Chevrolet: Stock 2012 ZL1 Runs 11.93 Quarter Mile (Video) - Page 41 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

8cd03gro · 05-09-2012, 04:42 PM

Quote:

Originally Posted by JusticePete

The statement is as ludicrous now as it was then. There is no such thing as a street tire that can compare to SLICKS.

Drag radials ain't slicks.

I didn't say anything about drag radials and I agree the statement is ludicrous, that wasn't my point. It's just curious to me how some of the people that have the least confidence in the G2 tire are the ones getting mad when other people are surprised they ran a 1.6X 60'. Meanwhile a car in negative DA on slicks and skinnies is also running a 1.6 60'. Obviously the G2 can supply a LOT of grip if there's almost no benefit from drag radials stock.

Quote:

Originally Posted by JusticePete

At stock power I would have to say that it takes a really good driver to benefit from the DRs in the ZL1. GM has got the Launch Mode so dialed in for the ZL1 as it delivers from the factory it is impressive. Bump the RWHP by 100 and DRs are the weapon of choice.

I thought it was stated the launch control wasn't used on these runs? I could be wrong though.

HDRDTD · 05-09-2012, 04:45 PM

Quote:

Originally Posted by 8cd03gro

I thought it was stated the launch control wasn't used on these runs? I could be wrong though.

As far as I can tell , PTM WAS used in the GM video, but in the Ignition video they did it both ways demonstrating that using the PTM would result in a more consistant launch, but if you knew what you were doing, you could get better 0-60 and 1/4 times with the modes turned off.

Rice Killer · 05-09-2012, 04:54 PM

PTM was not used. Inside Line contacted GM regarding the argument of slicks or no slicks. GM responded no slicks and manual was without PTM. Link below.

http://blogs.insideline.com/straight...cond-club.html

8cd03gro · 05-09-2012, 04:56 PM

That's what I thought. As far as needing a really good driver to benefit from drag radials stock, well I'd consider anyone running a 1.6X 60' on stock street tires a really good driver.

HDRDTD · 05-09-2012, 04:56 PM

Quote:

Originally Posted by Rice Killer

PTM was not used. Inside Line contacted GM regarding the argument of slicks or no slicks. GM responded no slicks and manual was without PTM. Link below.

http://blogs.insideline.com/straight...cond-club.html

Thanks for the correction.

boxmonkeyracing · 05-09-2012, 04:59 PM

Quote:

Originally Posted by Deki

Well, you're comparing a car that's running a 335 rear, weighs 800 lbs less, and has more power. Apples and oranges. In a ZR1, I can see it happening. A little tougher to see that happening with the ZL1.

Yes I know the differences. But it is still not a far stretch for a 1.69 60'. that's the point. on a good day, track prep, driver mod, and lowered air pressure in the tires. it is very possible. unlikely, but possible.

JusticePete · 05-09-2012, 05:02 PM

Quote:

Originally Posted by 8cd03gro

I didn't say anything about drag radials and I agree the statement is ludicrous. It's just curious to me how some of the people that have the least confidence in the G2 tire are the ones getting mad when other people are surprised they ran a 1.6X 60'. Meanwhile a car in negative DA on slicks and skinnies is also running a 1.6 60'.

I thought it was stated the launch control wasn't used on these runs? I could be wrong though.

The drag runs were done on GYs and DRs. They were done with Launch Mode and without. They were run by multiple drivers. Hands down the most consistent times were in launch mode. Could a particular driver launch faster with the system off? Yes, but is more probable that the majority of drivers would be slower.

Launching a ZL1 with the TC/SC off gives you a window of maybe 200 RPMs, depending on the track and tire temps as well as the track prep. With good track prep and the right tire heat if you hit the window just right you'll have minimal spin and a perfect launch. Miss the window on the low side by 50 or 100 RPMs and you'll bog as the GYs bite is so great. Miss it by 50 or 100 on the high side and you'll smoke the tires. Seat time is the key.

As a side note the new differential, the increase in density in the front sub-frame bushes, the change in the toe links to rubber encapsulated rose joints, the new differential, the asymmetrical half-shafts, the new rear sway bar geometry and the GYs it appears that wheel hop is not an issue with the ZL1 in any computer mode.

LOWDOWN · 05-09-2012, 05:54 PM

Quote:

Originally Posted by Rice Killer

PTM was not used. Inside Line contacted GM regarding the argument of slicks or no slicks. GM responded no slicks and manual was without PTM. Link below.

http://blogs.insideline.com/straight...cond-club.html

Selective hearing is a property my wife has. Selective reading/comprehension exists EVERYWHERE...

