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BMW M2 Forum > BMW M2 CS Model > M2 CS Dyno - 491ps / 484 hp Stock (from Sport Auto)

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      08-20-2020, 04:40 PM   #23
KevM2
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I wonder if they give their press cars a different tune for more hp 🤔
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      08-20-2020, 06:41 PM   #24
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Quote:
Originally Posted by CanAutM3 View Post
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Originally Posted by jmg View Post
Most probably not. You would have to put them on the same dyno to be sure since dyno's aren't absolute. They all give different readings and should only really be compared to other cars on the same dyno.

So far ring times show that the M3/4 CS is still faster. M2 CS is in the 1:50's while the M3/4 CS is in the 1:30's. 20 seconds faster. Whether that is due to power is up to interpretation.
Not really. Comparing apples-to-apples, AMS/SA supertest results the M4cs and M2cs are within 1 second of each other (both in the 7:42). It has to be noted that the M4cs was tested on a rather hot day and the M2cs was tested on the faster repaved 'ring, but nonetheless, I expect the M2cs and M4cs to be very close in terms of performance.
That's what I'm saying. I don't think the M2 CS has more power. If anything slightly less if their ring times were that separated (depending on tires, weather, driver etc of course).
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      08-20-2020, 06:45 PM   #25
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Quote:
Originally Posted by jmg View Post
That's what I'm saying. I don't think the M2 CS has more power. If anything slightly less if their ring times were that separated (depending on tires, weather, driver etc of course).
My point is that the M4cs is not much faster (if at all) than the M2cs...

I agree, the M2cs does not make more power than the the M4cs. However, the slight power and torque deficit of the M2cs is made up by its lighter weight.
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      08-20-2020, 08:08 PM   #26
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Is this wheel horsepower or crank?

Has to be crank.
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      08-20-2020, 08:16 PM   #27
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What are BMW thinking? Gonna spin that crank hub!!
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      08-20-2020, 11:06 PM   #28
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Quote:
Originally Posted by jdub486 View Post
Is this wheel horsepower or crank?

Has to be crank.
Crank.

Maha dyno figure crank hp by measuring drivetrain loss. Blue line is measured whp, green line is drivetrain loss, red line is calculated crank hp (red=blue+green).
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      08-21-2020, 07:25 AM   #29
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Guess the price tag seems even less of a concern after these results.
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      08-21-2020, 09:52 AM   #30
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Quote:
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Guess the price tag seems even less of a concern after these results.
I agree with this. The CS will be a special car for those who are lucky enough to get an allocation. Just as long as they don't pay $30K over MSRP, which is new 911 Carrera S base price.
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      08-21-2020, 05:09 PM   #31
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Quote:
Originally Posted by EXE46 View Post
Quote:
Originally Posted by buzzybee View Post
dam thats wild
cant wait till these hit the used car market
Where it will cost more than new. This is BMW most desirable modern M car.
It's low volume and still pretty heavy, for the cost, it's sort of a parting gift M2 lovers. Personally I'd say just get a M2 race?

Anyway amazing 15 years later the economy car based M is putting out power equal to the top of the line M5
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      08-21-2020, 08:06 PM   #32
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Quote:
Originally Posted by LLNM4 View Post
It's just a tune.... the M4 GTS same S55 gives you 500hp
Stage II from Alex alpine or BM3 are more impressive.
Can not justify the price... i will wait for the G82 m4
Wasn't the GTS water-cooled? I think any tune can whack up hp but doing it with confidence to maintain a warranty is another thing altogether. I understand the CS has altered cooling and air circulation in the engine bay?
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      08-22-2020, 11:58 AM   #33
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Originally Posted by Jimjamz View Post
Wasn't the GTS water-cooled? I think any tune can whack up hp but doing it with confidence to maintain a warranty is another thing altogether. I understand the CS has altered cooling and air circulation in the engine bay?
The GTS has water injection in the intake to be able to maintain boost as IAT increases.

