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BMW M2 Forum > M2 vs... > The B58 feels stronger than the S55 at low RPM or is it just me?

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      12-23-2019, 07:27 PM   #23
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Quote:
Originally Posted by ASAP View Post
yes justin gatlin got caught for doping... i.e. a tuned B58
A tuned B58 running on E85
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      04-05-2022, 08:38 PM   #24
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Originally Posted by bimmer456 View Post
See the videos drag racing the Supra vs M2 Comp. B58 faster off the line. So yes.




They (Toyota maybe as well as BMW?) Seemed to have been able to tune the top end of the B58 as well for better results towards top speed and higher MPH...

M2 Competition DCT

C/D
TEST RESULTS
Zero to 60 mph: 4.0 sec
Zero to 100 mph: 9.1 sec
Zero to 130 mph: 15.9 sec
Rolling start, 5–60 mph: 4.3 sec
Top gear, 30–50 mph: 2.3 sec
Top gear, 50–70 mph: 2.8 sec
Standing ¼-mile: 12.4 sec @ 116 mph
Top speed (govenor limited, mfr's claim): 174 mph
Braking, 70–0 mph: 155 ft
Roadholding, 300-ft-dia skidpad: 0.99 g

2021 Supra

C/D TEST RESULTS
60 mph: 3.8 sec
100 mph: 8.8 sec
130 mph: 15.2 sec
150 mph: 21.9 sec
Rolling start, 5–60 mph: 4.4 sec
Top gear, 30–50 mph: 2.7 sec
Top gear, 50–70 mph: 2.7 sec
1/4 mile: 12.1 sec @ 117 mph
Top speed (governor limited): 160 mph
Braking, 70–0 mph: 152 ft
Braking, 100–0 mph: 304 ft
Roadholding, 300-ft-dia skidpad: 1.02 g
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      04-11-2022, 09:05 PM   #25
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I have an M2 comp with the m4cs tune. And a stock x3 m40 2020 with the b58tu. The b58 has more torque below 2500 rpm and feels less laggy at low revs. But it's not as aggressive as the s55 in the midrange and the s55 with the CS tune has a monstrous midrange. But the b58tu is very, very impressive. It's probably the best engine I've experienced. Incredibly smooth, near instant torque, free revving, and pulls very well at all rpm's for a turbo engine.
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      04-12-2022, 06:05 AM   #26
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This still a discussion in 2022?

The S55 on the M2 is faster than the B58 on the supra, 0-60 values are all tracktion based only. At high speeds the difference is very noticeable.
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      04-12-2022, 07:49 AM   #27
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This still a discussion in 2022?

The S55 on the M2 is faster than the B58 on the supra, 0-60 values are all tracktion based only. At high speeds the difference is very noticeable.
Yes, it's still a discussion, and the operable word is "feel." The B58 does feel like it has more torque down low than the S55, and so does the N55, it just is what it is.
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      04-19-2022, 05:48 PM   #28
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Quote:
Originally Posted by Bumpinjeep View Post
Quote:
Originally Posted by heavyD^2 View Post
The S58 is probably going to be a considerable improvement over the S55. It propels the 4300 lb X3 M to 0-60 mph in 4 seconds and 1/4 mile times of 12.4 seconds which are numbers that put it in the same ballpark as the M2C.
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Originally Posted by heavyD^2 View Post
The S58 is probably going to be a considerable improvement over the S55. It propels the 4300 lb X3 M to 0-60 mph in 4 seconds and 1/4 mile times of 12.4 seconds which are numbers that put it in the same ballpark as the M2C.
it's faster, much faster actually. Car and Driver or Motor Trend just did their instrument tests on a X4C. 0-60 in 3.3 & 11.7 @ 119. So in a straight line, the X4 Comp will blow the M2 Comp away.
I certainly hope so, it has xDrive
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      05-23-2022, 10:50 AM   #29
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I feel like it's less to do with the engines themselves and more to do with the mapping.

BMW could have made the M2 Comp an M2 on steroids and had it go like a rocket from 1500rpm but they wanted to make it a more track-focused car that's controllable. What good is a track car if you can't control it?

