The C8 launch control zero to sixty timed
Thread Starter
Race Director
Joined: Oct 2008
Posts: 16,607
Likes: 7,691
From: NJ
The C8 launch control zero to sixty timed
i tried my best.. a little lazy at the start and a little quick on the stop and then vice versa lol.. need another set of hands!!
if 56mph is the top of 2nd, then the 2/3 completed shift should be 60 with momentum.. to pull a real sub 3 second in the street will be tough on those tires as i gave it much more than even a 3ft rollout on the low 3 and the 2.95.. but this was only one launch. was just surprised by the amount of wheelspin. was similar to that video of the blue one on the street taking off without the launch control.
if 56mph is the top of 2nd, then the 2/3 completed shift should be 60 with momentum.. to pull a real sub 3 second in the street will be tough on those tires as i gave it much more than even a 3ft rollout on the low 3 and the 2.95.. but this was only one launch. was just surprised by the amount of wheelspin. was similar to that video of the blue one on the street taking off without the launch control.
Last edited by 24/Eray; Sep 4, 2019 at 09:17 PM.
Safety Car
Joined: Dec 2009
Posts: 4,976
Likes: 720
From: Alberta
2022 C2 of the Year Finalist - Modified
C2 of the Year Finalist - Modified 2020
Make sure you factor in the speed of sound since you are basing the speed of the C8 on the sound of the shifts the DCT is making.
The mic reference in timing needs to be adjusted for the amount of time required for the sound to travel from the C8 to the mic at the time of the 2nd shift.
The mic reference in timing needs to be adjusted for the amount of time required for the sound to travel from the C8 to the mic at the time of the 2nd shift.
Tech Contributor
Joined: Oct 1999
Posts: 41,013
Likes: 9,775
From: Charlotte, NC (formerly Endicott, NY)
Also other than having a certain speed when the shift occurs momentum doesn't provide any additional acceleration. For the short period of time that engine torque isn't transferred to the rear wheels during the shift the car is coasting and actually dropping in speed.
Bill
Bill
Instructor
Joined: Jul 2018
Posts: 142
Likes: 27
From: ND
Also other than having a certain speed when the shift occurs momentum doesn't provide any additional acceleration. For the short period of time that engine torque isn't transferred to the rear wheels during the shift the car is coasting and actually dropping in speed.
Bill
Bill
Safety Car
Joined: Dec 2009
Posts: 4,976
Likes: 720
From: Alberta
2022 C2 of the Year Finalist - Modified
C2 of the Year Finalist - Modified 2020
Melting Slicks
Joined: Aug 2017
Posts: 2,518
Likes: 942
From: Fl
If this Chevrolet video is to be believed this may not be entirely true. Unless I'm missing something, it sounds like they are driving power through both clutches at the same time during shifts, at least on "aggressive launches". So second gear isn't stopping power delivery until third gear has already started delivering power which basically makes the shift time moot since there is a seamless delivery of torque during acceleration despite the gear change. Not sure if this also happens on the 1-2 or 3-4, 4-5 etc shifts, but 2-3 is mentioned. Again, this is a Chevy video so take that for what it's worth.
https://www.youtube.com/watch?v=k0FjkvFQcso
https://www.youtube.com/watch?v=k0FjkvFQcso
Awesome stuff! (And I’m a manual transmission fan)
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
5 MOST and 5 LEAST Popular Corvette Model Years in History!
Joe Kucinski
Burning Brakes
Joined: Apr 2018
Posts: 1,051
Likes: 690
If this Chevrolet video is to be believed this may not be entirely true. Unless I'm missing something, it sounds like they are driving power through both clutches at the same time during shifts, at least on "aggressive launches". So second gear isn't stopping power delivery until third gear has already started delivering power which basically makes the shift time moot since there is a seamless delivery of torque during acceleration despite the gear change. Not sure if this also happens on the 1-2 or 3-4, 4-5 etc shifts, but 2-3 is mentioned. Again, this is a Chevy video so take that for what it's worth.
https://www.youtube.com/watch?v=k0FjkvFQcso
https://www.youtube.com/watch?v=k0FjkvFQcso
That clutch pack better be the most robust clutch pack, or a wet clutch setup (dry clutch is superior*), or both to last the duration of the warranty.
Le Mans Master
Joined: Mar 2002
Posts: 5,955
Likes: 161
From: PNW
Pro
Joined: Aug 2019
Posts: 695
Likes: 523
i tried my best.. a little lazy at the start and a little quick on the stop and then vice versa lol.. need another set of hands!!
https://youtu.be/l27X0NSMk_s
if 56mph is the top of 2nd, then the 2/3 completed shift should be 60 with momentum.. to pull a real sub 3 second in the street will be tough on those tires as i gave it much more than even a 3ft rollout on the low 3 and the 2.95.. but this was only one launch. was just surprised by the amount of wheelspin. was similar to that video of the blue one on the street taking off without the launch control.
https://youtu.be/l27X0NSMk_s
if 56mph is the top of 2nd, then the 2/3 completed shift should be 60 with momentum.. to pull a real sub 3 second in the street will be tough on those tires as i gave it much more than even a 3ft rollout on the low 3 and the 2.95.. but this was only one launch. was just surprised by the amount of wheelspin. was similar to that video of the blue one on the street taking off without the launch control.
Drifting
Joined: Jul 2019
Posts: 1,325
Likes: 701
i tried my best.. a little lazy at the start and a little quick on the stop and then vice versa lol.. need another set of hands!!
https://youtu.be/l27X0NSMk_s
if 56mph is the top of 2nd, then the 2/3 completed shift should be 60 with momentum.. to pull a real sub 3 second in the street will be tough on those tires as i gave it much more than even a 3ft rollout on the low 3 and the 2.95.. but this was only one launch. was just surprised by the amount of wheelspin. was similar to that video of the blue one on the street taking off without the launch control.
https://youtu.be/l27X0NSMk_s
if 56mph is the top of 2nd, then the 2/3 completed shift should be 60 with momentum.. to pull a real sub 3 second in the street will be tough on those tires as i gave it much more than even a 3ft rollout on the low 3 and the 2.95.. but this was only one launch. was just surprised by the amount of wheelspin. was similar to that video of the blue one on the street taking off without the launch control.
Le Mans Master
Joined: Oct 2005
Posts: 5,038
Likes: 878
From: Tampa Florida
What about the other cars that you had mentioned did MT did start those on a roll or any other magazine? I do get your point......it should be a fair time
Last edited by Fore58; Sep 30, 2019 at 01:12 PM.
Race Director
Joined: Sep 2016
Posts: 13,180
Likes: 10,521
Race Director
Joined: Dec 2006
Posts: 12,317
Likes: 2,868
From: Fort Worth, Texas
Intermediate
Joined: Jan 2009
Posts: 29
Likes: 7
Resetting post to //Sarcasm <Off> 
Make sure you factor in the speed of sound since you are basing the speed of the C8 on the sound of the shifts the DCT is making.
The mic reference in timing needs to be adjusted for the amount of time required for the sound to travel from the C8 to the mic at the time of the 2nd shift.
The mic reference in timing needs to be adjusted for the amount of time required for the sound to travel from the C8 to the mic at the time of the 2nd shift.
Race Director
Joined: Dec 2006
Posts: 12,317
Likes: 2,868
From: Fort Worth, Texas
It’s slower than my old run in C5 that made a little over 400rwhp in video below which I figure should be similar to what a C8 runs in optimal conditions, so if the disclaimers are true then it makes sense...