0-60 Times
Thread Starter
Drifting
Joined: Oct 2005
Posts: 1,331
Likes: 479
From: Appleton Wisconsin
0-60 Times
I have a 2023 non Z51 with 3000 miles and the best I can get in Track launch control is 3.1sec
In the attached video this guy has a 2020 non Z51 and he is getting 2.7 consistently and even had a 2.6.
I know GM changed the fuel management in 22 to meet some new emission law
and I’m wondering if that didn’t take some HP away from the engine.
In the attached video this guy has a 2020 non Z51 and he is getting 2.7 consistently and even had a 2.6.
I know GM changed the fuel management in 22 to meet some new emission law
and I’m wondering if that didn’t take some HP away from the engine.
Pro
Joined: Aug 2012
Posts: 657
Likes: 192
From: Memphis Tennessee
Someone posted a comparison with dragy to finally prove that the on board 0-60 timer is indeed highly inaccurate (timer is faster than actual). He ran 4 tests with a dragy and all 4 times the dragy showed a slower time than the on board timer did, one of which was as much as a .40 difference. Basically, if your on board 0-60 shows 2.6, you're likely really hitting a 3.0+
Le Mans Master
Joined: Jul 2000
Posts: 6,559
Likes: 4,501
From: North Dallas 40 TX
I have a 2023 non Z51 with 3000 miles and the best I can get in Track launch control is 3.1sec
In the attached video this guy has a 2020 non Z51 and he is getting 2.7 consistently and even had a 2.6.
I know GM changed the fuel management in 22 to meet some new emission law
and I’m wondering if that didn’t take some HP away from the engine.
https://youtu.be/JbA1GZWkQjY
In the attached video this guy has a 2020 non Z51 and he is getting 2.7 consistently and even had a 2.6.
I know GM changed the fuel management in 22 to meet some new emission law
and I’m wondering if that didn’t take some HP away from the engine.
https://youtu.be/JbA1GZWkQjY
Moderator
Joined: Dec 2002
Posts: 40,899
Likes: 4,352
From: Lakewood Ranch, FL
Someone posted a comparison with dragy to finally prove that the on board 0-60 timer is indeed highly inaccurate (timer is faster than actual). He ran 4 tests with a dragy and all 4 times the dragy showed a slower time than the on board timer did, one of which was as much as a .40 difference. Basically, if your on board 0-60 shows 2.6, you're likely really hitting a 3.0+
E-Ray, 3LZ, ZER, LIFT
Joined: Sep 2007
Posts: 35,044
Likes: 12,410
From: NE South Carolina
The quoted times are at a standard temperature a pressure, and humidity. If your temperature is higher than that, altitude is higher than that, and humidity higher than that, you will not get the stated 0-60 times. Oh and no wind, and the whole acceleration length must be level. Deviations from the standard can and likely will produce different results.
My 2020 C8 Owner's Manual states 91 octane reduces power. I know some will quote the newer manuals deleted that statement BUT it doesn't say it does not reduce power. Quite possible GM just eliminated the words reduced power with 91 octane to make CA folks and other areas where 91 is highest available "Feel Better!" Latest manuals do say IF TRACKING us 91 octane!
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Racer
Joined: Mar 2016
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2020 C8 of the Year Finalist - Unmodified
Someone posted a comparison with dragy to finally prove that the on board 0-60 timer is indeed highly inaccurate (timer is faster than actual). He ran 4 tests with a dragy and all 4 times the dragy showed a slower time than the on board timer did, one of which was as much as a .40 difference. Basically, if your on board 0-60 shows 2.6, you're likely really hitting a 3.0+
Basically, if someone is getting a 1/2 second or second + difference between Dragy and the onboard then they don't know how to set up their Dragy.
Like anything you gotta know what you're doing. But it doesn't matter - this whole "The Corvette dash is lieing!" has passed into Urban Myth status at this point.
Mine shows a ~.2s difference. I was getting 2.6s and 2.7 displayed and my Dragy was giving 2.83s and 2.87s on those same runs.
Pro
Joined: Aug 2012
Posts: 657
Likes: 192
From: Memphis Tennessee
And we've seen others post results where the onboard was much closer to Dragy times - like within a tenth.
Basically, if someone is getting a 1/2 second or second + difference between Dragy and the onboard then they don't know how to set up their Dragy.
Like anything you gotta know what you're doing. But it doesn't matter - this whole "The Corvette dash is lieing!" has passed into Urban Myth status at this point.
Mine shows a ~.2s difference. I was getting 2.6s and 2.7 displayed and my Dragy was giving 2.83s and 2.87s on those same runs.
Basically, if someone is getting a 1/2 second or second + difference between Dragy and the onboard then they don't know how to set up their Dragy.
Like anything you gotta know what you're doing. But it doesn't matter - this whole "The Corvette dash is lieing!" has passed into Urban Myth status at this point.
Mine shows a ~.2s difference. I was getting 2.6s and 2.7 displayed and my Dragy was giving 2.83s and 2.87s on those same runs.
