58 into an F80 M3 for example, then we could really see how much the engines are different in economy. Or alternatively maybe cut 200kg off a G80 M3 is another way to do a comparison..

@@NoBrainerTalk 👍 Thanks, that would be an interesting project for comparison.

Hi, so I did not include details about weight because I do not have accurate information. There is some weight information available but the exact peripherals included is unclear (i.e. how the dressed the engine is in each case). Some sources place the dry weight of the N55 at about 190kg, and the S55 at about 205kg. This means the M-Division added roughly 15kg of weight with the modifications made (second fuel pump, etc). At the time the M-Division said that the two smaller single scroll turbos did not weigh much more than the single twin scroll turbo, so with the use of more advanced materials they kept the weight increase to a minimum. In any case the B58 weighs less than the N55, at about 140kg. In the case of the S58, the M-Division modified the B58 engine more substantially, including deletion of the heat management module. I would therefore purely guess that the S58 did not gain more than 15kg over the baseline B58, so I would purely guess that the S58 should be approx. 155kg. So it is my pure guess that the S58 could weigh as much as 60kg less than the S55 (but of course I could be completely wrong as this is based on many assumptions). MY COMMENT IS INACCURATE AND SHOULD BE IGNORED... :)

@@NoBrainerTalk This is very interesting information and more than I've been able to find myself. Are you sure the B58 is that much lighter than the N55? I read somewhere it was actually 10kg heavier.

@@harbl2479 Hey there, I am completely unsure is the honest answer. 🥺😨 Some sources place the weight of both N55 and B58 engines at between 130-133kg, so everything I said before could be wrong! Actually, let's just say it's wrong. The only weight that is confirmed by BMW is the weight of the S55 at 205kg. But we don't actually know what components are included or excluded in each case, so we might be comparing apples with oranges. Ignore my previous answer, and if you are able to find an accurate weight for each engine I will be very interested to know. :)

@@NoBrainerTalk I store info at the back of my head, that the B58 dry wieght is 139kg.

Nice, thanks!