02-01-2015, 11:10 PM | #2 |
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M5 was the first ///M car that did that. In general, a solid connection of the rear tires to the frame gives less wiggle under cornering, making the trajectory more predictable. It also transmits more of the road to the driver's butt. Probably why most folks like the adaptive suspension on this car.
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02-02-2015, 08:46 AM | #3 |
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The rigidly connected subframe acts as a stiffening element, similar to some of those bolt on units you see for sale on other vehicles. By rigidly connecting the rear end together, it increases the overall and torsional rigidity of the rear shell
Downside, of course, is increased NVH. The diff, usually bolted directly to the subframe, is isolated with bushings, so that helps some. But it does transfer more NVH since it still carries the suspension. |
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02-02-2015, 09:44 AM | #5 |
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I love this aspect. Car feels more track oriented out of the box. I have the standard suspension. Wouldn't recommend that for the feint of heart...
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02-02-2015, 08:56 PM | #6 | |
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02-02-2015, 10:24 PM | #7 | |
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02-03-2015, 06:57 AM | #9 |
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great video!!!!!! thx
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02-03-2015, 07:11 AM | #10 |
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Every time I watch this video, I get a kick out of how passive the other watchers are. Some are checking their phones, no one is engaging with questions, they just stand there like statues. Were I in the presence of such a person and such a car, I guarantee that I would not stand there mute.
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Loreley 2015 / //M3 6MT SO over full SO, Exec,Susp & Lighting, HK & Blk 19's - ED 15 May 2015, Redelivery 23 July 2015 My photography: WWW.PBASE.COM/VONMAYR My ED Adventure http://www.vonmayredadventure.blogspot.com |
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02-03-2015, 09:45 PM | #11 |
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Actually, it's only partly about stiffening the structure. Mostly it's about removing the lateral compliance from the rear suspension to improve the precision and directness of the rear of the car under lateral load and in transients. Less compliance laterally means the steering response of the rear matches the front better with less delay, and you have a better feeling of what's happening at the contact patches.
This also helps the drivetrain . . . the driveshaft has to first take up any compliance of the rear suspension before it can transmit torque to the rear tires. Less compliance means a more responsive powertrain, which allows the engine itself to be tuned for better response.
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