How often do you launch control?
Le Mans Master
Joined: Sep 2017
Posts: 5,767
Likes: 2,968
From: Rural NW Georgia. GO DAWGS!
2024 C8 of the Year Finalist - Unmodified
I did it at Spring Mountain. Someone correct me if I’m mistaken but they don’t teach you how to do anything at that school that’s not described in the owners manual.
Moderator
Joined: Dec 2002
Posts: 40,901
Likes: 4,352
From: Lakewood Ranch, FL
Can't happen in a C7, needs a DCT! Understand they are driving thru both 1st and 2nd gears and shafts by slipping both clutches. No such ability with a C7 auto or manual.
Quoting the person who had Josh Holder's current job when the C8 was launched. GM’s Chief Corvette Engineer, Piatek: “We found that during very aggressive launches we can drive torque through both shafts/clutches simultaneously which improves the 0 to 60 times.”
In a recent post it was indicated GM is doing what some other performance DCT's do. Put power thru both clutches simulations BY SLIPPING THE CLUTCHES. I posted that must be for only milliseconds. A member who works in the automotive control field said with some performance DCTs it's near 100 milliseconds in some DCTs. He had no direct info for the Tremec built DCT.
Quoting the person who had Josh Holder's current job when the C8 was launched. GM’s Chief Corvette Engineer, Piatek: “We found that during very aggressive launches we can drive torque through both shafts/clutches simultaneously which improves the 0 to 60 times.”
In a recent post it was indicated GM is doing what some other performance DCT's do. Put power thru both clutches simulations BY SLIPPING THE CLUTCHES. I posted that must be for only milliseconds. A member who works in the automotive control field said with some performance DCTs it's near 100 milliseconds in some DCTs. He had no direct info for the Tremec built DCT.
Drifting
Joined: Dec 2019
Posts: 1,310
Likes: 1,836
Use it a ton, really fun. I've bet I've done a 100 over the last couple years. It's made to do it. They don't just add Launch Control for you not to use it, or for it to damage anything. It's an intentional feature.
Burning Brakes
Joined: May 2023
Posts: 1,042
Likes: 374
From: Ontario
Once or twice (or thrice?) in almost 11,000 miles.
Used it entering the freeway from a rest area. Waited until traffic cleared, forward and aft, then hit it.
Felt like I needed a fighter pilot g-suit to keep me from passing out, first time.
Fun, but I think a WOT start is just as cool.
Used it entering the freeway from a rest area. Waited until traffic cleared, forward and aft, then hit it.
Felt like I needed a fighter pilot g-suit to keep me from passing out, first time.
Fun, but I think a WOT start is just as cool.
E-Ray, 3LZ, ZER, LIFT
Joined: Sep 2007
Posts: 35,067
Likes: 12,429
From: NE South Carolina
Yep it does something called "Launch Control" BUT totally different than driving power thru two gears simultaneously like the Tremec Dual Clutch Transmission by slipping both clutches for perhaps 100 milliseconds.
Quoting: "Launch control in a C7 Corvette helps drivers accelerate. quickly from a standing start. It does this by optimizing throttle progression, adjusting steering effort and Magnetic Ride damping, and enabling Performance Traction Management. Launch control also helps manage torque, throttle, and gear settings to reduce wheel spin and prevent vehicle damage."
PS: In my Street Rod with it's set back 8.2 Liter BB, Headers, 850 Holley Double Pumper, Electronic Ignition, CNC Ported Intake Manifold and Aluminum Heads I do some similar things with it's race prepared TH400. It has a high stall converter so I can launch at as high an rpm as the 16.5 section width (420 Metric) Mickey Thompsons in the Posi equipped, Currie prepared 9" Ford dif can handle. With 53% of it's 3000 lbs on the rear, it's an aggressive launch but not putting power thru 2 gears as Launch Control in my E-Ray. Nor is the Launch as aggressive.
Last edited by JerryU; Jul 29, 2024 at 08:06 PM.
Moderator
Joined: Dec 2002
Posts: 40,901
Likes: 4,352
From: Lakewood Ranch, FL
Yep folks with a "slushbox trans" in C6 and C7's had something called "Launch Control." My C6, two C7's like my '88 and '93 Vettes, in fact every DD I had from my 1st car a '41 Ford Coupe I stuffed in an Olds engine in 1959 (and before my 2020 C8 Z51) were standard shifts!
