X25

GM is pretty proud with their calibration improvements, and I'm sure it had a lot to do with the very warm reception of 2017 GS by magazines, since it already came with core of the track calibration. One thing that I am bummed about is that no magazine really put 2017+ Z06 w/Z07 to a similar track test, which also comes with these calibration improvements. More information on this can be found under "Ask Tadge" section here:
My question: Which one do you think would be the better track setup in terms of suspension handling?
(Please ignore CCB brakes difference, since most change it for heavy track use, anyway)

• 2017+ M7 Z06 with Z07 (with the updated track magna ride calibration)
• 2017+ M7 Z06 with DSC (and no Z07)

My take/guess: Z06/Z07

• Stiffer is better in my personal opinion: I have a feeling that Z06 w/Z07 would be the best setup with much stiffer front springs and stiffer-valved shocks, which aligns with my personal preferences on other cars for track use. The rates are 190 N/mm vs 117 N/mm front (Huge increase), and 177 N/mm vs 145 N/mm at the rear. 2:39 at VIR (time provided by GM) also shows quite a bit of improvement. I think this setup would be the most potent setup for a track Corvette (ignoring ZR1).
• ABS / Stability / PTM calibrations: Z07 comes with Cup 2 tires and brakes with very high initial bite, which are very similar to what everyone does at the track. As such, GM must have revised all calibrations of such driver aids, which might mean less chances of ICE mode, PTM allowing more from your tires out of corners, etc. I'm sure it's not Bosch Race ABS, but I'd also hope that the differences in calibrations would improve the experience.

What do you guys think? Has anyone tried both Z06/Z07 and Z06 with DSC at the same track?

X25

Any opinions?

Poor-sha

I don't think anybody knows. I think some of this will depend on the driver and track. Where the DSC really shines is in the quick transitions, under braking, and getting the power down. In theory, softer springs will give you more range for adjustment as long as the shocks are able to keep up. However, in the end I liked on track my 2017 Z07 with the DSC better than my 2015 Z06 with DSC and was faster in the Z07. Some of that could be driver improvement over time though. I drove a 2015 Z07 without DSC and my 2015 Z06 with DSC on track back to back one time and was amazed at how much better the car felt with DSC. Less pointy and put the power down better.

That said, the suspension tune in my 2019 ZR1 is pretty good and it'll be interesting to see how much the DSC improves on that.

Newton06

I don't think these changes were baked into MY 2017.

The dealer performed this update on my 2018 Z06 Z07 which had a build date of 08/17.

I noticed n improvement in touring mode, not so much in track mode.

Poor-sha

Yes, you are correct. That is why I brought up the ZR1 because it has at least the same calibration approach. Bottom line is I don't know anyone that has done exactly the requested comparison so I was trying to infer from other like experience.

3 Z06ZR1

A nice thing with the DSC is when you go hard it seems to throw weight to the back on the rear tire. I for sure get better grip than with out the DSC . My 60ft has to be much better. Haven't had the chance to drive it at the track yet.

X25

The 2017 Z06 cars already have the new track calibration except the temp/heat compensation. As such, his comparison should work (Stock 2017 Z07 vs older Z06 with DSC). However, it also brings another point that DSC can also improve Z07 cars, possibly to a position better than both. Previously, I thought DSC as a company only cared about tuning the regular Z06 cars.

Going back, I'm surprised that you didn't really like the 2017 Z07 stock handling, but I also wonder if it has to do with the different character it would have than DSC, since they implement different tuning philosophies and strategies. I would ask the changes in lap times, but I suppose that would be misleading since you were trying to get used to the new car, too.

Thanks for the information! Perhaps the best handling Z06 option is the hybrid approach of Z07 with DSC, which is something I could test if I go ahead and buy one : )

Poor-sha

My back to back comparison that I commented on was a 2015 Z07 without DSC and a 2015 Z06 with DSC. I really didn't track my 2017 Z07 much before I put the DSC in (I think it was a day) so I just don't remember much about it. I think it's safe to say that whether you have Z06 or a Z07 the DSC controller is an improvement. I also think that a Z07 is better than a Z06 for track use.