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2019+ BMW 3 AND 4-SERIES FORUMS (G2x Generation) General G80 M3 Sedan Forum (2019+) S58 Engine Technical Document

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      06-10-2019, 03:51 PM   #1
ynguldyn
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S58 Engine Technical Document

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S58 Engine Complete Vehicle Technical Document

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S58 Engine: Specs and First Look
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      07-16-2019, 08:10 AM   #2
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Thank you!

I wish they will add electric turbo to spool the low RPM.
Maybe next generation
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      07-16-2019, 08:30 AM   #3
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Quote:
Originally Posted by ynguldyn View Post
I read in the document that the 0-100 kmh time is 4.3 seconds!? Does this mean that the g8X m4/m3 are not going to be awd? I'm confused
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      07-16-2019, 09:22 AM   #4
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Quote:
Originally Posted by MajorNuke View Post
I read in the document that the 0-100 kmh time is 4.3 seconds!? Does this mean that the g8X m4/m3 are not going to be awd? I'm confused
The column in the chart that lists 0-100 hm/h in 4.3s is clearly labeled "F80/F82" which means it is for the outgoing/current generation models. This information is used only as a basis for comparison to the new X3/X4 M. There is no performance data available for the G8x M3/M4 yet.
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      07-16-2019, 10:09 AM   #5
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      07-16-2019, 10:13 AM   #6
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I'm not sure if I missed something, but is there any information regarding CO2 emissions for these new engines?

Belgium adds a tax based on the CO2 emissions of the engine, which amounts to around €5k for the F8x.
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      07-16-2019, 10:23 AM   #7
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Wonder if the crankhub issue has been fixed
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      07-16-2019, 11:02 AM   #8
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no water injection?
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      07-16-2019, 11:10 AM   #9
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Quote:
Originally Posted by t$ View Post
no water injection?
It's not necessary to hit 500hp with this engine. And the last thing people want is another maintenance item to think about, even just filling up a tank with water.

Perhaps a future M4 CSL will take advantage of water injection to boost output up to around 600hp.
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      07-16-2019, 11:10 AM   #10
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Quote:
Originally Posted by Fhey View Post
I'm not sure if I missed something, but is there any information regarding CO2 emissions for these new engines?

Belgium adds a tax based on the CO2 emissions of the engine, which amounts to around €5k for the F8x.
Says that it's ULEV 70... don't know how that translates for your country's specific laws... but I know it shows be "greener" than the outgoing model
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      07-16-2019, 11:31 AM   #11
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Maximum engine speeds of "the S58 up to 7500rpm." On cars with torque converters, the engine speeds will be limited to 7200rpm. So it seems they at least designed this engine to mate with a manual transmission. Hopefully...
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      07-16-2019, 11:39 AM   #12
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      07-16-2019, 11:39 AM   #13
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Quote:
Originally Posted by mkoesel View Post
It's not necessary to hit 500hp with this engine. And the last thing people want is another maintenance item to think about, even just filling up a tank with water.

Perhaps a future M4 CSL will take advantage of water injection to boost output up to around 600hp.
And an AC electric high power motor to boot ...
This truly ' hybrid ' or mix
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      07-16-2019, 11:50 AM   #14
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Looks like a solid engine. However, disabling piston oiling in favor for fuel efficiency worries me a little. The dual HPFPs and mechanical water pump are huge plusses in my book!
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      07-16-2019, 12:02 PM   #15
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Pretty cool they had the room to fit the intake box on top of the engine, although it makes me wonder if any additional turbo lag is noticed with the amount of intake piping for this engine (vs. the B58).

Seems they also moved the powerband up in the RPM range a bit vs. the S55; about ~500-700 RPM. I wonder how that'll make it "feel" below 2500 RPM vs. the outgoing M3/M4.
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      07-16-2019, 12:16 PM   #16
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Quote:
Originally Posted by DrifterX View Post
Pretty cool they had the room to fit the intake box on top of the engine, although it makes me wonder if any additional turbo lag is noticed with the amount of intake piping for this engine (vs. the B58).

Seems they also moved the powerband up in the RPM range a bit vs. the S55; about ~500-700 RPM. I wonder how that'll make it "feel" below 2500 RPM vs. the outgoing M3/M4.
Drove the X3m Competition yesterday back to back after the new m340i. Noticeably more lag in the X3M comp from a standing start/at very low rpms, but obviously pulled way harder as the rpm's rose. Would probably be negated completely with launch control/from a roll.
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      07-16-2019, 12:22 PM   #17
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Quote:
Originally Posted by DrifterX View Post
Pretty cool they had the room to fit the intake box on top of the engine, although it makes me wonder if any additional turbo lag is noticed with the amount of intake piping for this engine (vs. the B58).

Seems they also moved the powerband up in the RPM range a bit vs. the S55; about ~500-700 RPM. I wonder how that'll make it "feel" below 2500 RPM vs. the outgoing M3/M4.
I doubt the intake piping is why the powerband is shifted to the right. It's still a more efficient design than using an FMIC and piping it all around the engine bay.

It's probably because they are using larger turbochargers for more power. There's no way of getting around bigger turbos for more power leading to turbo lag. That's why something like a McLaren has a lot of turbo lag and a car like the BMW 330i does not.
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      07-16-2019, 01:13 PM   #18
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Quote:
Originally Posted by kylejdavidson View Post
Drove the X3m Competition yesterday back to back after the new m340i. Noticeably more lag in the X3M comp from a standing start/at very low rpms, but obviously pulled way harder as the rpm's rose. Would probably be negated completely with launch control/from a roll.
Yeah, the power difference in the mid-higher RPM range will definitely be more noticeable than in the low RPM range. Regarding the lag, I realized the S55/S58 have two mono-scroll turbos whereas the B58 has one twin-scroll turbo; not a very apples-to-apples comparison as the two types of turbos spool differently.

Quote:
Originally Posted by upsidedownfunnel View Post
I doubt the intake piping is why the powerband is shifted to the right. It's still a more efficient design than using an FMIC and piping it all around the engine bay.

It's probably because they are using larger turbochargers for more power. There's no way of getting around bigger turbos for more power leading to turbo lag. That's why something like a McLaren has a lot of turbo lag and a car like the BMW 330i does not.
Intake piping is definitely not the cause of any change powerband; it's just how they designed/tuned it.

Good point on the bigger turbo vs lag but according to the document: "The S58 engine has a twin-turbocharger system using mono-scroll turbochargers as also used on the S55 engine." (pg 69). Leads me to think the turbos aren't too different between S55 & S58.
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      07-16-2019, 01:14 PM   #19
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Quote:
Originally Posted by CT92F80 View Post
Wonder if the crankhub issue has been fixed
B58 don't have crank hub issue so i think yes they did
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      07-16-2019, 01:20 PM   #20
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What does the lower compression ratio tell us?
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      07-16-2019, 01:32 PM   #21
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Quote:
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What does the lower compression ratio tell us?
More lag and less power off-boost, but potential for higher boost levels
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      07-16-2019, 01:53 PM   #22
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Are the chain guide rails still plastic?
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