10-03-2018, 07:28 PM | #89 |
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10-03-2018, 07:35 PM | #90 |
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I'm past 2.5k in a millisecond, I don't notice.
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10-03-2018, 08:07 PM | #91 |
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The N55 has the same exact crankhub assembly. It was coded out because early owners and reviewers did not like all the power down low. They asked for a more linear powerband. Remember a lot of the owners were coming from their previous E9x M3, that built power through the rev range. The revised bed plate was to address crank hub. Cars built after 12/15 have new bed plate.
Last edited by hellrotm; 10-03-2018 at 08:17 PM.. |
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10-03-2018, 08:08 PM | #92 |
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10-04-2018, 04:43 AM | #94 |
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Am I the only one that's disappointed in this? I assumed that the M2C would be much closer in power to the F80/2 since their ratings are closer on paper.
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10-04-2018, 06:01 AM | #95 |
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10-04-2018, 06:18 AM | #96 | |
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Different day, different chassis, different set of wheels and tires all play as variables. One of my ex car had a 40hp at the wheels advantage to my friend’s car (same as mine) but turns out that we accelerated at the same rate and end up at the same speed upto 200km/h... The quarter mile trap speed is a much better indicator to gauge engine power delta between different cars, not chassis dyno. |
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10-04-2018, 06:55 AM | #97 | |
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These numbers are a reference that I would not take seriously. Go look at a car with a th400 swap... the drivetrain absorbs a ton of power but it performs fantastic. Also, stock numbers are boring. These cars are meant to be toyed with. I couldn't imagine waking up in the morning and thinking "time to go drive my stock car"
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10-04-2018, 08:08 AM | #98 | ||
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10-04-2018, 08:31 AM | #99 | |
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Buy Repeat
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10-04-2018, 01:03 PM | #100 |
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Unfortunately, the only GTS runs we have were during troubleshooting of a failed water injector system (seems to be a widespread issues) and would not be useful for comparison.
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10-04-2018, 01:42 PM | #101 |
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SAE numbers?
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10-04-2018, 01:46 PM | #102 | |
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10-04-2018, 01:57 PM | #103 |
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They both make their peak HP at around 6K RPM and then the HP curve starts to decline slowly for both models. I don't know where you are seeing M2C making peak HP at low RPM. You might be reading it wrong. In the M2 vs M2C graph: Solid blue --> M2C HP, faded blue --> M2C TQ, solid red --> OG M2 HP, faded red --> OG M2 TQ
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10-04-2018, 02:19 PM | #104 | |
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So M2 max HP at 350 HP, 400 for M2C Both below official numbers ... |
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10-04-2018, 05:34 PM | #105 |
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Thanks for the Dynojet numbers
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10-04-2018, 05:34 PM | #106 |
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10-04-2018, 06:39 PM | #107 | |
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Incidentally, this post's Dynojet run is not average for an M2 on 91oct. Most are no where near 350whp, rather averaging around 330whp - a very consistent average. 93oct will get you 5-10whp more. |
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10-05-2018, 12:29 AM | #108 |
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Believe it or not, I tend to think M2 OG stock actually makes a little more than the independent numbers first gotten in USA in summer 2016, which are low because M2 is sensitive to temperature like no other BMW.
Last winter, I myself organized a dyno day where a stock M2 sample put down 340whp, repeatedly, on RON98 on a low reading dynojet, the same day M4 ZCP showed only 397whp. In my opinion, 350+whp with RON98(AKI93) and 340 with RON95(AKI91) would be true numbers, corrected to STD, if your octane lives up to its rating, which is a big IF for middle and west USA. EAS number is a bit high (in fact the highest reported ever seen for a 91 M2), but still within acceptance range.
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10-05-2018, 05:21 AM | #109 | |
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10-05-2018, 06:26 AM | #110 |
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You may be looking at the peak value but look at the curve. There are points where the difference is 50 whp at a specific rpm. That is more important than looking at just a peak number. That's what I was referring to.
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