I have a new to me 2017 Grandsport and was in wet mode on a rainy day, curious how the mode handles power inputs in slippery conditions , gave the car a blip of the throttle, car was almost sideways instantly. Is this normal? I have driven bmws and Porsche’s with traction control and both prevent the tires from slipping. Is this normal for the vettes? It does not really seem to do anything?

 

Try PTM Wet mode. Much better in the rain.

 

At Ron Fellowes you could not make the C7 even slip on a wet skid pad in Weather mode....

 

^^^ That was my experience.

 

In any mode other than WET, the TC is going to give you a little room to slip before it kicks in. You can for sure get sideways with throttle inputs on a wet street.

 

At Ron Fellowes I was able to make it slip several times. It wasn't really that hard to do but you could tell that it does help a lot in the rain.

 

Also depends on the tires. The OEM tires are slippery in the rain. The Michelin A/S 3+, and I assume others, are much better on wet surfaces.

 

You mean you were able to spin out, which takes an especially ham-handed approach to driving. Bravo

 

What a jerk-*** answer to someone trying to get some input on his new-to-him Vette.

Doug

 

Weather mode reduces throttle input, if you floor it in weather mode in bad weather the TC will still kick in. The entire point of weather mode is to try and minimize throttle input so TC doesn't have to kick in as often but thats entirely moot if you still floor it. If you leave TC on, it will correct your lead foot but the back end still had to slide out first before it kicks in. You can try PTM wet for better intervention.

 

something wasn't right. are you sure the traction and stability control were on? when both are on and the computer senses wheel slip, it'll attempt to correct it.
for the car to go completely sideways, both would have to be off and you'd have to really be on the throttle (almost intentionally) to get it that way

 

Not sure of what tires you have and how hard it was raining...or what the temperatures of the air/pavement were...but if you have Super sports or other track related tires which are summer only run flats...I could easily see this happening due to numerous conditions that you have not described. Certain types of asphalt have less or more exposed aggregate which can make some more susceptible to being slippery...and a lot of roads tend not to drain well and you may have experienced more of a hydroplane than a slip...only you really know what it felt like...don't rely on a computer to keep you "completely" safe while driving. Only you know how hard you were pushing the car...the car's computer should have done better the way that you have described it "but" again only you really know. Summer only tires should not be on the road under 40 degrees outside per the manufacture....lots of us go against this on a nice day with a good bit of attention to a light gas pedal...personally I am tired of it and want to change to all seasons as there are plenty of great sunny driving days here in N. E. Ga. with no chance of snow or any salt on the roadways... Now that you have experienced the issue, and have remained without incident, I'll bet you have learned something and will be a bit more cautious next time...not a bit of insult intended at all man...I have a 2015 Z-51 A-8 with a few minor mods and no longer like my run flat Super Sports when it gets to down to approx. 40 degrees outside. I can beak them loose easily...and in any mode...not good in my opinion....got lots of friends that own older muscle cars that love to lay rubber!...not me...love to put face cheeks back by my ears...I'm gonna be switching to the all season run flats from Michelin as soon as I can afford to...consider your tires and temps maybe the issue,,,just a suggestion as you didn't state all of the conditions and were quickly bashed by some here on the forum who seem to enjoy the sarcasm of insult...by the way...do you remember being bullied /picked on ...on the school bus when you first started to ride it ???...I do...and as soon as I didn't give them a reaction...they stopped...so please ignore some here and continue to ask for advice and learn things about your Vette...what an awesome car man!!!

 

Wasn’t direct at OP, or you for that matter. Move along.

 

I agree I got the M7 Z06 I was driving at Ron Fellows to slip and slide especially in the figure 8 exercise where we drove on a water covered course laid out on a flat piece of asphalt. The car would slide quite a bit but was generally controllable and could be muscled around the course without spinning out. The last few circuits through the figure 8 I had either the front or rear plowing all the way around. Controlled slide.

Bill

 

IIRC from SM, the Weather mode limits the yaw departure to 30 degrees before it applies corrective braking/thrust.
Out of Weather mode, the car could easily be spun but with Wx mode on, it corrected even ham handed/ham footed inputs and kept it pointed in the general direction...

 

Why does anybody listen to that dick? I've added to my ignore list long ago and it's been a dead-on decision all along. Please stop quoting him. He has nothing of value to say. Put him on your ignore list too. You won't miss anything of value.

 

I'm confused...what is the point of "Stability Control" if the car can be spun out if not in Weather Mode?

 

So I did not floor it, just poked it a bit to see how it would react, definitely surprised me how much it squirmed, the temps were around 60 degrees, tires are stock grandsport almost new, I read in another post something about having to link the drive modes under settings to make the drive mode react properly, does that sound like a possibility? I really can’t tell the difference in any of the drive modes

 

It's simple - stability control *helps* to keep the car in control but it cannot perform magic when you apply the full HP that the car possesses.

Look at it this way, it'll keep you from spinning uncontrollably but not indefinitely. If you feel the back sliding out and you say "eff it" and just hammer the pedal to the floor the car will spin out. The purpose of stability control is to allow you to feel the car losing footing and give you the chance to cut back and not lose control. Or at least that's how I view it.

 

Weather mode is a more conservative function of stability and traction control systems that dials back throttle response and adjusts brake programming to help keep the car pointing the way the driver is pointing it... It adjusts the car's computers to account for the reduced friction of wet roads.

2019 Owner's Manual, pg 198
Traction Control/ Electronic Stability Control
The vehicle has a Traction Control System (TCS) and a StabiliTrak/Electronic Stability Control (ESC) system. These systems help limit wheel spin and assist the driver in maintaining control, especially on slippery road conditions.
TCS activates if it senses that the rear wheels are spinning too much or are beginning to lose traction. When this happens, TCS applies the brakes to the spinning wheel and reduces engine power (by closing the throttle and managing engine spark) to limit wheel spin.
StabiliTrak/ESC activates when the vehicle senses a difference between the intended path and the direction the vehicle is actually traveling. StabiliTrak/ESC selectively applies braking pressure to any one of the vehicle wheel brakes to assist the driver in keeping the vehicle on the intended path.
A student's PDR video of doing the SM Weather mode demo