Thread Starter
Drifting
Joined: Oct 2005
Posts: 1,331
Likes: 479
From: Appleton Wisconsin
The quoted times are at a standard temperature a pressure, and humidity. If your temperature is higher than that, altitude is higher than that, and humidity higher than that, you will not get the stated 0-60 times. Oh and no wind, and the whole acceleration length must be level. Deviations from the standard can and likely will produce different results.
I noticed about 15’ of black tire tracks on the blacktop, so maybe I’m having a higher et because of traction.
I might drop rear psi down to 23 and see if I gain anything.
I know the non Z51 won’t be as fast because of gear ratio, but I was surprised what that guy is getting with his non Z51
Safety Car
Joined: Nov 2007
Posts: 4,436
Likes: 875
From: Bay Area CA
Never said you are in V4 mode at rest.
GM recalibrated the Active Fuel management and updated fuel system. This was to improve emissions and gas mileage. I do ot know the specific changes, just speculating on the possibility of staying in V4 longer when activated during light throtle cruise.
GM recalibrated the Active Fuel management and updated fuel system. This was to improve emissions and gas mileage. I do ot know the specific changes, just speculating on the possibility of staying in V4 longer when activated during light throtle cruise.
Last edited by Mike's LS3; Sep 8, 2022 at 05:23 PM.
Pro
Joined: Jun 2014
Posts: 722
Likes: 274
From: Colorado Springs, CO
If you are concerned about your 0-60 times, don’t move to Colorado Springs where I live. I only checked it once at a blistering 4.1 seconds. At an altitude of 6,500 feet and 85 degrees I loose over 100 horsepower. I never tested it when I was bringing it home from Michigan, but when I hit 500 miles somewhere in Illinois I got on it once and it was much faster than it is here. At over 12,000 feet it is much slower than my BMW M340xi. The turbo charger in the BMW keeps its 382 horsepower pretty high up.
When I lived in Florida my C7 Z51 felt so much more powerful at sea level than my C8. I hope someone comes up with a reasonably priced supercharger for us high altitude drivers.
Don’t get me wrong, I love the car.
When I lived in Florida my C7 Z51 felt so much more powerful at sea level than my C8. I hope someone comes up with a reasonably priced supercharger for us high altitude drivers.
Don’t get me wrong, I love the car.
E-Ray, 3LZ, ZER, LIFT
Joined: Sep 2007
Posts: 35,044
Likes: 12,410
From: NE South Carolina
Temp was 80, dew point 60 and 800 ft above sea level. I use 93 octane and had the tires at 28 psi.
I noticed about 15’ of black tire tracks on the blacktop, so maybe I’m having a higher et because of traction.
I might drop rear psi down to 23 and see if I gain anything.
I know the non Z51 won’t be as fast because of gear ratio, but I was surprised what that guy is getting with his non Z51
I noticed about 15’ of black tire tracks on the blacktop, so maybe I’m having a higher et because of traction.
I might drop rear psi down to 23 and see if I gain anything.
I know the non Z51 won’t be as fast because of gear ratio, but I was surprised what that guy is getting with his non Z51
PS: 23 psi sounds way to low. Might try 2 lbs lower on the slipping tire. I have my street rod rear coilovers adjusted to offset rear axle torque. Unlikely yours are off significantly but possible.
Have that issue with my street rod with an 8.2 Liter BB, 53% of the weight on the rear 16.5-inch section width Micky Thonpson tires. If one slips at launch because of the pavement, you have a 1/2 second to lift or it instantly makes a 90-degree turn in the direction of the slipping tires. Launch right and there are two even short black marks.
Last edited by JerryU; Sep 8, 2022 at 06:40 PM.
Safety Car
Joined: Jul 2019
Posts: 4,079
Likes: 2,415
From: Florida
And we've seen others post results where the onboard was much closer to Dragy times - like within a tenth.
Basically, if someone is getting a 1/2 second or second + difference between Dragy and the onboard then they don't know how to set up their Dragy.
Like anything you gotta know what you're doing. But it doesn't matter - this whole "The Corvette dash is lieing!" has passed into Urban Myth status at this point.
Mine shows a ~.2s difference. I was getting 2.6s and 2.7 displayed and my Dragy was giving 2.83s and 2.87s on those same runs.
Basically, if someone is getting a 1/2 second or second + difference between Dragy and the onboard then they don't know how to set up their Dragy.
Like anything you gotta know what you're doing. But it doesn't matter - this whole "The Corvette dash is lieing!" has passed into Urban Myth status at this point.
Mine shows a ~.2s difference. I was getting 2.6s and 2.7 displayed and my Dragy was giving 2.83s and 2.87s on those same runs.
The dragy has been tested by dozens of people against timing lights and vbox. I probably have over a thousand runs on it on multiple platforms and have vbox myself and regularly take it to track rentals. Ive seen it accurate to.05 and .5mph
Moderator
Joined: Dec 2002
Posts: 40,899
Likes: 4,352
From: Lakewood Ranch, FL
Safety Car
Joined: Jul 2019
Posts: 4,079
Likes: 2,415
From: Florida
Theyre not commercial grade gps. Accuracy is claimed to 2cm.
Last edited by bhvrdr; Sep 8, 2022 at 09:36 PM.
