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09-01-2007, 09:26 PM | #3 | |
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09-01-2007, 09:43 PM | #4 | |
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I mean im no engineer but i think they could have done better. |
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09-01-2007, 09:58 PM | #5 | |
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09-01-2007, 11:15 PM | #6 |
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Moderate peak torque means your drivetrain can be much lighter as the maximum stresses experienced will be lower and parts can be sized accordingly. Modereate torque is not an issue from a performance perspective as long as the engine can rev high and you are willing to drive at high rpms. Go check out the specs on F1 engines. If you are not an engineer, and don't understand why engineers do what they do, there is no point in saying you could have done better than BMW engineers. You are basically saying you don't know what you are talking about, but you can still do better. That doesn't make any sense.
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09-02-2007, 12:37 AM | #7 | |
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The second is that moderate torque with high horsepower in a fairly heavy chassis says that you'll address the issue (from an engineering standpoint) with aggressive gearing. Aggressive gearing can be great fun, but it brings with it a rotational inertia penalty that can be considerable, obviously more so in the lower gears, but really any time you're accelerating hard. That's probably a subject that deserves its own string, especially since it also affects shift points. OK, those are my nits for the day. Bruce PS - The guy actually could've done better than BMW engineers by simply ordering up a bigger motor, cc-wise - such as the 6.2 liter Merc V8. Oops. Did I say that? Been a bad boy again. |
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09-02-2007, 07:39 AM | #8 | |
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09-02-2007, 07:55 AM | #9 | |
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By the way, do you believe that the Merc engine is slightly lighter than the M3 engine as stated in an article that was posted here? (It was not clear how that measurement was obtained though). |
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09-02-2007, 08:08 AM | #10 | |
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09-02-2007, 12:37 PM | #11 | |
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Good post by the way. |
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09-02-2007, 01:03 PM | #12 |
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My understanding is that for the E46 CSL, they modified the intake, camshaft, exhaust valves, and the exhaust system to get 17 additional hp. Intake and exhaust mods are always possible and relatively easy to pull off. I also suspect they might raise the redline slightly to get a few more hp. They would also most likely modify the engine management software. It really doesn't look like they will use DFI on this engine for the E92s (South has written several posts saying the DFI technology BMW wants to use is not ready yet). And I doubt that they will increase the displacement. Actually, BMW has publicly stated that they care more about weight reduction than power increase in the E92 CSL. My personal guess is that it might get another 40-50 hp at most.
Last edited by lucid; 09-02-2007 at 04:39 PM.. |
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09-02-2007, 03:50 PM | #13 |
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09-02-2007, 04:37 PM | #14 |
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09-02-2007, 05:14 PM | #15 | |
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I have no good reason not to believe it. The M guys have a deserved halo, but Mercedes also knows a thing or two about engines, and as I've previously pointed out, this is the first AMG-unique design, so you know they were going for a home run. As it stands, they've already rounded third and are pounding toward home, and the BMW throw hasn't quite reached the cutoff man yet*. These are exciting times. Bruce *As an aside, although baseball is a pastoral and slow-moving game, I personally believe the throw home is the most exciting play in all of sports. |
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09-02-2007, 05:22 PM | #16 |
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Yes, DSC off, it will likely have as much wheelspin as your right foot wants. Finding the right launch RPM is going to be key! I could spin them easily on my Z4MC with just a 3500 rpm blip before takeoff! In fact that's how I "lost" to a 335i
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09-02-2007, 08:07 PM | #17 |
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09-03-2007, 08:43 AM | #18 | |
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However, from initial reports, this engine will be a winner. BMW has gone to great lengths to make sure this engine is lively in everyday driving, including top-gear flexibility. Although they seem to have sacrificed a little in terms of peak torque (down perhaps ten or fifteen pound feet from what it could be), this was done in favor of an extremely wide torque curve. Consider that, even though it makes more power per liter than its parent engine, the torque peak is way the heck lower at 3900 rpm, vs 6100 for the V10. Yeah, I can't imagine anyone not liking more torque, but this engine will not be a weakling in everyday driving, even at fairly low rpm. Bruce |
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09-03-2007, 11:42 AM | #19 |
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09-03-2007, 11:44 AM | #21 | |
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