02-23-2014, 10:34 PM | #89 | |
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Although I am having second thoughts, I will still likely end up with a DCT. I am just more and more pissed about how it got compromised compared to the 6MT I guess this thread is me venting , I need a couch Last edited by CanAutM3; 02-23-2014 at 10:44 PM.. |
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02-23-2014, 10:36 PM | #90 | |
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Your certainty may be misplaced. There is simply no way to know for sure until people actually get to drive the new cars. Also, if the F8X 6MT and DCT are at all close on a track, that probably speaks more to the flexible powerband of the S55 (making the manual easier to drive since being in the optimal gear is less important) than a failing of the DCT. |
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02-23-2014, 10:42 PM | #92 |
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The corner before the back straight is a long double apex 180degree turn. I was right up his butt trough the entire turn more than once. So yes, exit speed was very similar (as I mentioned, we were running the same wheels and tires).
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02-23-2014, 10:44 PM | #93 |
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02-23-2014, 10:46 PM | #94 |
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Good for you. I grew up driving manuals but when I moved to a huge city I became sick of the constant plunging of my left leg. The arrival of DCT was a huge boon as it fills the gap for the many former stick drivers who are in this camp but find regular autos too disconnected.
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02-23-2014, 10:49 PM | #95 |
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Very true. I couldn't tell the difference at all. The E60 M5 I drove felt very similar, shifting wise, to my friends E92 M3. I do still feel dumb for saying it was DCT, but I only figured out it was SMG III by reading up. Oh well.......shit happens.
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02-23-2014, 10:51 PM | #96 | |
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I was trying to say SMG in M5 was not bad at all, E46 was crap I agree E60 SMG was very good but had a driving curve to it. |
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02-23-2014, 10:53 PM | #97 |
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Yeah I read where you corrected your statement. Hey man, we all make mistakes. Just ask gee-m-w, he hasn't gotten more than 25% of his posts right from the get go, so no worries!
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02-23-2014, 10:54 PM | #98 |
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All good bud, and props for admitting it rather than BSing. Sold my M5 as SMGIII was so undriveable in auto and it became the wife's daily...and she can only drive in auto mode despite my efforts. Great fun in manual mode at WOT though, like thunder.
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02-23-2014, 10:56 PM | #99 |
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The SMG III in the E6X M5/6 was specifically designed as an SMG. The odd shift patterns of the 7 speeds would have been impossible to use as a standard MT. It was much less of a compromise compared the the SMG I and II that were standard 6MTs with servos added.
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02-23-2014, 11:01 PM | #100 | |
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While much better than the second iteration, SMGIII was quickly outdated once DCT hit the mainstream and it remained the weakest link of a fabulous car in my opinion. |
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02-23-2014, 11:05 PM | #101 | |
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Wow third is 2.153 on E90 DCT vs 1.701 on F80 but wouldn't that be the case with the E90 to keep rpm higher because of such a high power band? |
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02-23-2014, 11:11 PM | #102 | |
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6.791 for the E9X and 5.869 for the F8X. |
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02-23-2014, 11:13 PM | #103 |
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02-23-2014, 11:13 PM | #104 |
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02-23-2014, 11:29 PM | #106 |
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CanAutM3, if revs are brought down to 4100 in 2nd and 5000 in 3rd, I'm pretty sure that doesn't hurt performance at all, because torque at the wheels will still be high enough to cause wheelspin. Same with M5/6. The short lower gears must have other reasons than performance even for F1x M cars. See my point with parking maneuvers.
Also, in higher gears, you will be forced to slightly short shift due to drivetrain losses and their interaction with air drag, so the tighter gearing makes sense. I'm sure you won't be noticeable faster if you'd change gear spacing any other way. I didn't notice that the new DCT is even heavier. They really focused on the MT. Anyway, I still think DCT and FI engine fits better. Last edited by Kadema; 02-24-2014 at 01:36 AM.. |
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02-23-2014, 11:30 PM | #107 |
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I guess you mean to ask how you correlate road speed and RPM using gear ratios?
Like so: V = (RPM * (WD*25.4 + TW*AR*2/100)xPi*60) / (GR*FD*1000000) V = Road speed in km/h (divide by 1.609 to get mph) RPM = engine speed in RPM (duh) WD = Wheel diameter in inches TW = Tire width in mm AR = Aspect ration in % Pi = 3.1416 GR = Gear ratio FD = Final drive This remains an approximation because tire specified dimensions are not exact. But this calculation is still pretty close. Last edited by CanAutM3; 02-23-2014 at 11:35 PM.. |
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02-23-2014, 11:34 PM | #108 | |
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02-23-2014, 11:35 PM | #109 | |
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I thought he was saying that the units in the previous cars were automatic and didn't actually have clutches. Then I started thinking about the DCT and that's where I got all wrapped up. Trying to post here when I should be writing tickets is the problem. I'm not off until 0500. |
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