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11-26-2013, 10:23 AM | #23 |
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The redline being 7800 rpms and the statements of torque increase over s65 at 2000 and 7500 rpms are new and specific interesting tidbits for me...
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11-26-2013, 10:56 AM | #24 |
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11-26-2013, 11:02 AM | #25 |
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11-26-2013, 11:05 AM | #26 | |
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Quote:
http://f80.bimmerpost.com/forums/sho...d.php?t=893611 |
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11-26-2013, 11:15 AM | #27 |
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I just did a rough measurement based on the original of the picture attached.
The bore is definitely larger than the stroke if we can go by the picture, but I haven't done a precise enough measurement to get a reliable ratio between bore/stroke. |
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11-26-2013, 11:53 AM | #29 |
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11-26-2013, 11:59 AM | #30 |
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Autoweek states the exact same bore x stroke as the 1M and the piece in this post. The 80 mm bore above is obviously a typo and should be 84.
http://www.autoweek.com/article/2013...NEWS/130929883 That article also talks about a more than 200 lbs lighter CSL being considered with lightweight seats etc. I think Scott26 has hinted at this as well. Last edited by solstice; 11-26-2013 at 12:14 PM.. |
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11-26-2013, 12:24 PM | #31 |
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@solstice
Good article, hadn't seen that one mentioned before. Unfortunately there is so much conflicting information that we won't be able to call any of it fact until BMW makes it official. |
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11-26-2013, 12:24 PM | #32 | |
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11-26-2013, 12:30 PM | #33 |
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I agree that as a community or fact source we need the official fact sheets to call it but two sources stating Biermann with the standard BMW I6 numbers and references to the 1M with that the S55 share only bore x stroke plus a few others is enough for me personally, i.e I believe the S55 has the same bore stroke as the standard I6s of 84 x 89.6
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11-26-2013, 12:57 PM | #34 |
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11-26-2013, 02:13 PM | #35 |
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11-26-2013, 03:54 PM | #36 | |
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http://f80.bimmerpost.com/forums/sho...d.php?t=893611 The Engine Tech International article also mentions 80/89,6mm but has got it backwards and has the 80mm stated as the bore. That equates to a volume of 2,7l, so definitely not correct. It either has a 80mm stroke and 89,6mm bore or a 89,6mm stroke and 84mm bore. From the photo I posted the bore is definitely larger than the stroke, but hard to verify as being correct due to angle of the engine on the photo etc. |
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11-26-2013, 04:14 PM | #37 |
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40% more torque at 7500rpm would be 530~555hp, at least much more than 430 - I highly doubt that.
Also, at 2000rpm it seems to be much more than 70% more torque. More like 230%. Last edited by Kadema; 11-26-2013 at 04:31 PM.. |
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11-26-2013, 04:19 PM | #38 | |
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11-26-2013, 04:37 PM | #39 | |
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11-26-2013, 05:07 PM | #41 | |
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It is a all new block and that is also visible from the photos. However if that means a new bore spacing and 89,6mm bore is a different matter. But according to Biermann the engine shares nothing apart from some ancilliaries with the N55, so who knows? BTW did you find the info on 80% unique components on the E9x M3 that we discussed on the other thread? |
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11-26-2013, 05:12 PM | #42 |
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Edmunds has the same numbers and possible mistake. From reading a few of the articles from different sources I wonder if there are only two conflicting sources that has been copied by the others. Here's Edmunds piece that matches this post:
"Weighing 452 pounds fully dressed, the engine is 22 pounds lighter than the V8 it replaces, even with its pair of Honeywell turbochargers and indirect intercooling system attached. The two turbos generate around 18 pounds of boost pressure, which is then fed through the intercooler into chambers with an 80mm bore and an 89.6mm stroke." http://www.edmunds.com/car-news/2014...-revealed.html |
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11-26-2013, 05:17 PM | #43 | |
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Here Biermann is quoted as saying that the S55 shares bore and stroke with the 1M engine... Meaning a 84mm bore and 89,6mm stroke... We will have to wait and see... http://skiddmark.com/2013/09/bmw-rev...-m3-m4-wvideo/ |
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11-26-2013, 05:30 PM | #44 | |
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