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      09-04-2020, 09:34 AM   #1
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Drag race M2cs vs X4Mc

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      09-04-2020, 10:05 AM   #2
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He needed the DCT for that race, it would have been much closer.
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      09-04-2020, 10:12 AM   #3
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Crazy, test drove a few X3M's and they felt pretty slow. Surprised it beat the M2CS
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      09-04-2020, 10:55 AM   #4
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Not too surprising. 503 hp/447 lb ft, AWD, automatic.

Anyway the CS (and the M2 and M2C) are are about anything BUT 0-60 times IMO.
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      09-04-2020, 11:04 AM   #5
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Quote:
Originally Posted by KevinM View Post
Not too surprising. 503 hp/447 lb ft, AWD, automatic.

Anyway the CS (and the M2 and M2C) are are about anything BUT 0-60 times IMO.
exactly... 0-60 times are meaningless for any car
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      09-04-2020, 12:09 PM   #6
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Quote:
Originally Posted by KevinM View Post
Not too surprising. 503 hp/447 lb ft, AWD, automatic.

Anyway the CS (and the M2 and M2C) are are about anything BUT 0-60 times IMO.
Quote:
Originally Posted by ND40oz View Post
He needed the DCT for that race, it would have been much closer.
At some point in the video, they show 0-100km/h and 0-200km/h. Doing the math, the M2cs is quicker from 100-200km/h. A DCT would have been even quicker.
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      09-04-2020, 12:17 PM   #7
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4.6s awful time and not a true M2CS representation I think.
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      09-05-2020, 09:45 PM   #8
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The X4 M was hauling ballpark 400 kg over the CS...

The S58 is a beast, imagine the same engine in the CS
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      09-06-2020, 02:07 PM   #9
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Quote:
Originally Posted by CosmosMpower View Post
Crazy, test drove a few X3M's and they felt pretty slow. Surprised it beat the M2CS
Launch control on our X4MC is insanity. Your brain shifts to the back of your head like a Tesla. Our draggy did a 3.5. That car is scary fast but agree that it doesn't feel like it often during "regular" driving. But in sport+ post break in, damn is that thing fun and surprisingly good at handling the canyons.

Then again, 0-60 don't mean much, which is why we own an X4MC and an M2C.
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      09-07-2020, 04:40 PM   #10
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Did they ever fix the lag off the line when you aren't using launch control?
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      09-07-2020, 04:56 PM   #11
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Quote:
Originally Posted by chris719 View Post
Did they ever fix the lag off the line when you aren't using launch control?
What lag?
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      09-07-2020, 05:00 PM   #12
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Quote:
Originally Posted by CanAutM3 View Post
What lag?
On the two that I drove, if you floor it off the line it hesitates for a bit as if the transmission or something else is figuring out what to do. Didn't happen in the M4 I drove right after.

https://g20.bimmerpost.com/forums/sh...php?p=25052759
https://x3.xbimmers.com/forums/showthread.php?t=1642867
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      09-07-2020, 06:58 PM   #13
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Quote:
Originally Posted by chris719 View Post
On the two that I drove, if you floor it off the line it hesitates for a bit as if the transmission or something else is figuring out what to do. Didn't happen in the M4 I drove right after.

