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I don't like to sit there with the clutch burning so I stomp the gas and immediately lift off the brake.
Yes, Launch Mode will produce a lower 0-60, but it feels like I am really straining the car, so I decided not to use it anymore.
When I take someone for their first ride, all I have to do is come to a stop and then floor it. It goes, everyone is impressed, and IMO a lot less wear on the drivetrain.
If you are looking for the ultimate 0-60 time, or consistent drag strip times, Launch Mode is required.
I don't like to sit there with the clutch burning so I stomp the gas and immediately lift off the brake.
Yes, Launch Mode will produce a lower 0-60, but it feels like I am really straining the car, so I decided not to use it anymore.
When I take someone for their first ride, all I have to do is come to a stop and then floor it. It goes, everyone is impressed, and IMO a lot less wear on the drivetrain.
If you are looking for the ultimate 0-60 time, or consistent drag strip times, Launch Mode is required.
I don't use it often but like yesterday, great weather, no traffic so decided to see if i could beat that achieved in May: 2.1 seconds 0 to 60. Only matched!
Best I did before I had the ~1500 miles and was willing to to use Launch Mode was 2.4 Seconds without. Still aggressive. In day to day driving no need! In fact most aggressive acceleration is NOT from a standing start.
My first thought was how did you get a 2.1? What mods did you do? Then I saw the eAWD. Now I want one. Wow, smokin.
Yep, not just me others have achieved 2.1 as well, using Lauch Control. The following Pics show how it achieves that on street payment with street tires!
This 1st Pic is from a Hagerty 1/4-mile test video where it beat a RWD C8 C06, 700 hp Ferrari and Lambo. Those FWD cars can't get their higher hp engine power to the ground at launch. The E-Ray with its 345 rear tires can get use all 495 hp and most important 160 electric motor front hp with max torque at 0 rpm to jump ~2 car lengths at Launch (Pic from their video taken ~1 second after launch.)
This Dyno shows benefits of max torque at zero rpm. GM quotes E-Ray 2.5 seconds 0 to 60 using their Dash Test. Hagerty got 2.4 seconds. After many tests before I got enough miles to use Launch Control consistently achieved 2.5 seconds with best at 2.4. BUT I found I needed ~100% battery charge versus the ~80% you get in all but Track Mode. Even though I have the ZER Option C8 Z06 tires I also had to get the tire surface hot. Did that by driving aggressively in Z-Mode Power set to Track. Then when I entered my 3/4 mile long "Test Street" (mostly farm fields both sides) accelerated at WOT from ~10 mph to 95+, then applied the brakes aggressively (~0.8 "g" to a stop and performed the Dash Test immediately. Did the same with Lauch Control to get 2.1 seconds.
You'll see in video link a fellow did his test after driving several laps on a road course that heated his tires for max traction.
BTW, being a gearhead since ~13 when I retired in 2000 built a ProStreet Rod with a setback 8.2 Liter BB. It has 53% of its 3000 lbs on the rear 16.5-inch section with Mickey Thomsons. Made >100 acceleration tests measuring with my G-Teach Pro to set the 4-bar link rear and to get the 850 CFM Holley to avoid bog when the rear fuel bowl was going lean at a > 1 "g" Launch. Took oxygen sensor installed in Sanderson long tube header collector, to define the issue. Thn Power Plug, jet extensions in rear bowl. Also to 50 CC viruses standard 30 CC accelerator pumps with one of their 6 cams that gave a quick fuel shot BUT did not empty the pumps! Although exciting can't come close to 2.1 seconds! BTW GM no doubt subtracts dragstrip rollout from the number Dast Test # like all cag mags who publish 0 to 60 times.
That 2.0 in your ER is fantastic. I can't imagine how that must feel. Very happy to get 2.7 using the one touch Z button launch control in my '24 Z51 HTC-- without race mode and tires being overinflated.
