01-18-2021, 09:47 PM | #133 | |
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01-18-2021, 09:59 PM | #134 |
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R888R are the only tires I've thrown away at half tread. I don't know what those tires serve for but at the track they were much slower than RE71s, loud as hell, bad in water... i guess they have a use somewhere but wow
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01-18-2021, 10:00 PM | #135 | |
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Looking at the G20/22 specifications it’s interesting to see that I6 move the scale 1% forward vs the I4 and Xdrive shift it another percent. |
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01-19-2021, 06:04 AM | #136 | |
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For some reason BMW chose the imprecise star designation for all their specific tires. Other manufacturers choose to use a combination of numbers and letters which makes it clearer what specific vehicle application the tires were designed for.
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Porsche 911 turbo 2021 992 GT Silver
Previous cars: M4cs 2019 F82 Limerock Grey / M4 2015 F82 Silverstone / M3 2008 E92 Silverstone / M3 2002 E46 Carbon Black Last edited by CanAutM3; 01-19-2021 at 08:01 AM.. |
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01-19-2021, 03:19 PM | #137 | |
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The trick they use since ever, is pushing the engine as much as possible to the center of the car and moving some periferals like the battery to the back. With their longitudinal RWD driveline architecture they can also push the transmisson to the center of the car while a transversal config has it installed at the same position as the engine. Of course, you would like to concentrate the weight as much as possible between the axles, but you still need some interior space. Nonetheless, why would they destress this USP now? Is it that customers more value the 0.4 inch of added interior length? |
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01-19-2021, 04:11 PM | #138 | |
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01-19-2021, 04:35 PM | #139 | ||
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The G82 M4 Coupe has 52,7/47,3 The G82 M4 Comp has 53,1/46,9 (auto trans) The F82 M4 std had 52,8/47,2 The F82 M4 GTS had 52,9/47,1 Yes, the G8x carries more weight on the front axle due to higher curb weight (although not as much heavier than the F82 if optioned right). But the weight distribution is pretty similar to the F82... By comparison the Audi RS4/5, which suffers from "Audisteer", weighs 1805/1740kg and has a 56,3/43,7 (RS4) and 58,2/41,8 (RS5) weight distribution. To put that in perspective: The RS5 weighs 1013kg on the front axle The M4 manual weighs 916kg on the front axle, or in the case of the "lightweight" version from the first video, 882kg The M4 Comp weighs 935kg on the front axle The F82 weights are taken from Sport Auto Supertests and are based on tested weights. The G82 weights are taken from the tech sheets from BMW posted on Bimmerpost. |
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01-19-2021, 06:07 PM | #140 | |
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01-19-2021, 07:00 PM | #141 | |
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F82 6MT -> G82 6MT RWD 52.1/47.9 -> 52.7/47.3 2 F80 DCT -> G80 8AT RWD 52.2/47.8 -> 53.1/46.9 The shift is in 0.6% to 0.9% range depending on model and transmission. And I am even using the AM&S data for the F82 6MT, as the BMW official press release numbers were much better at 51.8/48.2. While not drastic, it is a progressive shift we have been seeing with every generation with more and more weight on the front axle. Expect the AWD version to make it even worse. Now if you do the math to figure if it is meaningful or not: the 6MT, the G8X carries 117lb of its extra 181lb (65% of it) on the front wheels.
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Previous cars: M4cs 2019 F82 Limerock Grey / M4 2015 F82 Silverstone / M3 2008 E92 Silverstone / M3 2002 E46 Carbon Black Last edited by CanAutM3; 01-19-2021 at 07:39 PM.. |
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01-19-2021, 07:01 PM | #142 | |
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01-19-2021, 07:09 PM | #143 | |
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The F8X are easy to dog out, look for yourself: https://f80.bimmerpost.com/forums/sh...d.php?t=923444
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01-19-2021, 07:13 PM | #144 | |
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The F8x, I fell in love with for all the right reasons, but this G8x thing is really hard to understand since it seems to provoke all known virtues of the M brand we knew. Grrrr... These moronic video clips aren't really helping, it's all about the bells and whistles, like tires and seats, and NOTHING about the core. Last edited by KoenG; 01-19-2021 at 08:41 PM.. |
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01-19-2021, 08:15 PM | #145 | |
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01-19-2021, 08:16 PM | #146 | |
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A lot more work went on the G80 to make sure everything is balanced out, well I hope so..
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Past:2023 M4 CSL, 2022 M4C Vert, 2020 M340i, 2018 M2, 2015 M235i, 2008 135i 550whp Daily: 2023 X5 45e Daily/Family: 2021 Atlas Cross Sport 3.6 |
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01-19-2021, 08:26 PM | #147 | |
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01-19-2021, 08:44 PM | #148 |
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The G20 press release have a lot of information on chassis improvements over the F30. Its worth reading to understand that the G8X do not only inherit a heavier, larger platform. There’s a lot of good stuff in there as well.
https://www.bimmerpost.com/goodiesfo...w-3-series.pdf |
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01-19-2021, 09:47 PM | #149 | |
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Do you have any comment on the reason for the skidpad difference between the M340i RWD (0.96g) vs the M440i xDrive (0.91g) with both having the same PS4S specs despite the M440i xDrive having a “sportier” built (lower and wider track)? https://www.caranddriver.com/reviews...y-maintenance/ https://www.caranddriver.com/reviews...y-the-numbers/ "Even with 19-inch Michelin Pilot Sport 4S summer tires (18s with all-seasons are standard), it managed only 0.91 g of skidpad grip, and understeer dominates."
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01-19-2021, 09:52 PM | #150 | |
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Another is that the M440i is a mild hybrid with extra weight. The rest could possibly be test environment differences, temperature, state and wear of tires etc. I wouldn’t be too concerned about it as a general 3 vs 4 apples to apples specification characteristic. Last edited by solstice; 01-19-2021 at 09:57 PM.. |
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01-19-2021, 09:56 PM | #151 |
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Yes, difference of 159 lbs with more weight at the front of M440i xDrive; worse skidpad reading despite it being "sportier" built.
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01-19-2021, 10:00 PM | #152 |
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01-19-2021, 10:01 PM | #153 | |
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Edit: I was taken in with the "pom poms" and posted on this.
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01-19-2021, 10:24 PM | #154 |
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Absolutely agree, you need to filter out the Pom poms and focus on the objective changes/improvements.
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