TSLAVette

Only had 188 miles on it. In a sport mode, was certainly quicker than my current GS but not sure it felt 190hp/TQ different. My assumption is it’s still in break-in and the full power band has not been opened? Boost indicated 11-12 pounds and could be felt most around 3500 rpms.

Was break-in my issue?

tzoid9

One would have to believe that the acceleration rate/seat of the pants type reaction would be substantially greater in the Z06. The horsepower and torque ratings on the Stingray are just south of 200 units less than the Z06...or put another way, the Z06 has 40%+ more horsepower and torque than the Stingray. Those numbers are substantial in a 3500 lb. car. Somebody on the Forum will undoubtedly know the answer as to whether the electronics in the Z06 reduce power during the break in period. The other unknown is what kind of fuel the dealer had in the car you demo'd....Corvettes (both Stingray and Z06 models) will detune themselves if the octane rating is not high enough for the engine...the Dealer yard guy responsible for cleaning the cars and such for the salesmen, may have put regular in by accident or because he/she didn't know any better.
Maybe your expectations were set too high, who knows. Be that as it may, the Z06 is considerably quicker than the Stingray, stock vs. stock.

Blue Time

I don't know if it is true or not, seen this in a video. Vengeance had a Zr-1 and dyno it when new -down a 100 horsepower - after 500 mile break in, the 100 was back. Is it part of GM's break-in, only they would know.

Zjoe6

On a track on the straight they pull ahead pretty quickly. Was with a couple of them last Tuesday at Spring Mountain. I was in a Grand Sport. In the technical stuff I could keep up no problem. On the straight fagetaboutit.

SLEEKVET

^^^^^ I agree. I took mine to the 1/4 mile track with about 1,000 miles on the car... ran low 11 seconds around 125 mph all day long. Its quick and now that it is broken in (9,000 miles), it actually feels even faster to me...

dvilin

I did not jump on my 2019 Z until after the 500 mile breakin period and oil change. After that I can say compared to my 2015 Stingray it was a beast. I could not believe the power difference. It just pushes you back in the seat, the *** end is trying hard to break loose and the tires are searching for some grip. That baby is screaming and man just keeps on pulling. Anyone who has been in the passenger seat has the same holy **** reaction.

cvp33

Not sure what may or may not of happened with the specific Z06 that you test drove - break-in, traction control, etc. I had a CTS-V coupe and test drove a GS. I felt dead inside. Absolutely no torque in those things by comparison and just sluggish. That was comparing 556. 650 is totally different and better.

MiamiCowboy

I have a C6 Z06 and my 2019 Z06 is an absolute animal in comparison. There is a definite 145 HP difference. It puts me deep in my seat back on acceleration.

Bill Dearborn

The HP and Torque Specs don't mean a lot when the throttle isn't wide open throughout the rpm range. Did you go wide open throttle at all? With less than 500 miles you shouldn't be revving it over 3500 rpm per GM's break in guidance. However, you should feel something from 1000 to 3500 if you go wide open.



Was it an A8? Not sure what you mean by the statement in a Sport Mode. With the Z51 and GS M7 cars you also get a transmission that uses lower gear ratios in the first 3 gears so that helps compensate for the lack of performance around town. You need to try it in 4th gear where the gear ratios are identical and you will see the difference if you use wide open throttle. No wide open throttle and you really won't notice all that much difference because you will open the throttle differently in each car.

If the car's are both A8s then you have to put the transmission in manual mode and choose a transmission gear that is close to 1:1 in both and hope the axle ratios are the same for the two cars. Then do the wide open test from 1000 rpm.

Bill

TSLAVette

Hehe ... love it!

mdolandese

Drove them both. Z to GS NO COMPARISON from what I've experienced when I test drove both

Sub Driver

There is nothing that limits power during break-in. That is a myth and has been proven wrong with multiple dyno runs before and after the 500 mile mark.

falcon5619

If they are both M7s then you need to take the gear ratios into account. The GS/Z51 gear ratios are quite a bit lower than the Z, which acts as a torque multiplier in the lower gears. However, once you get up to speed a bit the Z will pull much harder. Personally, I like the feel of the shorter ratios on the street as you get a little more opportunity to wind out a gear. In the Z, 2nd gear is good for like 93mph, which is awesome and frustrating at the same time if that makes sense.

tzoid9

Unfortunately you got what you got. 93mph in 2nd gear, I never tried that one on the highway. I'm just too easy....I like it just the way it's made. I just hope the A8 transmission stays together. All those comments about how terrific the A8 was are BS.....it's still a GM slush box just like the previous ones, unless you have your foot buried on the floor board. Dodge trans far superior and nothing's better than a twin clutch.

TSLAVette

makes perfect sense! Both were A8s

falcon5619

The A8 transmission gears are the same between the GS and Z06 but the rear end gear is slightly different. The GS uses a 2.73 and the Z uses the 2.41.

I had an A8 trans in my Camaro SS. I liked it at first but then I just started getting bored and the paddle shifters weren’t doing it for me. I hear the A10 in the ZL1 is pretty good but I think I will wait for a true DCT before I consider an auto transmission again.

As for the performance difference between the GS and Z06 it sounds like you felt the difference but your expectations may have been set much higher.

SamsGS

I agree. I sold my 18 GS A8 and ordered a new 2019 Z06 Conv. Also an A8. While it’s its faster, has more noticeable mid and bottom torque, it really doesn’t feel that much faster. Nothing like what I have read on here. I was expecting so much more. It’s totally controlled and tracks perfectly straight. It’s realky fast. But honestly I was a little disappointed that it really doesn’t feel that much faster than my 460 hp GS was. Don’t expect too much. They aren’t fast after 140 and they have a weird hesitation in drive on the hiway when you punch it. Fast for sure. But not scary or all that bullshit I always hear on here.

tobaccokid

No comparison between the two

hcvone

Also MANY dealerships put regular unleaded in yes even Z06's and ZR1's when delivered, this will give you a real feel of under performance

LarryFL

Amazing to me a dealer would ruin a buyer's initial experience, and also violate the owner's manual instructions (91 required) just to save $5 to $6 on a fill up on a 70-100K vehicle.