https://g20.bimmerpost.com/forums/sh...php?p=25052759
https://x3.xbimmers.com/forums/showthread.php?t=1642867
The two treads you are referring are about ZF 8AT equipped M vehicles, not sure how that relates to the F8X with DCT... ?
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      09-07-2020, 07:00 PM   #14
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Quote:
Originally Posted by CanAutM3 View Post
The two treads you are referring are about ZF 8AT equipped M vehicles, not sure how that relates to the F8X with DCT... ?
I was talking about the X3M/X4M, sorry for the confusion. Was a question for Thescout13 as he posted about it right above. It's not 8AT specific either, because the M5 does not do it.
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      09-07-2020, 07:25 PM   #15
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Quote:
Originally Posted by chris719 View Post
I was talking about the X3M/X4M, sorry for the confusion. Was a question for Thescout13 as he posted about it right above. It's not 8AT specific either, because the M5 does not do it.
Ah, OK. Got it
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      09-08-2020, 10:36 AM   #16
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Quote:
Originally Posted by chris719 View Post
Quote:
Originally Posted by CanAutM3 View Post
The two treads you are referring are about ZF 8AT equipped M vehicles, not sure how that relates to the F8X with DCT... ?
I was talking about the X3M/X4M, sorry for the confusion. Was a question for Thescout13 as he posted about it right above. It's not 8AT specific either, because the M5 does not do it.
If you launch right (follow the launch control feature not just mash the pedal) there is zero lag. If you just smash the throttle without launch control there is still a bit of lag for it to build boost. With launch control, boost builds while holding the RPMs and you are gone.
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      09-20-2020, 05:16 PM   #17
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The M2CS is quick but the S58 is just a whole different beast. Can't wait to see it on the new G8X's.
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      09-20-2020, 05:35 PM   #18
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Quote:
Originally Posted by CosmosMpower View Post
Crazy, test drove a few X3M's and they felt pretty slow. Surprised it beat the M2CS
They run 3.3 0-60 and 11.6 1/4 mile stock and they weight 4600 lbs. They're not slow by any means. S58 is vastly superior to S55 even ignoring the whole crank hub ticking time bomb issue with S55.
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      09-20-2020, 07:05 PM   #19
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Quote:
Originally Posted by robopp View Post
They run 3.3 0-60 and 11.6 1/4 mile stock and they weight 4600 lbs. They're not slow by any means. S58 is vastly superior to S55 even ignoring the whole crank hub ticking time bomb issue with S55.
Any chance you can point to a detailed comparison of the S55 vs S58? I'm interested in this and how each develops power. There's a consistent argument that the S58 is vastly superior to the S55, but I haven't been able to uncover why.
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      09-20-2020, 08:37 PM   #20
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Quote:
Originally Posted by medphysdave View Post
Quote:
Originally Posted by robopp View Post
They run 3.3 0-60 and 11.6 1/4 mile stock and they weight 4600 lbs. They're not slow by any means. S58 is vastly superior to S55 even ignoring the whole crank hub ticking time bomb issue with S55.
Any chance you can point to a detailed comparison of the S55 vs S58? I'm interested in this and how each develops power. There's a consistent argument that the S58 is vastly superior to the S55, but I haven't been able to uncover why.
Here are the technical documents:

S55
https://f80.bimmerpost.com/forums/at...6475520#page29

S58
https://www.bimmerpost.com/goodiesfo...ine.pdf#page29

S58 has forged internals and two HPFPs along with additional cooling. Crank hub issue has been resolved too
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      09-20-2020, 09:18 PM   #21
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Ive read these before, which led me to believe the S58 uses a lower compression ratio to take advantage of higher boost pressure without detonation to make more power in stock form. Usually this comes with some out of boost lag, but the comp ratio is still not what I would consider low. This seems to have come with an improvement in efficiency. Does the S58 head flow more than S55? I can see why it's viewed as superior.
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      09-21-2020, 07:09 AM   #22
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Quote:
Originally Posted by robopp View Post
S58 has forged internals and two HPFPs along with additional cooling. Crank hub issue has been resolved too
I'll have to dig around today, but I believe all of that is true of the S55 as well except the crank hub issue. Which, if the S58 is still a keyless hub design will still have some level of risk as well.

EDIT: Sources are all over the map, some saying forged rods, some saying forged pistons, some saying both on the S55. The consistent information though is the internals handle plenty of power, so it's a moot issue from that standpoint as unless you are trying for 800+hp it's a non-factor in operation.

Last edited by sdhotwn; 09-21-2020 at 08:10 AM..
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