PeterF

Hi All, I am new to the Corvette World. I just bought a 2017 Grand Sport 1LT trim. I am planning on tracking the car a lot (I also have a 2014 Porsche 911 S that I track a lot). Anyway, I am trying to figure out the driving modes; it all seems pretty straightforward (the different PTM options in Track Mode). BUT, the manual talks about a Competitve Driving Mode that is accessed via Sport Mode. It says that some cars may not be equipped with Competitive Driving Mode.. So I have 2 questions

1. Is there a separate Competitive Driving Mode, or would I activate this model in Track by pressing twice quickly on the drive mode selector and then entering into PTM? or is it simple pressing twice and removing traction Control and Stability Control? I am concerned that my car is not fully equipped for track driving

2. Performance Shifting . I have an automatic (now I wish I got a manual, but I got this car for a great price), I have read about Performance Shifting and when one steps on the gas an indicator light should go on when you are in Sport or Track that indicates that you are in Performance Shifting. There is no light when I do that. The car immediately downshifts, but it does that in all modes, also it doesn't shift down when I brake to turn. The manual notes that drive modes MAY include a Trans Shift Mode (if equipped) and there is a SPort and Track transhift mode in utilized in those modes.

DO all Grand Sports have this trans shift mode for Sport and Track, or might some not have that. I am concerned that my car does not have that and I want to find out how I can determine that

any help is most welcome
thanks
Peter

Vetteman Jack

Your questions are best answered in the C7 section, so I’m moving the thread to C7 General.

And welcome to the forum.

kennyjames21

If you are in sport or track mode, the performance shifting works automatically, on all grand sports. The competitive driving mode you are talking about determines what nannies (traction control, etc) are on or off.

TXshaggy

You don’t have the competitive driving mode; all your performance driving options are PTM. While in Track press the center console button twice to enter the 5 PTM modes.

pnsnkr

Performance Shifting is only applicable when the transmission is in 'D' and only when WOT. Not applicable when in 'M.' Another 'cool' feature is to press and keep the downshift paddle pressed when in 'D' to directly downshift to the lowest allowable gear. While I haven't done this myself, quite a few posters have stated that this results in a '****-your-pants' memorable experience - as in, you ain't ever gonna forget it.

Mobil 1

Won't work in "D", must be in "M" . For example if I'm doing 40mph and I am in "M" and hold down the left paddle for about 2 seconds the trans will shift to 1st gear and the computer will rev to match the speed for 1st. My wife says I make the car sound angry. It is F'ing cool.

redman76

Rest assured, your GS has everything you need for the track.

Sixgun95

What would be the practical purpose for doing this?

Skid Row Joe

Does your car have MSRC?

Kvou812

You can also activate performance shifting by quickly pushing the accelerator to the floor and releasing while you drive.... this will also downshift usually to the lowest possible gear.

With the Grand Sport, as stated above you have PTM (Perfomance Track Management) instead of competitive mode.

Some helpful videos...

Performance shifting:
PTM overview:

Kvou812

Something like another car pulling beside you to race or a pull from a roll. The transmission would already be downshifted and performance shifting activated

Mobil 1

I guess you would have to ask the engineers who programmed it.
I use it all the time.

Kvou812

Since the OP has a Grand Sport, then yes he has MSRC

Wgg2017

The GS doesn't have competitive driving mode. That's only available on the Corvettes without MRC (Your GS has MRC, magnetic ride control) and isn't as sophisticated as PTM mode. The link below will explain everything you need to know about performance traction management (ptm mode). It comes from the Ask Tadge section of the forum and is basically the engineering team telling you how the car works.

How PTM Works

Edited to add:. There is a TON of great info in the Ask Tadge section. Could spend hours going through all of his responses.

Sixgun95

Yes it does.

TXshaggy

Work on your reading comprehension, OP said he had a GS...good grief.

V Vette

Do the Z51 and GS share same track modes, same engine etc? Are they the same car except for cosmetics? Thanks

L82Brake

Yes, Yes, No.

https://www.corvetteforum.com/forums...randsport.html

pnsnkr

Thanks for the clarification; I had it backwards. I shoulda RTFM The manual states that this can also be done in 'D' provided the transmission is put in temporary 'M' shift mode by hitting downshift paddle once and then holding down the downshift paddle.

It's similar to selecting a specific gear to hit the RPM sweet spot in an M7. The A8 is sequential by design; but this feature allows this to be bypassed. The only difference being that the computer selects the appropriate lower gear instead of the driver.

The following information from the manual is useful to calibrate yourself on the target gear that will be selected for a given vehicle speed: