11-29-2020, 12:13 PM | #45 | |
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To recap: 50-50 weight distribution is not ideal, contrary to what BMW wants us to believe. Rear weight bias is preferable for sport driving dynamics. 53% front weight bias for the G8X is certainly not going in the right direction. And yes, the AWD G8X will be even worse with 54-55% of its weight on the front axle. The RS4's 56% is even worse. And in case you wonder, yes those % points are all significant in terms of driving dynamics. That's the whole point of my post. And I am not an Audi hater, quite the contrary, we've had an S or RS Audi in our driveway for the last decade. My wife has a deposit down for a 2021 RS6. We are actually moving away from BMW as my next purchase will not be an ///M.
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11-29-2020, 12:46 PM | #46 |
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The F90 has 54.4% weight on the front axle. As CanAutM3 note the G8X AWD is likely to be very similar to that number. The G8X adding significant front track and rubber to the road vs. the F8X should help counter understeer. To what degree? We’ll have to wait 6-8 months to see.
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11-29-2020, 01:15 PM | #47 |
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I don’t know if anyone here is an F1 fan but if any of the new weight is contributing to a safer car, I’ll gladly take it.
The miracle engineering that saved Grosjean’s life today, how is that even possible for a human to survive that? |
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11-29-2020, 01:41 PM | #48 | |
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225/255 E46 245/265 E9X 255/275 F8X base 265/285 F8X comp/CS/GTS 275/285 G8X base /comp
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11-29-2020, 01:45 PM | #49 | |
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Also significant and unusual aren’t the same thing, it can be typical and still be significant Last edited by solstice; 11-29-2020 at 01:52 PM.. |
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11-29-2020, 03:22 PM | #50 | |
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11-29-2020, 04:57 PM | #51 | |
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What further make me optimistic is that the majority of the preproduction car drivers singled out the front axles better bite when compared to the F82 competition. It is likely the main reason is improved front end tire grip. More front end grip should result in reduced understeer at the same speed. At the edge there could still be more understeer than the F8X but that will be at a higher speed than the F8X is capable of. Last edited by solstice; 11-29-2020 at 05:30 PM.. |
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11-29-2020, 05:29 PM | #52 |
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Where this discussion of front/rear balance become really interesting is the two opposite measures taken.
- The staggered width is reduced which increases front grip bias. - Staggered diameter is introduced increasing rear grip bias. So why are they introducing the staggered diameter on this car which by specifications should have understeer tendencies? That is a nice little mystery |
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12-02-2020, 01:59 PM | #53 |
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I agree. BMW makes a terrific vehicle. Design is the current hangup--IMHO.
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12-04-2020, 07:10 AM | #54 | |
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12-04-2020, 10:48 AM | #55 |
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Exactly. Wider front tires and the help from the staggered diameter. It’s too early to jump on the negative impact of the shift in weight balance.
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12-04-2020, 10:52 AM | #56 |
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More weight on the front is bad regardless what measures are done to try to counter the effect. Our RS3, has 255 front and 235 rear from the factory to offset the weight distribution, it helps but it does not alleviate the fact the it is nose heavy. For instance, it destroys its front tires on track in no time.
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12-04-2020, 11:11 AM | #57 | |
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Last edited by solstice; 12-04-2020 at 11:23 AM.. |
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12-04-2020, 09:23 PM | #58 |
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I suspect the rears will be a limiting factor at 285, the front will have tons of grip. It will be an absolute hooligan out of the box I think with those torque levels. It will be fast around a track, in the same way an M8 is fast. Tons of mechanical grip, with big power controlled by a trick differential and clever electronics. Its going to absolutely lunch consumables and the AT gearbox will probably overheat with sticky tires, but no question its going to have serious pace.
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12-04-2020, 09:28 PM | #59 | |
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12-05-2020, 01:05 PM | #60 |
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Not only in Europe. PSC2 are also offered an as option on the G8x in Canada
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12-21-2020, 09:00 AM | #61 | ||
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It's now basically a two-ton car in the top M440i xDrive trim, with our test car placing a substantial 53.8 percent of that mass on its front wheels. 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. The readout showed 53.8 percent of this car's nearly two-ton mass was positioned over the front axle. This certainly contributed to the M440i's poor 0.91-g skidpad result, the worst we've ever achieved in a Michelin Pilot Sport 4S–shod car.
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12-22-2020, 11:55 AM | #62 | |
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The F90 pulls a 1g with over 54% weight on the front axle. I expect the G8X to do a bit better than that. |
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12-22-2020, 05:01 PM | #63 |
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///M will definitely work its magic on the F8X chassis. But physics is physics and one can only wonder what it could have done with a more favourable weight distribution.
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