From AutoLine (which isn't a "line"): The automatic transmission equipped car ran the 11.93, but the manual which ran 11.96 did so without launch control.**

So, folks, the 11.93 was WITH PTM...

capnkirk52 · 05-09-2012, 06:20 PM

Quote:

Originally Posted by JusticePete

As a side note the new differential, the increase in density in the front sub-frame bushes, the change in the toe links to rubber encapsulated rose joints, the new differential, the asymmetrical half-shafts, the new rear sway bar geometry and the GYs it appears that wheel hop is not an issue with the ZL1 in any computer mode.

http://www.camaro5.com/forums/showthread.php?t=218407

Number1Gmfan made this run a couple weeks ago. His car had wheel hop. He did cut a 1.89 60' on stock rubber though.

Rice Killer · 05-09-2012, 06:37 PM

Quote:

Originally Posted by LOWDOWN

Selective hearing is a property my wife has. Selective reading/comprehension exists EVERYWHERE...

From AutoLine (which isn't a "line"): The automatic transmission equipped car ran the 11.93, but the manual which ran 11.96 did so without launch control.**

So, folks, the 11.93 was WITH PTM...

The auto doesn't have launch control and I don't think active handling would apply to a launch...

JusticePete · 05-09-2012, 06:50 PM

Quote:

Originally Posted by capnkirk52

http://www.camaro5.com/forums/showthread.php?t=218407

Number1Gmfan made this run a couple weeks ago. His car had wheel hop. He did cut a 1.89 60' on stock rubber though.

Maybe I missed the burnout, but DRs or GYs need heat to launch hard.

LOWDOWN · 05-09-2012, 07:12 PM

Quote:

Originally Posted by The IOM Ninja

It's 3rd Gen Magnetic Ride Control not 2nd

Just saying.......

The MRC system employed on the Camaro is an updated version first used (directly) on the CTS-V...ergo, my (apparently to the 500 fans) errant reference. In GM's total history, Gen-3 MRC is correct. Which also helps explain why it's specific attributes, dialed in for the ZL1, may lend assistance in it's excellent 60' times...

ZR1s were mentioned. 51-49 distribution (same as a ZL1!!). 3353 lb. Curb. Almost 400 fewer lb. over its 335s than the ZL1 plants its 305s with...

Ever wonder why, in the "old days", 6- and 9-passanger Wagons in Stock and Super Stock pulled such wicked 60' times? Extra weight over the rear wheels...

Here's an O/Stock-Automatic 350-255hp Impala Wagon...(NO transbrake!) pullin' daylite...

BTW, good luck with your Shelby in Sherwood...

GoldenBear · 05-09-2012, 07:30 PM

Quote:

Originally Posted by LOWDOWN

Here's an O/Stock-Automatic 350-255hp Impala Wagon...(NO transbrake!) pullin' daylite...

I can recognize a 1969 Impala even at the drag strip.

LOWDOWN · 05-09-2012, 07:32 PM

We'll let the engineering speak for itself...

The 2012 ZL1’s six-speed automatic transmission delivers a 0-60 time of 3.9 seconds – a tenth of a second faster than the manual transmission time.

By staging hydraulic pressure in the clutch for the next gear, the new control module algorithm reduces tap delay for the 1-2, 2-3, 3-4, and 4-5 up-shifts by 200-300 milliseconds. The system anticipates shift requests based on current gear, throttle, torque and speed.

Source: http://www.torquenews.com/119/2012-c...e-exhilarating

05-09-2012, 04:54 PM	#563
Rice Killer Cooter Drives: my wife crazy Join Date: Oct 2011 Location: SW WI Posts: 569	PTM was not used. Inside Line contacted GM regarding the argument of slicks or no slicks. GM responded no slicks and manual was without PTM. Link below. http://blogs.insideline.com/straight...cond-club.html __________________ #1451 - 2012 ZL1 - White, Black Wheels, Manual, Suede Package, and Exposed Hood Insert. Delivered on 6/20/12. Thanks to Jason from Symdon Motors in Evansville, WI.

05-09-2012, 04:56 PM	#564
8cd03gro Drives: 2005 STi corn fed Join Date: Jul 2008 Location: Colorado Posts: 2,997	That's what I thought. As far as needing a really good driver to benefit from drag radials stock, well I'd consider anyone running a 1.6X 60' on stock street tires a really good driver.

05-09-2012, 07:32 PM	#574
LOWDOWN Downright Upright Drives: Daily Join Date: Apr 2009 Location: Cruisin'... Posts: 4,145	We'll let the engineering speak for itself... The 2012 ZL1’s six-speed automatic transmission delivers a 0-60 time of 3.9 seconds – a tenth of a second faster than the manual transmission time. By staging hydraulic pressure in the clutch for the next gear, the new control module algorithm reduces tap delay for the 1-2, 2-3, 3-4, and 4-5 up-shifts by 200-300 milliseconds. The system anticipates shift requests based on current gear, throttle, torque and speed. Source: http://www.torquenews.com/119/2012-c...e-exhilarating