Okay before this spirals into the depths of forum hell let's ALL let it go! He made some excellent runs and it was bone stock, end of story!
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You can be anyone you want on the internet...and you can see the lack of humility and honesty by the posts one writes. I won't mention names or I will get moderated.
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I thought the C7 was a 10sec. from the factory?:(
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Originally Posted by Big Dan 427
(Post 1585245155)
Okay before this spirals into the depths of forum hell let's ALL let it go! He made some excellent runs and it was bone stock, end of story!
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Originally Posted by gthal
(Post 1585245126)
But that's missing the point of a DCT. For pure acceleration, you are correct not really needed. Responsiveness, feel and control on a track/road course... different story.
Regardless, the A6 seems to be a fast shifting auto for sure :thumbs: I'm keeping an open mind on the subject. |
Originally Posted by Divexxtreme
(Post 1585242024)
I agree that a DCT car won't be much faster than an auto's E.T. will b3 (although it will trap higher), but which dual-clutch cars shift that slowly? The slowest ones still shift in less than a 1/4 of a second, some as low as 8 milliseconds. Shift time - Wikipedia, the free encyclopedia
Not mention the fact that a DCT has no torque convertor, so has less parasitic losses than a manual, provide the driver with more much control over gear selection, as well as the ability to rev-match. Autos are cheaper to build, but DCTs are superior in every other day. |
Snorman, after watching the video (which is great). I believe you could improve your times if the car hadn't gone into V4 mode at about 1000'....just saying :D
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I can't wait to see some more video once your car is "broken in", Snorman
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Originally Posted by DCTandAWD?
(Post 1585246377)
Why do so many people fail to educated themselves, deny facts, and hate progress so much?
A world class DCT costs $11k. They are reliable. They are faster than every transmission due to seamless power deliver and launch control. A DCT would have cut 7 tenths off this time and would allow more control and lighting fast downshifts and upshifts for road racing. The ENTIRE AUTO WORLD accepts these known facts above while a few uneducated members of CF deny reality while crying the world is flat and that we should stay with drum brakes and carbs. Shaking my head. Those same people were around in 1965 when the Corvette debuted with four wheel disc brakes(of course the Crosley Hot Shot sports car had four wheel disc brakes as standard equipment back in 1949, as did their sedan, station wagon, convertible and pickup). Chevrolet realized that some can't accept new ideas so they offered a "disc brake delete" option and fitted those Corvettes with drum brakes. AND, there were 316 buyers that took advantage of it. |
Originally Posted by DCTandAWD?
(Post 1585246377)
Why do so many people fail to educated themselves, deny facts, and hate progress so much?
A world class DCT costs $11k. They are reliable. :nopity:beatdeadhorse: :chevy |
I dunno, a friends GTI has a DCT and it's pretty dang nice. Perhaps the rest of the car only cost 15k and then 11k for the trans?? Doubtful..
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Reading through this I'm not sure why many seem to want to discount the times because of the track. We all know that Atco, Etown and Cecil County are fast tracks, BUT this was not one of those days where Atco saw the mineshaft -2000 DAs that is is so well known for. The opening post lists the DA as 400 ft. Decent weather, but far from ideal for best ETs. Wait until Snorman, or someone else, runs a C7 on a -2000 (or less :eek:) DA day...............then we'll really have some people pissing and moaning. :lol:
BTW, great runs Snorman..................these cars have a lot left in them. :thumbs: |
Originally Posted by DCTandAWD?
(Post 1585246377)
A DCT would have cut 7 tenths off this time and would allow more control and lighting fast downshifts and upshifts for road racing.
Mclaren MP4-12C - trap 130+mph 591/612 hp 3155 lb 458 - trap 130+mph 562hp 3267 lb Both cars have over +100 more hp than the C7, are lighter, and trap 130mph. I could see the DCT gaining a few mph but you are not getting 7 tenth out of the quicker shifts. |
Originally Posted by racerns
(Post 1585248143)
So you are saying it would have run a 10.9X @12X mph if it had been a DCT? I can see some improvement but no way 7 tenths, less than half of that at most. Let look at some of the rwd cars that have DCT that have reportedly run high 10s:
Mclaren MP4-12C - trap 130+mph 591/612 hp 3155 lb 458 - trap 130+mph 562hp 3267 lb Both cars have over +100 more hp than the C7, are lighter, and trap 130mph. I could see the DCT gaining a few mph but you are not getting 7 tenth out of the quicker shifts. |
Originally Posted by DCTandAWD? View Post Why do so many people fail to educated themselves, deny facts, and hate progress so much? A world class DCT costs $11k. They are reliable. They are faster than every transmission due to seamless power deliver and launch control. A DCT would have cut 7 tenths off this time and would allow more control and lighting fast downshifts and upshifts for road racing. The ENTIRE AUTO WORLD accepts these known facts above while a few uneducated members of CF deny reality while crying the world is flat and that we should stay with drum brakes and carbs. Shaking my head. |
Originally Posted by Mike Campbell
(Post 1585248529)
I'm shaking my head too ! Seven tenths of a second?!? You do realize that the C7 goes thru the quarter before it hit's 4th gear? So the 11K tranny in order to improve that run of 11.6 would have had to shift 0.035 secs. faster than the existing trans. because it only needs to shift twice in the quarter. Correct me if I 'm wrong but isn't this faster than the best DCT out there? :crazy2: I accept that DCT's are the wave of the future but so are CVT's. I think your numbers are overly optomistic and just because the " rest of the world " goes that way doesn't always mean it's best. The DCT's work best on high reving lower torque engines mainly to reduce RPM & HP loss during shifting. I agree that very soon Corvettes will have these type transmissions but 7 tenths of a second? Puhl - lezzz.
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Originally Posted by JoesC5
(Post 1585248840)
You mean like a normally aspirated 6.3L V8 with 631HP at 7,400 RPM with an 8,000 RPM redline with 468.35 lbs-ft of torque with a 7 speed DCT.
Clearly is has a base price of $51,995 just like the C7? Right? |
DCT's funtion very well, but are heavier and more complicated that some other options. They still have the limitations of an automated clutch at low speeds (need good programming to properly slip the clutch without bucking or being harsh).
A slushbox auto also has the ability to prestage shifts and if designed to, could shift very quickly (comparable to a DCT). It's just that most autos haven't been designed to do that. I think GM could easily get by with a torque converter based auto as long as they design it for fast shifting and optimize the shift logic to prevent it from going straight to top gear and then sitting there. Jaguar's new 8-speed auto seems to compare favorably to Porsche's PDK, which is one of the best DCT's available (based on F-type reviews). And those 1/4 mile times put up by the OP are very nice. -T |
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