ZMMMMM

It's both brakes AND accelerator slammed to the floor, as illustrated in this video. This car might have ALL nannies turned off...
BTW, one of my favorites is GP (good point).

driver9

I vaguely remember some kind of electric braking system that JC Whitney sold in the '60s where you could lock up the front wheels only. It was controlled by a button that they showed mounted to your shifter. Never saw one of these in person though.

This "brakes AND accelerator" slammed to the floor technique seems like a little more than I'd be willing to put my car through. Must be tough on the rear brakes and maybe a little tough on the torque converter and drivetrain.

Thanks for the lesson.


Regarding "GP" -- thanks again for defining it. IWHNGWIMO. (I would have never guessed what it meant otherwise.)

djnice

There is more to the story.

You guys need to get out and just try this stuff. With TC off and AH on you can get the car pretty sideways. You can also overpower the TC and AH use of the brakes. You can also get it to snap into a slide quicker than the system can react.

Light pressure on the brakes is all that is needed to keep the spin going and reduce forward speed like the guy in the video is doing.

It is called a line lock. People that drag race install them all the time. Some mfg's are including them now such as mustang, challenger, etc. As I recall, there was a big issue because Ford put it on the car, but then voided warranty if you used it on a drag strip.

sunsalem

I'm glad someone pointed out the Z is traction-starved even with the TC turned on.

LATSWATDA...(let's agree to stop with all the dumb abbreviations).

village idiot

djnice

Spinning it is easier in cold temps. It is 16F here at noon today. So wonderful.

Another factor that can contribute to crashing these things in a scenario that the OP posted about, is the eLSD. When you turn nannies off, the eLSD is still doing it's fancy business for which no one seems to know the algorithm. In a fishtail scenario with yaw pitch changing rapidly the eLSD could misjudge, and cause additional oscillation. I have experimented with this too. Also, the car could have a malfunctioning eLSD and never throw a code so GM doesn't know how to fix it. I have experience with this too.

So the OP's friend could claim the car malfunctioned. Who could prove otherwise?

sunsalem

It's not that tough to spin (or lose control) of a Z06.
We've seen evidence of that kind of thing on YouTube.

NSC5

The nannies are very good at controlling the Z when someone pushes it a little too far but they are designed to ASSIST a reasonable driver and not make the world safe from a total moron. If you try to enter a hairpin turn on the Tail of the Dragon at 140 MPH you are past the point where anything can control the vehicle (well anything except the solid rock side of a mountain). If you accelerate a little too hot with cool tires on a cool surface it will get you back in line. But if you nail the throttle on cold tires on a crowded street you are likely to be into something before the control systems can unwind your stupidity. The torque from a Z06 will result in behavior you won't generally see with a naturally aspirated or even the typical turbocharged engine which won't have the near instantaneous availability of diesel engine like low RPM torque.

Remember, the slang term for these protective systems is "nanny" and not God. Like a children's nanny they help keep children in line but they can't always overcome a determinedly stupid adult.

sunsalem

Well said.

village idiot

Yes, it's traction control, not traction boost. All it can do is manage the traction you have, not add additional traction. It can straighten you out or cut throttle when you are on the gas too hard, but it can't add more front grip when you're lead footing the brake into a turn you took too hot.

With that said, it's hard to **** up a drag race with AH on.

Norse

So much for the break in period.

JHEBERT

She just had the oil change, it’s broken in
5500mi now and runs like a raped ape

village idiot

more importantly, I learned I can actually have numerical gauge readouts instead of some stupid ******* gauge that is impossible to read. Tour mode will be my new track mode.

djnice

The numerical readout on the track gauge is a plus for buying an 2018.

Bill Dearborn

True in some of Corvette's Competitors over the years but they active handling and traction control have been able to be turned off since the Corvette started having those features installed. Newer competitors allow the same thing now. For instance on the C5 you could turn off TC, leave AH in its normal mode or put it in Competitive Mode which let the car move around more. Same went for the C6. Then during the C6 years they developed PTM which is very sophisticated. That was carried over to the C7 cars that have MRC. With PTM you get extreme stability control and traction control in Wet Mode, less in dry mode, a sort of competitive mode in Sport1 without any traction control but still have PTM (performance traction management). In Sport 2 all you get is PTM and in Race all you get is PTM. From a throttle standpoint any of the modes below race dampen the throttle change and in race you don't get any dampening. Dampening isn't a limit on Horsepower but on how rapidly the throttle will open and close since closing throttle can sometimes be trickier for an inexperienced driver than opening the throttle. Sometimes that get away from it moment is brought on when a driver slams the throttle open, starts to slide, lifts their foot all the way off the throttle which then causes the car to loop around. That is what they call trailing throttle oversteer and large cubic inch engines (especially in the lower gears) can basically turn a car around if you take your foot off the throttle in the wrong manner. That so called safety valve of lifting that can be done on lesser cars isn't always available on any Corvette unless it is the old 53-55 6 banger.

You need to know how to drive and considering that 99.99999% of US drivers have no clue what that means there is a lot of trouble when they get behind the wheel of a car that does what they tell it to do when they tell it to do it. Even when they didn't mean to tell it to do what it is doing.

Bill

village idiot

Yeah, I have a 2017 and the most dangerous thing I can do is try to figure out my engine oil temp.

djnice

Don't know why they can't update the 17's.

village idiot

Foosh

I know, as soon as I turned the dial to Track mode on my new '18 and saw that numerical readout of all important parameters, Track display mode became my all-the-time setting regardless of driving mode.

I'm also using Track/PTM Wet as my almost all-the-time winter setting in daily driving since it keeps MSRC in Tour mode and it keeps both TC and ESC fully engaged. It is remarkable how it only puts down the right amount of power to prevent wheel spin, without being intrusive.

djnice