That 2.0 in your ER is fantastic. I can't imagine how that must feel. Very happy to get 2.7 using the one touch Z button launch control in my '24 Z51 HTC-- without race mode and tires being overinflated.
Eray is about 300lbs heavier than the SR and Z06 (coupes) so to me, it’s not the violent. However, you know the car is moving especially at the track. Next time out to the drags, I will see what the car does 0-60 there. It’s probably sub 2s.
Eray is about 300lbs heavier than the SR and Z06 (coupes) so to me, it’s not the violent. However, you know the car is moving especially at the track. Next time out to the drags, I will see what the car does 0-60 there. It’s probably sub 2s.
Great Job! Yep expect with prepped surface should beat it. In the early Hagerty video Jason Cammisa, the MC stated the front tires were in the verge of losing traction at launch. So not only rear but front tires can benefit. IMO GM folks were there as it was before the E-Ray was available so only way they got it to test. It's no home video! Jason is a Pro and the video is tight and crisp. His words IMO were no doubt, written in a story board GM reviewed. That is why I expect that comment was supported with data.
Good luck.
I conduct my burn outs in competitive mode track 2, with paddle shifters. Then there is nothing left to do in preparation for my launch. 60fts are usually 1.55-1.57s.
If I weren't retired and on a fixed income, this one thread alone would have me buying an E-Ray and trading in my 2021 Z51, especially since current E-Rays are marked down about $8,000 from MSRP.
So I have done a double paddle dump in first. But can you do it in any gear? say your rolling 15-25 and want to dump second gear? or maybe 3rd? will it work?
The OP asked how fast you could do if you were NOT in launch mode. I was in tour mode and did a 3.1 seconds 0-60 in my '24 HTC Z51. The engine only revved to 1750 rpm. Still, that was better than using Launch mode at Spring Mountain, where the coupe Z51 did 3.2 seconds. But at Spring Mountain you're in elevation over 3,000 feet with negative camber on the tires. So that accounts for the slower time. In launch mode I got a 2.7, so almost half a second difference, and I could probably get 2.6 if my tires were properly inflated and using PTM Track.
So I have done a double paddle dump in first. But can you do it in any gear? say your rolling 15-25 and want to dump second gear? or maybe 3rd? will it work?
Whether it works or not depends on what you are trying to accomplish. I think you could just try it.
The "Rapid Exit" descriptions says the speed must be less than 6 mph.
The "Standard Exit" says this: "Engine power is reapplied to
the wheels gently to support normal vehicle
operation on public roads. This occurs when
paddles are released under any of the these
conditions:
. Accelerator pedal is fully released
. Vehicle speed is above 10 km/h (6 mph)
. Vehicle is in R (Reverse)
. Paddles are released separately
If the vehicle was in Temporary Manual Paddle Shift mode before entering Double Paddle Declutch, the vehicle will return to D (Drive) with automatic shifting upon exiting Double Paddle Declutch."
What I get out of it is this: 1. You can do a double paddle declutch at any speed and it will disengage the clutches. 2. If your speed is above 6 mph and you release the paddles, its considered a "Standard Exit" and it says power is "reapplied gently" to the wheels. I think you could still try flooring the accelerator pedal before releasing the paddles - I'm just not sure if the RPM will limt the same way, or go up to red line before the paddles are released. 3. When exiting this way, it is going to default to automatic shift mode and select the gear it wants.
So, you can do it, and it will "work", but it says power will be reapplied gently.
On 1/25/25 I made 3 passes at the drag strip. Using launch control my 60 foot times were 1.63 and 1.70, and to experiment on the last pass I launched off idle and my 60 foot time was 1.70, which was close to the 1.63 and mirrored the other 1.70. All were done in track mode, race 2, and the same kind of burnout (which means very little heat on the tires) was used in every race. Fresh track prep on all runs and the DA didn't change much at all while I was there.
Mods= E85 tune and Mickey ET street R 325/35/18.
Last edited by OLD_GOAT; Jan 28, 2025 at 09:31 PM.
