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01-30-2013, 11:34 AM | #89 |
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Yup! It just looks good. Any amount of kg to be saved is a + !
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01-30-2013, 12:05 PM | #90 |
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These days car manufacturers are doing everything they can to save weight to increase performance. All types of performance; acceleration, braking, cornering, and fuel economy. Don't forget that the M3's fuel economy is used in the corporate average and there are some regulations/taxes that kick-in if certain numbers are exceeded. In Canada if the fuel economy is >= 13L/100kms then a minimum $1000 tax has to be paid. Fortunately the M3 officially comes in just under that (12.7 I believe) so no additional tax. Yippee! I going to guess that BMW used the CF roofed cars to come up with their fuel economy numbers.
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01-31-2013, 04:41 AM | #91 |
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When I fill the car from from empty it's about 16 gallons. So from full to 1/4 tank is 12 gallons. Gas weighs about 6 pounds a gallon. 12 gallons x 6 lbs/gal = ~70 lbs. I don't notice the weight difference from full to a 1/4 tank, in this car. However, I have no doubt that a lighter M3 is faster, more agile, and has better fuel economy.
Has anyone done a 1/4 mile run with a full tank vs an empty tank back to back? |
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01-31-2013, 07:37 AM | #92 | |
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01-31-2013, 07:44 AM | #93 | |
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I do not believe CF roof's M3 have significantly better handling comparing to the ones with moon roof. |
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01-31-2013, 07:53 AM | #94 |
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The option to own a car with a CF roof in the entire US car market is so limited I see no logical reason to opt for the sunroof. Beyond weight, aesthetics, etc. this option adds a tremendous amount to making this car more on par with its more exotic counterparts.
As a side note, the last 6 cars I've owned prior to the M have all had sun roofs (including a panoramic on our Q7), and I think collectively I've opened them less than 20 times. Carbon is King!! :-)
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01-31-2013, 09:47 AM | #95 |
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Never understood the allure of a moonroof. My previous car had one standard.
-- On sunny days, I have to slid the cover over it to avoid having my scalp burned -- On windy days I can't open it because just the sound gives me a headache -- It's useless on cold winter days -- Can't open it on hot days since I will use the A/C to cool down -- If you forget to close the roof, some assh*le will probably throw a cigarette inside (happened to two people I know) Therefore out of 365 days, there'll probably be 10 ideal days for its use. Yay! So much for practicality. Like someone mentioned earlier, the CF is lighter, lowers the CG, costs $$ (which u get for free), and looks damn cool! Its one of the things that sets the car apart. Moonroof...pssst Last edited by WRXXX; 01-31-2013 at 10:02 AM.. |
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01-31-2013, 11:01 AM | #97 | |
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So, over say, a quarter mile, the carbon fiber car will gain close to a half MPH, and drop around a half-tenth in ET, or around half a car length. The half-tenth ET gain is suspect because the moonroof car will perhaps get a slightly better launch due to a weight transfer advantage. On track, the acceleration advantages will occur on every straight. I don't know how to quantify weight-transfer disadvantages in cornering. Bruce |
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02-02-2013, 12:26 AM | #98 |
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I like the CF roof but not for any performance advantage reason. Simply, I think it looks more interesting. However, with today's new ways to change the look of the paint, I probably will take a sun/moonroof again and have the entire roof wrapped in the color texture I want.
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02-05-2013, 02:01 PM | #99 |
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I'll be pissed if the new M4 doesn't have a sunroof as an option!
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02-05-2013, 05:48 PM | #100 |
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that is the least of our worries. i have new 3 series in the drive and its a turd. not sure how they are gonna polish it.
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02-05-2013, 06:36 PM | #101 |
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02-06-2013, 05:10 AM | #104 |
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An M3 CF roof is on my to-do-list. 45lbs weight reduction at the highest point of the car will clearly be felt on the track.
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02-06-2013, 07:15 AM | #105 |
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Something to think about:
The discussion in this thread is interesting. Especially when doing a parallel with the new M3/M4 threads where it is all about how the new F8X M3/M4 will be lighter by about 200-300lb. The big argument on the F8X M3/M4 is about how much better it will perform despite it having the same power output as the E9X because of its lighter weight. The moonroof is 45lb more compared to the CF roof. That is 15-25% of the weight saving the F8X will get over the E9X... |
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02-06-2013, 06:46 PM | #106 | |
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02-06-2013, 06:53 PM | #107 | |
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It was about the contradiction. In one thread 200lb make the world of difference on how the new M will perform. And in this thread, where 45lb does not make a difference at all . |
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02-06-2013, 08:24 PM | #109 |
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You should read some of the auto news articles on the amount of light weight metals that are being used in car construction these days. For one the new Porsche Boxster. Amazing amount of aluminium and magnesium. Also, the manufacturers are glueing (not wleding) many of these different metals pieces together. I'm not surprised to see those numbers being discussed. Bigger, lighter, more power = better performance.
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02-06-2013, 09:16 PM | #110 | |
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