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      09-19-2014, 07:43 AM   #221

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Originally Posted by swamp2 View Post
Since you are obviously concerned with weight, and it sounds like the performance implications thereof, I ran a quick simulation for you.

In short, a loaded car with DCT significantly outperforms a stripper with MT (regardless of and small savings from CSiC brakes).

Let's say the difference is 217 lb even (not counting brakes) putting the lighter car with 90% fuel at 3400 lb even. Here are the results. The weight of M3 #2 on the right with M-DCT is exactly as posted here from the earlier post showing the scale weight, but adding fuel weight to get to 90% filled and including a 165 lb driver. The other, car #1 on the left is 217 lb lighter with MT. I am using 50 ms shift times for M-DCT and 300 ms shift time for the MT.

It is a significant besting, 0.7 seconds to 100, 0.2 and 2 mph for the 1/4 and 0.6 from 60-130. I realize this won't convince you to purchase the M-DCT, but she WILL be faster, period.

Note: Ignore the "M-DCT" and conflicting "MT" titles on car #1. It is 3400 lb with 90% fuel, without driver and has the correct shift times and transmission ratios for the MT car.
Does anyone know if there has been any real world tests with the 6MT.

If .7 to 100 is confirmed I think I'd switch my order to a DCT.
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      09-19-2014, 08:07 AM   #222
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Originally Posted by CSanto View Post
Does anyone know if there has been any real world tests with the 6MT.

If .7 to 100 is confirmed I think I'd switch my order to a DCT.
The Road & Track test data in their September issue is for a 6MT:

There are also a few European magazines that have published data for 6MT cars. Auto Motor & Sport here:

Do note that I beleive that there is a flaw in Swamp's simulation. I think he considers the same drivetrain loss for DCT and 6MT, which is not indicative of reality IMO. While I do believe a DCT car will be faster, it will not be faster by that much.

Last edited by CanAutM3; 09-19-2014 at 08:17 AM..
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      09-24-2014, 11:49 AM   #223

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Thanks for posting this. Good comparison between M3 and M4 visually. I must say, I'm really liking the look of the M3. In some why, the M4 looks plain from the side...
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dyno, eas, macht schnell, spacers, weights

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