Whether it works or not depends on what you are trying to accomplish. I think you could just try it.
The "Rapid Exit" descriptions says the speed must be less than 6 mph.
The "Standard Exit" says this: "Engine power is reapplied to
the wheels gently to support normal vehicle
operation on public roads. This occurs when
paddles are released under any of the these
conditions:
. Accelerator pedal is fully released
. Vehicle speed is above 10 km/h (6 mph)
. Vehicle is in R (Reverse)
. Paddles are released separately
If the vehicle was in Temporary Manual Paddle Shift mode before entering Double Paddle Declutch, the vehicle will return to D (Drive) with automatic shifting upon exiting Double Paddle Declutch."
What I get out of it is this: 1. You can do a double paddle declutch at any speed and it will disengage the clutches. 2. If your speed is above 6 mph and you release the paddles, its considered a "Standard Exit" and it says power is "reapplied gently" to the wheels. I think you could still try flooring the accelerator pedal before releasing the paddles - I'm just not sure if the RPM will limt the same way, or go up to red line before the paddles are released. 3. When exiting this way, it is going to default to automatic shift mode and select the gear it wants.
So, you can do it, and it will "work", but it says power will be reapplied gently.
Will have to test once I amke the swap from my C7Z. but a good ole 2nd gear dump when rolling is the key to a good rolling away burn out haha. sounds like its going to be a let down in that area.
Will have to test once I amke the swap from my C7Z. but a good ole 2nd gear dump when rolling is the key to a good rolling away burn out haha. sounds like its going to be a let down in that area.
I can get a chirp from the tires on my 1960 vette with base 283 engine shifting into second and third. Its with the factory 4 speed transmission. That transmission can be shifted incredibly fast - much faster than the 6 speed I had in my C5.
I can get a chirp from the tires on my 1960 vette with base 283 engine shifting into second and third. Its with the factory 4 speed transmission. That transmission can be shifted incredibly fast - much faster than the 6 speed I had in my C5.
Yea I have a 66 Coupe with Muncie 4 speed/ Hurst its fun to play with for sure. and Chirping tires not problem.
same with any of the C5/C6/C7s I have had. This is going to be a differnent car. I have put off making the swap as I like a 3 pedal car. but I got a 2024 Truck, and all the new tech has made me want to pull the trigger and dive into a C8
I can get a chirp from the tires on my 1960 vette with base 283 engine shifting into second and third. Its with the factory 4 speed transmission. That transmission can be shifted incredibly fast - much faster than the 6 speed I had in my C5.
Yep the large gears in my two C7 Tremec 7 speed transmissions, needed to handle the torque in 1st and 2nd, with the triple synchro cones made that shift somewhat slow. I added an MGW Shifter to my 2017 Grand Sport and that shorter throw was faster and more positive. The full 2 1/4" diameter cue ball size **** I added to their shifter helped the grip as well.
It replaced the complete mechanism with very ridged parts.
The bushings the shift rod road in were much better and low friction.
Yep the large gears in my two C7 Tremec 7 speed transmissions, needed to handle the torque in 1st and 2nd, with the triple synchro cones made that shift somewhat slow. I added an MGW Shifter to my 2017 Grand Sport and that shorter throw was faster and more positive. The full 2 1/4" diameter cue ball size **** I added to their shifter helped the grip as well.
It replaced the complete mechanism with very ridged parts.
The bushings the shift rod road in were much better and low friction.
My C5 was all stock. The six speed factory trans seemed sluggish to shift, and the hydraulic clutch also seemed a bit sluggish. And the clutch engagement seem "soft" - all based on feel.
The 1960, with redline MT90 manual transmission fluid, will shift as fast as I can move the lever and clutch pedal. Other fluids did not work as well. The car is not fast, just the shifting.
The C5 was much, much faster but the shifting seemed sluggish. I tried both GM fluid for that unit, and also a Redline product - not sure which one any more. As I recall, it did not make a lot of difference - and I eventually went back to the OEM fluid for the C5.
