Quote:
Originally Posted by JoeFromPA
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So I'm looking at a U.S. spec M3 (sedan) with a mostly empty fuel tank and probably an option free weight south of 3400 pounds.
That's just my guess, but that's pretty nice.
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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.