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10-03-2012, 01:30 PM | #441 | |
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You impress me that you are taking an interest in Turbo charging ![]() ![]() Unfortunately the cross bank only works with V8's a V6 would not work any better than how the twin scroll works on the current N55. Nice you've also discovered how balanced an I6 is, absolutely naturally balanced. |
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10-03-2012, 02:52 PM | #442 | |
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The cross bank idea is combined with a twin scroll. Both contribute to less lag. You can find pretty old postings here on this forum with me discussing various engine configurations and their balance properties...
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10-03-2012, 02:57 PM | #443 | |
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The heads indeed can be a huge part of turning an ordinary engine into a much more special and high performance one. The M3/4 will undoubtedly have a heavily modified or entirely different head. I am not so sure it will require different internals such pistons, rods and crank. The cost/volume side of the equation leads me to believe those will be common.
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10-03-2012, 03:03 PM | #444 | |
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![]() ......with CSL lightweight bits on of course. |
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10-03-2012, 03:10 PM | #445 | |
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10-03-2012, 05:16 PM | #446 |
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Out with the old, in with the new.
I was looking forward to getting the V8 M3 Sedan in a couple years but right now I'm a bit sad its just a reworked/revamped V6 335 engine. Not that there's anything wrong with the N55 engine...I'm sure it will be faster and more fuel efficient etc, than the outgoing M3 (as it should be) but I LOVED the way that V8 sounded. ![]()
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10-03-2012, 05:43 PM | #447 | |
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10-03-2012, 05:51 PM | #448 |
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Thanks for the heads up, I guess I'm confused because the first post of this thread says it'll be an inline 6. The video sounded like a 6 too unless I need to check my hearing. I haven't read most of the thread yet, time to do some skimming.
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10-03-2012, 07:10 PM | #449 | |
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10-03-2012, 07:47 PM | #450 | |
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Okay, I'm done interfering and geeking out ![]() |
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10-03-2012, 09:31 PM | #451 |
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Thx for the clarification. I do realize itll be an inline 6 just like the 335. Was just commenting on how it sounds. If the vultures' only food source are people who say v6, they'll surely starve.
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10-03-2012, 10:53 PM | #452 | |
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10-03-2012, 11:12 PM | #453 | |
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10-04-2012, 03:31 AM | #454 | |
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Cast cranks have made a bit of a resurgence, think it's down to a new process that reduces the porosity. |
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10-04-2012, 10:24 AM | #455 |
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10-04-2012, 11:35 AM | #456 | |
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![]() You're the V6 vulture Carl warned me about. SHOO!!
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10-04-2012, 01:30 PM | #457 | |
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Despite process, with a similar design, I doubt there is any way to get the same consistency, yield strength nor fatigue resistance from a cast product.
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10-04-2012, 03:50 PM | #458 |
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SORRY, but if the engine specs in this thread are correct ... and I think they would be, than that would be very bad news - engine wise ... torque increase but no hp-increase means that it only counts to make the engine as cheap as possible
![]() An torque increase is an easy thing in the case of an turbo engine, but if they really cancel the planed/promised power increase to at least ~450hp that means that there is simple no more growth potential in the chosen N55 based I6 ... if there would be this potential I am to 100% shure the engine would have no less than 450hp !!! ![]() Since my infos say clearly that the new S55(?) would be nearly in the same weight class of the S65 ... which the better end for the V8(!) ... it make for me no really sence to drop the great S65 for the S55(?) - performence wise not cost wise(!) ... I am 100% certain that with the better packing and even lighter N/A V8 in the overall F8x would perform even better and would be much moreo fun to drive (with an only slightly worse mpg number!) ... M3s were never high low-end-torque cars but yet in als cases better than all competitors ... they were real race cars in an coupe/sedan outfit never torque monsters !!! ![]() Looks as if the BMW AG prepared from pure profit reasons to sacrifice almost everything that has identified a previously M3 ... the new M3 is from the motor point of something completely different than we are used to - more boring surfing on the torque wave as spontaneous biting revving -> more 335i than just a real M3 driver and fan can be right. The rest of the car seems to be as great as expected ... agressive sporty styling and much lower weight ... seems as I should look if I can get an nearly new S65 from ebay and go to Manhart to get the real exciting new M3. ![]() Greets Uli_HH Last edited by Uli_HH; 10-04-2012 at 03:55 PM.. |
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10-04-2012, 04:11 PM | #459 | |
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On the turbo sizing front, that is quite a small turbo for a 3litre engine, a big (not that big) single capable of 450hp will come on boost by 2500rpm quite easily on it's own. A twin turbo system much lower. Really hope BMW aren't focussing on a 'no lag' approach sacrificing high rev punch. If so they may as well change the M3 into D3 and fit it with a diesel engine (330D produces 413ft.lb of torque). ![]() |
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