04-12-2016, 08:38 PM | #67 | |
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Like 35 days ago.. |
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04-12-2016, 08:43 PM | #68 |
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04-12-2016, 08:47 PM | #69 |
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3 different variants of the N54 :
https://en.wikipedia.org/wiki/BMW_N54 They only differ in software. You can have completely different curves (HP and Torque) just by playing with air flow and fueling along with target boost. You guys claim to know engines and insist there must be a real HW difference. 740 used the same engine as the 1M.
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04-12-2016, 08:50 PM | #70 | |
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@Nine lives posted the entire info in this thread and it raged into closed deck but the key is " M2s turbocharger is integrated into the exhaust manifold " - the turbo part number was found to be different a while ago - the Dyno chart post by BMW shows a higher revving top end - the only way to improve on the M235 would be via displacement , software , or a new turbo and we know that displacement isn't it and we know that n55 didn't have that much headroom to make such a big jump in power from 332 to 370 hp with software alone. - finally , test drivers are referring to the better, snappier throttle response I'm sure some will continue to doubt reality until a tuner says something or we see the parts side by side : |
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04-12-2016, 08:57 PM | #71 | |
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04-12-2016, 09:07 PM | #72 | |
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04-12-2016, 09:23 PM | #73 | ||
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An M brand manager did once say " no more dogmas" ... |
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04-12-2016, 09:54 PM | #74 | |
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Some have wondered why no "S" denotation with the many S55 parts used in the motor. |
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04-12-2016, 11:19 PM | #75 | ||
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The 7th and 8th position is used to denote power level of the engine and BMW has a letter combination that describes this. But if they had used a S55 block I agree with you that it would have made more sense to call it a S55B30xx (don't have the key to the combination here right now) |
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04-13-2016, 12:48 AM | #76 | ||
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It's only on the BMW USA website it's mentioned. A website that also had wrong information when the F8x M3/4 was released AFAIK... I prefer to rely on the German BMW hq and M info available... |
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04-13-2016, 12:54 AM | #77 | ||
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04-13-2016, 01:14 AM | #78 |
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I would be hard pressed to believe that this is an S55 block.
I do recall early in some tech interviews M saying that the original idea was to stuff the F8x M3/M4 S55 into the M2, but the bill was too high, so they had to scale back a touch. The block would almost certainly have been too expensive to fit within the price point. My guess is that we have an improved intake, exhaust/turbo combination (maybe only to support overboost), S55 pistons to take the extra boost pressure, and a tune to suit. That's probably about it. I'm also not of the opinion that a non-S series engine makes it a lesser M, any more than the North America E36 M3 was a lesser M because of the S52. These arguments get ridiculous. I don't see anyone saying the 1M isn't an M because it uses the N54. Then again, I don't hang around forums much, so maybe people were saying that at the time. |
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04-13-2016, 04:58 AM | #81 |
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04-13-2016, 05:04 AM | #82 | |
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04-13-2016, 07:27 AM | #85 | |
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04-13-2016, 07:45 AM | #86 |
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Slow news day...really who cares? This info will not change people from wanting to buy this car or not. Tomorrow's headline it turns out that the n55 engine used longer screws than the n54....
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04-13-2016, 07:49 AM | #87 |
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Yes, but again, those sources SAY NOTHING. That is NOT the same as those sources saying it's an open block.
You can't make that logic leap. We have no conflicting information. The only sources that specify the configuration of the block all say the same thing. You have nothing to rely on.
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04-13-2016, 07:59 AM | #88 | ||
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Edit, covered above. That's perhaps more telling. The standard N55 turbo is seriously running out of steam early in the rev range. Quote:
But you wouldn't have both. If the turbo is larger, it would have more lag, and slightly worse throttle response.
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