01-13-2021, 08:53 AM | #133 | |
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01-13-2021, 10:16 AM | #134 | |
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01-13-2021, 03:44 PM | #135 | |
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The CCBs are advertised as 42.8 lbs lighter according to the link posted. In this case the contribution of the CCBs are more effective than the lighter wheels. All I am saying is the gyroscopic effect can't be measured in a vacuum like that. You have to compare the change in weight of the brakes vs the change in weight of the wheels. Granted, in a vehicle with much heavier 35lb wheels going to a super light 15-18lb race style wheel, the effects of the wheel will be more pronounced, but since this is the M2 forum, I used M2 data. |
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01-13-2021, 05:38 PM | #136 |
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I think you totally missed the entire point of my (correct) post....
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01-13-2021, 05:56 PM | #137 |
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01-13-2021, 07:00 PM | #138 |
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The weight savings on the CS CCBs is 55lbs, now considering that the absolute majority of that weight savings is spinning in the 14.5 inch range or 7 inch from center of rotation, it's pretty substantial.
Now where is the weight reduction happening on a set of lighter wheels? Is it primarily in the drum at 18 inches 9" from center or in the spokes at 9 inches 4.5" from center or hub at 3 inches. Worth considering |
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01-13-2021, 08:29 PM | #139 | |
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01-13-2021, 09:13 PM | #140 |
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01-13-2021, 11:47 PM | #141 | ||
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01-14-2021, 12:18 AM | #142 |
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Next controversial topic: inflating tires with helium.
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01-14-2021, 04:00 AM | #143 |
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01-14-2021, 06:04 AM | #144 | |
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I would more think that one would enojy the total unsprung weight reduction of the wheel and CCB disc combination...something like on track in a bumpy (high frequency bumps) 70 mph sweeper taken at the limits (M2C with 788M and 2NH, and M2 CS with 763M and CCB; same tires). Something like turn 10 at Summit Point (at least in the old days) would be a great place to see how nice a big reduction in unsprung weight feels.
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01-14-2021, 06:35 AM | #145 |
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No you didn't. The point I was making is that in the car industry (especially advertising) simply referring to "rotating mass" changes is commonplace and without the context of radius gyration and actual calculation of moment of inertia changes, there is no basis for valid comparisons (or advertising) although the vast majority of people assume "rotating mass" is all the same. The car makers know (clearly) and exploit that lack of understanding intentionally.
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01-14-2021, 07:20 AM | #146 | |
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02-04-2021, 08:53 PM | #147 |
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Bumping this up instead of creating a new thread.
I remember this from the Corvette guys, figured it's an idea worth sharing since I'm sure all CCB owners have thought about how to most carefully remove wheels. Personally I don't think I would ever make this effort (even though it's cheap and easy), just use lug extenders. https://www.corvetteforum.com/forums...-s-manual.html |
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02-06-2021, 09:36 PM | #148 |
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Not sure if this was mentioned, but the consumables warranty add on doesn’t include carbon breaks.
I did opt for the add on for 4 years, since it covers a lot and I plan on tracking and they said NBD if I track it. Though if I damage the wheels at the track (or construction zone) they’re not covered but the finance guy literally told me he has it and just lie no ones will follow up. Never got the warranty before, but I curb the shit out of wheels, and the price of just 2 rims or 1 set of breaks covers the cost right there. No deductible. Was going to make another thread actually to see if anyone else is getting the extra coverage. Maybe it’s a scam, but my friend swears by them on his X5 he upgrades every few years. Especially with NY roads with potholes, nails, glass chips, vandalism etc.
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