That's the thing with aftermarket tunes, they simply tap in the thermodynamic margin the S55 has. On stock tunes, the engine keep making peak power throughout an entire track session because it has sufficient thermodynamic margin to sustain the power despite the higher IAT. Aggressive aftermarket tunes are great for highway pulls, but will revert back to stock power levels after a few laps around a track.
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      08-23-2020, 08:42 AM   #34
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What do we think about torque? M4 CS is rated at 442 lb feet but the m2 CS at only 406.
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      08-23-2020, 09:19 AM   #35
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Quote:
Originally Posted by jdub486 View Post
What do we think about torque? M4 CS is rated at 442 lb feet but the m2 CS at only 406.
We think it's 36 lb ft less.
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      08-23-2020, 09:40 AM   #36
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Quote:
Originally Posted by EXE46 View Post
Quote:
Originally Posted by buzzybee View Post
dam thats wild
cant wait till these hit the used car market
Where it will cost more than new. This is BMW most desirable modern M car.
I could not have said it any better myself
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      08-23-2020, 09:51 AM   #37
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Quote:
Originally Posted by jdub486 View Post
What do we think about torque? M4 CS is rated at 442 lb feet but the m2 CS at only 406.
As posted previously, this is consistent with the dyno AMS/SA charts, the M2cs showed ~590N-m while the M4cs showed ~640N-m, ~9% more just as the official rating.
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      08-23-2020, 11:56 AM   #38
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Quote:
Originally Posted by CanAutM3 View Post
Quote:
Originally Posted by jmg View Post
That's what I'm saying. I don't think the M2 CS has more power. If anything slightly less if their ring times were that separated (depending on tires, weather, driver etc of course).
My point is that the M4cs is not much faster (if at all) than the M2cs...

I agree, the M2cs does not make more power than the the M4cs. However, the slight power and torque deficit of the M2cs is made up by its lighter weight.
Can you give us an apples to apples weight comparison?
From what I understand, despite being marginally larger, the F80/82 was ever so slightly lighter.
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      08-23-2020, 01:43 PM   #39
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Quote:
Originally Posted by Ragged Edge View Post
Can you give us an apples to apples weight comparison?
From what I understand, despite being marginally larger, the F80/82 was ever so slightly lighter.
It's all in this thread

If you look at the screenshots from the M2cs and M4cs dynos, the weight of each car is also posted:
M2cs: 1588kg
M4cs: 1609kg

M4cs is lighter than M2C but heavier than M2cs
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      08-23-2020, 03:06 PM   #40
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Quote:
Originally Posted by CanAutM3 View Post
Quote:
Originally Posted by Ragged Edge View Post
Can you give us an apples to apples weight comparison?
From what I understand, despite being marginally larger, the F80/82 was ever so slightly lighter.
It's all in this thread

If you look at the screenshots from the M2cs and M4cs dynos, the weight of each car is also posted:
M2cs: 1588kg
M4cs: 1609kg

M4cs is lighter than M2C but heavier than M2cs
https://www.pistonheads.com/news/ph-...k-review/42864

M2 CS - with 6MT and CCB - 1525kg.
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      08-23-2020, 04:13 PM   #41
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Originally Posted by Turbomeister View Post
1550kg is the DIN spec weight for a 6MT, they just deducted 25kg for the CCB. It's not actual measured weight.

The M2cs weighed by AMS/SA is a DCT with irons.
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Last edited by CanAutM3; 08-23-2020 at 05:14 PM..
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      08-23-2020, 04:13 PM   #42
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Quote:
Originally Posted by CanAutM3 View Post
Quote:
Originally Posted by Turbomeister View Post
That's the DIN spec weight, not an actual measured weight.
Isnt the Din weight the actual car weight ? EU curb weight includes the driver - 75kg more . Not all the drivers weight 75kg thought.
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      08-23-2020, 04:17 PM   #43
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Quote:
Originally Posted by Turbomeister View Post
Isnt the Din weight the actual car weight ? EU curb weight includes the driver - 75kg more . Not all the drivers weight 75kg thought.
It's a "spec" weight, for certification purposes, different cars will have different weights depending on options. The DIN spec weight of the M4 when it was released was 1497kg, you'll be hard pressed to find an example that is that light. That's why I prefer to rely on actual weighing from "trustable" publications.
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      08-24-2020, 07:14 AM   #44
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Is this level of output attainable in a 2020 M2C? I've heard of a few tunes out their but I'm fairly ignorant.
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