Yep it does something called "Launch Control" BUT totally different than driving power thru two gears simultaneously like the Tremec Dual Clutch Transmission by slipping both clutches for perhaps 100 milliseconds.
Quoting: "Launch control in a C7 Corvette helps drivers accelerate. quickly from a standing start. It does this by optimizing throttle progression, adjusting steering effort and Magnetic Ride damping, and enabling Performance Traction Management. Launch control also helps manage torque, throttle, and gear settings to reduce wheel spin and prevent vehicle damage."
PS: In my Street Rod with it's set back 8.2 Liter BB, Headers, 850 Holley Double Pumper, Electronic Ignition, CNC Ported Intake Manifold and Aluminum Heads I do some similar things with it's race prepared TH400. It has a high stall converter so I can launch at as high an rpm as the 16.5 section width (420 Metric) Mickey Thompsons in the Posi equipped, Currie prepared 9" Ford dif can handle. With 53% of it's 3000 lbs on the rear, it's an aggressive launch but not putting power thru 2 gears as Launch Control in my E-Ray. Nor is the Launch as aggressive.
Yep it does something called "Launch Control" BUT totally different than driving power thru two gears simultaneously like the Tremec Dual Clutch Transmission by slipping both clutches for perhaps 100 milliseconds.
Quoting: "Launch control in a C7 Corvette helps drivers accelerate. quickly from a standing start. It does this by optimizing throttle progression, adjusting steering effort and Magnetic Ride damping, and enabling Performance Traction Management. Launch control also helps manage torque, throttle, and gear settings to reduce wheel spin and prevent vehicle damage."
PS: In my Street Rod with it's set back 8.2 Liter BB, Headers, 850 Holley Double Pumper, Electronic Ignition, CNC Ported Intake Manifold and Aluminum Heads I do some similar things with it's race prepared TH400. It has a high stall converter so I can launch at as high an rpm as the 16.5 section width (420 Metric) Mickey Thompsons in the Posi equipped, Currie prepared 9" Ford dif can handle. With 53% of it's 3000 lbs on the rear, it's an aggressive launch but not putting power thru 2 gears as Launch Control in my E-Ray. Nor is the Launch as aggressive.
E-Ray, 3LZ, ZER, LIFT
Joined: Sep 2007
Posts: 35,067
Likes: 12,429
From: NE South Carolina
SIDEBAR
Every DD I have had since my 1st car a '41 Ford coupe I stuffed in an OLDS engine had been a standard shift. It as well as my friend and colleague's 1967 427 cid, 435 hp Vette coupe I drove needed "Lauch control" to get those skinny tires of the day to Launch. That was all done by your right and left foot, seat of paints "feel" and brain! I recall driving his 1967 Vette with its 205-section width skinny tires! Like my '41 Coupe that required slipping the clutch similar to the Beach Boys song "Shut Down!" Quoting some words:
Superstock dodge is windin' out in low
But my fuel injected Stingray's really startin' to go
To get the traction, I'm ridin' the clutch
My pressure plate's burnin', that machine's too much
Yep, clutch got hot as only way to avoid excessive wheel spin!
Sidenote, always chuckle at folks remembering that light '67 427/435 hp Vette with fondness. 0 to 60 is quoted at 5 seconds and I recall when power shifting to 2nd and 3rd lots of "excitement" as that flexible chassis and simple suspension caused the car to try to change lanes! Nope those good old days were a bit of a joke compared to the very stable (although exciting) Launch in my E-Ray when using Lauch Control that sends power to two gears by slipping both clutches for ~100 milliseconds!
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Drifting
Joined: Aug 2022
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From: Stamford, CT
Race Director
Joined: Aug 2016
Posts: 12,866
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From: Garden Valley CA
I did it once in my car just to make sure it worked. While it will give you a slightly faster exit I don't think your butt can tell the difference (I did it several times at Spring Mountain). I'm satisfied just stomping on the gas but I don't think using launch control adds any more stress to the system than just stomping on the gas.