Whereas the M240i, OG M2 etc. are made for the street, and they want to blow you away from the moment you press the pedal (which they do)

The M2 comp is fast as hell but it's not nearly as fun as the OG up to like 70/80mph. However from what I have read once you tune then the Comp is another level. Obviously, not everyone wants to tune though and I agree, I wish they made it more aggressive low down.

In an ideal world, the Comp would pull like the N55/B58 low down (well even harder) and then progress through the revs like the S55 does.
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      05-26-2022, 09:19 PM   #30
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Quote:
Originally Posted by ///MFrankie View Post
I feel like it's less to do with the engines themselves and more to do with the mapping.

BMW could have made the M2 Comp an M2 on steroids and had it go like a rocket from 1500rpm but they wanted to make it a more track-focused car that's controllable. What good is a track car if you can't control it?

Whereas the M240i, OG M2 etc. are made for the street, and they want to blow you away from the moment you press the pedal (which they do)

The M2 comp is fast as hell but it's not nearly as fun as the OG up to like 70/80mph. However from what I have read once you tune then the Comp is another level. Obviously, not everyone wants to tune though and I agree, I wish they made it more aggressive low down.

In an ideal world, the Comp would pull like the N55/B58 low down (well even harder) and then progress through the revs like the S55 does.
It’s interesting…coming from Porsche, the M2 Comp almost feels a little too hot on the low end. Which means it’s just right (for me at least).
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      05-27-2022, 06:31 AM   #31
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Quote:
Originally Posted by Rk-d View Post
It’s interesting…coming from Porsche, the M2 Comp almost feels a little too hot on the low end. Which means it’s just right (for me at least).
Really? Which Porsche did you have?

The only Porsche I ever went out in was a 911 Turbo S and that thing was a rocket.

Just looked at your profile and it says 992 TTS? Surely the M2 Comp doesn't feel torquier low down than the 992 Turbo S? Don't break my heart here
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      06-12-2022, 08:19 AM   #32
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Motorsport/performance versions of many cars are intentionally limiting torque at lower rpm especially when the steering wheel is turned… this is to reduce snap oversteer. Remember that pre 2017 M3/M4 cars would oversteer easily coming out of turns, the same S55 motor with competition tune is now limiting torque at lower rpm for better control…
My 2017 Giulia Quadrifoglio clearly limits torque coming out of corners/turns until the steering is fully straight, then I feel a surge of torque..

So this is not turbo lag/transmission software issue but actually intentional tuning as such by the manufacturers..
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      06-12-2022, 08:43 AM   #33
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The B58 is torquier down low... this is because it has smaller turbos and is mapped a bit differently. This is also because this is the engine used in most BMWs that are made to be daily driven... this makes it more comfortable to drive around town stop light to stoplight.

As far as midrange and outright power... there is no comparison... the S55 would run away like a jet... it has way larger turbos and can produce far more outright flow. Like someone mentioned, it's also purposely setup with a linear tune to be easier to drift and come out of corners when tracking... its the same exact story w the newer S58... some say the S58 has even less grunt down low.
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      06-12-2022, 09:36 AM   #34
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Having owned both, I was quite surprised how much faster my M2C feels than my Supra did.
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      06-19-2022, 06:41 AM   #35
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Quote:
Originally Posted by ASAP View Post
The B58 is torquier down low... this is because it has smaller turbos and is mapped a bit differently. This is also because this is the engine used in most BMWs that are made to be daily driven... this makes it more comfortable to drive around town stop light to stoplight.

As far as midrange and outright power... there is no comparison... the S55 would run away like a jet... it has way larger turbos and can produce far more outright flow. Like someone mentioned, it's also purposely setup with a linear tune to be easier to drift and come out of corners when tracking... its the same exact story w the newer S58... some say the S58 has even less grunt down low.
B58 has one twin scroll turbo.
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      06-21-2022, 10:44 AM   #36
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I've owned the M235i with the N55 and now have the M2C with the S55. The M235 was a rocket in everyday traffic but lost its breath at higher revs. IMHO the stock M2C tune is more linear. However, just a slight tune turns the S55 into a monster which needs stickier rubber to keep the car from constant wheel spin.
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