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E90 M3 (Sedan) | E92 M3 (Coupe) | E93 M3 (Convertible) (2008-2013) {Engine: S65 - Max Hp: 414 hp (420 hp Euro) at 8,300 rpm / 295 lb/ft at 3,900 rpm}


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Old Thu, Mar-22-2007, 03:48:38 AM   #1
fussychicken
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Default e92 M3 Offical Dyno Charts and Analysis!

Who ho! After all the commotion on the web last night about Road & Track breaking the G37 coupe embargo, I noticed the same issue had a cover story about the new M3. At first I thought it was just going to be a boring re-hash of the Geneva info, but NO! The issue has what appears to be an official dyno plot from BMW for the new M3!! It looks like Road & Track has broken a BMW embargo as well! Who ho indeed.

In the issue Road & Track says that BMW has offically told them:
  • 420 bhp @ 8300 rpm
  • 295 Ft*lb (400 Nm) @ 3900
  • C/R: 12:1
  • Redline: 8400
I took the dyno info and plotted all this in excel and wanted to share with you guys.
  • Note #1: Warning: I am a nerd for this dyno stuff, so I hope you enjoy.
  • Note #2: All of the BMW plots come from BMW. The RS4 plot is from Sport Auto. The e92 M3 plot is from Road & Track which appears to be straight from BMW. (And yes I know the N54 is underrated by BMW, but just bare with me here)
  • Note #3: I'm still kind of pissed that the M boys didn't put a flat plane crank in the e92 M3 motor, but it still looks to be nice nevertheless.

First off, lets take a look at the new M3 motor vs its in house stable mates the N54 in the 335i, and the S54 in the e46 M3. Comments:
  • The new M3 motor has SO much more area under the curve versus the S54. While I am a huge S54 fan (I personally love the rasp), this new motor is going to feel like an animal compared to the S54.
  • The N54 still has that huge torque advantage at low rpm. However, once the new M3 motor gets to around 4k rpm it is just going to pull so hard. While the N54 may still be fun in the city, the new M3 motor is still going to feel great.


UPDATE: The e92 M3 dyno graph is now plotted based on the slightly more accurate BMW info instead of the R&T graph.
Attached Images
File Type: jpg S54 vs N54 vs e92M3.jpg (57.1 KB, 298 views)

Last edited by fussychicken; Fri, Mar-23-2007 at 09:05:25 PM.
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Old Thu, Mar-22-2007, 03:52:49 AM   #2
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Secondly, lets look at it compared to its fellow motor rival, the RS4. Since the RS4 motor is 4.2 L, I also calculated a simple up size estimation of what the e92 M3 motor output would be if it were 4.2 L. (Note this calculation is a simple linear increase. Formula = (e92 M3 output * (4.2/4.0)) In the real world things don't always work so simple and there is no guarantee that the output would be as shown.)

<personal rant>
While I haven't really been impressed with any Audi motors, I have to admit that the motor in the RS4 puts out some GREAT stats. I haven't driven it though, because I hate AWD! I don't need all that extra weight Audi, thank you very much. Some companies like BMW still *trusts us* with *RWD only* for their *high performance* models. Thank you BMW! I don't need a heavy AWD nanny!
</personal rant>

Comments:
  • Both the e92 M3 motor and the RS4 motor are very similar.
  • In the fantasy world of a 4.2 L M3 motor, the difference is even less.
  • Conclusion: Audi has made one hell of a motor with their new RS4 motor. Thank god the new M3 is going to weigh less AND cost less.
Attached Images
File Type: jpg e92M3 vs RS4 vs e92M3up.jpg (60.9 KB, 178 views)

Last edited by fussychicken; Fri, Mar-23-2007 at 03:24:40 AM. Reason: UPDATE: The e92 M3 dyno graph is now plotted based on the slightly more accurate BMW info instead of the R&T graph.
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Old Thu, Mar-22-2007, 03:54:19 AM   #3
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Finally lets play fantasy land and see if we can glimpse into BMW's motor design ability.

1. We all know that the new e92 M3 motor is simply the S85 motor out of the M5 with two less cylinders. If that is the case, how does this dyno chart compared to a S85 dyno chart multiplied by 4/5? Theoretically the e92 M3 motor should have similar characteristics to the S85 right?
2. Secondly, the S54 was a huge technology leap when the motor was introduced. The M werks guys really outdid themselves with that motor. What if BMW designed the new M3 motor just like the S54? Shouldn't the output simply be a linear increase of 4.0/3.2? But that was in 1999, shouldn't it do even better than that?

