08-20-2020, 04:40 PM | #23 |
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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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2022 G82///M4 Competition X-Drive - KW-HAS, EBC Bluestuff, Millway Race Camber Plates, Cup2 Connect*, PSI High Flow Midpipe, Lightweight Front Lip, M Perf Flow Through Wing Previous • 2018 F80 ///M3 CS • 2016 F80 ///M3 IG: Raging_G82 |
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08-20-2020, 06:45 PM | #25 | |
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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, 11:06 PM | #28 |
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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, 05:09 PM | #31 | |
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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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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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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, 09:19 AM | #35 |
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08-23-2020, 09:40 AM | #36 |
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I could not have said it any better myself
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08-23-2020, 09:51 AM | #37 |
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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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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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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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M2 CS - with 6MT and CCB - 1525kg.
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08-23-2020, 04:13 PM | #41 | |
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The M2cs weighed by AMS/SA is a DCT with irons.
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08-23-2020, 04:13 PM | #42 | ||
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Sometimes, the simplest recipes, done well, with quality ingredients, are the tastiest, - evo Car of the Year 2020
2020 BMW F87 M2 CS - 6MT - Misano Blue Metallic |
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08-23-2020, 04:17 PM | #43 |
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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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