Question about cornering...

Infidel

No VDC is always off unless it's raining.

diddy535

Honestly driving a Z is not the same as driving a police car. I've got the experience too and this thing isn't close to my impala. A little humility could go a long way dude.

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wstar

The short quick answer to your initial question is: yes, when exiting a corner at maximum lateral G's, the rear tires should be slipping, and no, that's not what's called "roll". The slip should be easily controllable with the throttle to keep the car pointed the direction you want it to go. "Roll" is when the suspension on the outer side of the car (not the direction you're turning towards) compresses down more than the inner side, causing the body to lean relative to the road. But really, I don't think answering that question really gives you what you're looking for.

No offense intended at all, but: I understand as an LEO you've probably had some driver training and experience, but you really should hit up an instructed HPDE track event in your Z to learn about cornering properly in it. Just from the language and the question you're asking, it's clear that it would be useful to you.

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DarkJak

I'm pretty sure police drivers training is much different from what they'd teach at a HPDE course. Easing into the corner loads your ourside suspension, which is why it's important to be smooth. If you are jerky then the weight doesn't transition and your outside wheels have lower normal force, which makes it easy for them to lose grip. Once the weight does transition though, your outside tires get loaded and as long as you aren't past the limits, this loading/additional normal force will allow them to grip again, which is probably why you feel that happening.
It's different from how VDC feels, since VDC is abrupt and pretty obvious when it activates in our cars.

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122554

You would not believe what you can learn about driving one of these by taking a weekend and learning from an instructor. This is not a Chevy or Ford!

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m4a1mustang

Eh? Pretty sure you could learn just as much in a Chevy or Ford at an HPDE.

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122554

Agree! Just meant the car handles differently.

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m4a1mustang

Gotcha.

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ElVee

Being a newbie, I actually know what you're feeling. I get the same behavior as well on a few corners I take, usually from a stop into a sudden left-hand right turn with some power, and I'll feel the back-end "slide" a little bit before the VCD neuters me (it's on, of course). The slight slip never becomes anything more than just that.

It's normal, and I have 4 reasons I feel it now and then:
- it's still cool here in the mornings, even below 40 degrees, which is the low limit rating for my tires.
- My tires are still new.
- The car is rear wheel drive; my first. It just feels a bit different than my previous cars, even when things are completely normal and safe.
- Lastly, I'm probably just surprising the VCD a bit; in most other cases, it takes over pretty much behind the scenes, though on some right turns that I roll into, it'll clearly neuter me pretty dramatically.


I echo the suggestion of a driver's course/training (which I also need to do this summer), but not because of an implication that you suck. Rather, because you can safely explore the limits of your car. That or take it to a place you can legally screw around on, like a large parking lot, and throw your car around. Try to feel that slipping and see what happens when you don't back off, and whatnot. Just be legal and responsible!


Oh, and usually I hear of "roll" in terms of body roll or body lean when doing a turn. Our car doesn't roll or lean (tip, tilt...) much during a big turn. An SUV, on the other hand, will roll (lean, tilt, even tip!) when in a tight turn at high speed. A nice example of a sporty car with lots of lean would be youtube vids of Mazda RX-5 Miatas going around a track.

B&W_Evader

I think this is pretty normal for a sports car. The back end will shift a little to the outside when cornering hard. If you go into the corner real gentle you won't even notice it. If you jerk the wheel, you might take it so far as a spin out. Late braking can make the feel much more pronounced as the back end will lift up and shift if you haven't taken your foot off the brake fully when initiating the corner. Putting your foot back on the throttle will put the weight back on the rear. Try baking a little sooner and changing over from brake to gas a little earlier. Do it a little smoother and you may find the feel much more comforatable. Also, pushing the car to this point with the VDC on is just asking for trouble in my opinion. Just don't mash the throttle.

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JARblue

If you're not talking about the rear tires actually losing traction, it is most likely you are experiencing roll (sway bars are probably the best bang for the buck here).

If you are losing the rear end and that's not your goal, it sounds to me like you are entering the corner incorrectly (driving course is probably best bang for the buck here). When I want to loosen the rear end, I would describe it as "throwing" the car into the turn - jerk the wheel and get on the throttle. Racing through a turn is completely different and all about the apex of the turn. As many have said, "smoothness" is key; you would never jerk the wheel at any point during the turn.

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blackcherry20

with Jar.

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Cheatham

I figured I would mention that I also experience this problem and drive a 2013. Not sure if they changed anything since I know very little about these cars. I've driven a range of different cars and have never experienced the amount of slip in the rear as I do with this one. I'm sure I am pushing it to hard on the corners but figured this car could handle it. I know that when it rains I have to nearly let off the gas when turning haha.

I'll also admit that I'm sure I would benefit a ton from a driving class. Maybe I can find one in Dallas this summer.

cossie1600

buy some real tires over the plastic re050, the car will grip a lot nicer. I sold mine at 800 miles or something, one of the best decision i made

Tazicon

Getting those off the Z was the best thing I did for it, but I have those on my Porsche and it handles like it is on rails. They are pretty worn as well. A lot has to do with car characteristics.

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