Comments:
1. First off we can see that BMW significantly improved the performance of the e92 M3 motor versus a down sized S85. There is way more area under the curve at low rpm, AND slightly better top end! Who ho! This motor apparently represents a technological improvement over the S85.
2. WHAA?!?! If we could theoretically build a 4.0 L version of the S54, it would be more powerful than both!! Huh? Why would the new M3 motor not be more powerful on a liter by liter basis over the S54? And its not like its just in one area of the curve, its *everywhere.* Maybe for emissions reasons? Maybe they couldn't use big beefy cams like they did in the S54? In either case, this goes to show that the S54 is one hell of a special motor!
Attached Images
File Type: jpg e92M3 vs S85down vs S54up.jpg (62.3 KB, 102 views)

Last edited by fussychicken; Fri, Mar-23-2007 at 06:10:19 AM. Reason: UPDATE: The e92 M3 dyno graph is now plotted based on the slightly more accurate BMW info instead of the R&T graph.
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Old Thu, Mar-22-2007, 03:55:26 AM   #4
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Final conclusion: The new e92 M3 motor is very good. It will feel much faster than the S54. It also represents an improvement in motor design over the S85. BUT, its not really, how should I say, special. It is about the same as the RS4 although the M3 will probably be significantly cheaper. It also doesn't really represent any improvement in performance over the S54 on a liter by liter basis. Come on BMW, give us something REALLY cool for the CSL version and then maybe I'll buy one!
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Old Thu, Mar-22-2007, 04:17:43 AM   #5
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Good read!
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Old Thu, Mar-22-2007, 05:02:55 AM   #6
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Scans? thanks.
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Old Thu, Mar-22-2007, 05:57:34 AM   #7
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I think a high-revving V8 is cool
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Old Thu, Mar-22-2007, 06:26:02 AM   #8
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very nice writeup.

thx for your time and info
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Old Thu, Mar-22-2007, 07:41:58 AM   #9
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Quote:
Originally Posted by fussychicken View Post
Finally lets play fantasy land and see if we can glimpse into BMW's motor design ability.
1. We all know that the new e92 M3 motor is simply the S85 motor out of the M5 with two less cylinders. If that is the case, how does this dyno chart compared to a S85 dyno chart multiplied by 4/5? Theoretically the e92 M3 motor should have similar characteristics to the S85 right?
2. Secondly, the S54 was a huge technology leap when the motor was introduced. The M werks guys really outdid themselves with that motor. What if BMW designed the new M3 motor just like the S54? Shouldn't the output simply be a linear increase of 4.0/3.2? But that was in 1999, shouldn't it do even better than that?

Comments:
1. First off we can see that BMW significantly improved the performance of the e92 M3 motor versus a down sized S85. There is way more area under the curve at low rpm, AND slightly better top end! Who ho! This motor apparently represents a technological improvement over the S85.
2. WHAA?!?! If we could theoretically build a 4.0 L version of the S54, it would be more powerful than both!! Huh? Why would the new M3 motor not be more powerful on a liter by liter basis over the S54? And its not like its just in one area of the curve, its *everywhere.* Maybe for emissions reasons? Maybe they couldn't use big beefy cams like they did in the S54? In either case, this goes to show that the S54 is one hell of a special motor!
Nice job, fuzzy chicken!

So the reason the S54 is torquier than the new V8 is because it is a long-stroke design (vs. the short stroke V10 and V8). Short stroke allows for higher redlines (since less piston speed due to shorter stroke) and, thus, more HP at the top end. They sacrifice torque, though, and this is why the super high tech 5 liter V10 that makes 500 HP makes LESS torque than the old M5's 5 liter V8.

Although an 8400 RPM redline sounds fantastic (and is!), the actual piston will be traveling slower than the S54's piston at its 8K redline. The stress caused by these piston speeds in the S54 mandated a cast IRON block (= very heavy) and still resulted in quite a few blown engines (the engine would have never blown up had it had a 7K redline IMHO). Actually the Z3 roadster's S54 redlined at 7600 rpm, and most assume it is to prevent them from blowing up!

The new V8 is supposed to weigh the same as the S54 due to being an aluminum block. The lower piston speeds of the short stroke design probably have allowed them to build the engine lighter. 105 HP/liter is still damned impressive (and probably underrated).

I heard the M5's V10 engine was actually good to 9K RPM, but the accessories couldn't hang on at those RPMs. I predict the CSL will come through with around a 9K redline and another 30 HP.
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Old Thu, Mar-22-2007, 08:50:04 AM   #10
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Nice write up, thanks for sharing. Does R & T article mention second generation direct injection for the new V8 power plant?
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Discussing e92 M3 Offical Dyno Charts and Analysis! in the E90 M3 (Sedan) | E92 M3 (Coupe) | E93 M3 (Convertible) (2008-2013) Forum - {Engine: S65 - Max Hp: 414 hp (420 hp Euro) at 8,300 rpm / 295 lb/ft at 3,900 rpm} at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)