C7 Corvette

[GoCougs]

Yes the Auto Corvette is faster than the Manual, that's why it's a more apt comparison to a PDK 911 S.

Basically he was asking why the 911 trapped so much higher than the GS with less power.  Part of it is the Auto vs manual and the other part is the aero.


The Stage II aero package definitely shaves a mph or 2 off the top.  Since the difference is mostly in the last few moments of the run, the change in ET is minimal.

Look at the base C7 vette 7M
http://www.caranddriver.com/reviews/2014-chevrolet-corvette-stingray-z51-manual-long-term-test-wrap-up

vs the GS

http://www.caranddriver.com/reviews/2017-chevrolet-corvette-grand-sport-manual-test-review

The GS nips the base Corvette by a 10th to 60mph, due to larger stickier tires. 
They tie in the ET, but the base C7 is traveling just a bit quicker.

Then the C7 just murders the GS from then on out.
C7 0-150:  20.7 sec
GS 0-150: 24.1 sec

In more detail it looks like the C7 and are neck and neck till 100mph, building it's lead faster as speeds increase

            C7                GS                Diff
0-70     4.8               4.7                -0.1
0-80     6.0               6.1                +0.1
0-90     7.2               7.3                +0.1
0-100   8.6               8.7                +0.1
0-110   10.5             10.8              +0.3
0-120   12.5             12.9              +0.4 (1/4 Mile happens somewhere around here)               
0-130   14.7             15.5              +0.8
0-150   20.9             24.1              +3.2 (C7 murders the GS from 130-150, as expected with aerodynamic drag being the square of speed)

Z51: http://www.motortrend.com/cars/chevrolet/corvette/2014/2014-chevrolet-corvette-stingray-z51-first-test/
1/4 mile: 12.2 @ 117

Grand Sport: http://www.caranddriver.com/reviews/2017-chevrolet-corvette-grand-sport-manual-test-review
1/4 mile: 12.2 @ 117

A couple of tenths and a couple of mph is well within the noise; drivers, tire condition (esp. on testers), track condition and atmo conditions (normalizing algos are only estimates) yield a certain process window to account for factors and variation.

This comparison plays out with other such aero packages such as the GT350 vs. GT350R; i.e., no discernible difference in 1/4 mile performance. The trap speeds would have to be huge and the aero package very aggressive (the likes of which you'd never see on the street) to make a difference. For example, simply look at the various NHRA classes. The lower classes, which are vastly quicker than any street car (9 - 10 sec 1/4 mile), are relatively agnostic WRT aero - simply look at the cars - anything from a '50s shoe box to a '70s Corvette to a modern Camaro or Mustang. If aero made a material difference, each class would regress toward a specific body style.

The 911 is far quicker in the 1/4 mile than the Corvette despite having lower power/weight ratio, because of PDK, rear engine chassis, and a bit shorter gearing in 4th.

[12,000 RPM]

Looks way more badass as-is

[Eye of the Tiger]

That is a needlessly complex, but cool spoiler thing. But a horrible gif.

[CaminoRacer]

But when it's parked you don't see anything. Unless it does that constantly. That'd be cool.

[12,000 RPM]

They should make it do that whenever you lock/unlock the doors.

[68_427]

They should make it do that whenever you lock/unlock the doors.

If the car is in sport or sport+

[Gotta-Qik-C7]

Simple on/off button will suffice.

[Gotta-Qik-C7]

Grand Sport Makes the 10 best list! Along with the Camaro and the Bolt. Good job GM.....
http://www.caranddriver.com/features/2017-10best-cars-the-best-cars-for-sale-in-america-today-feature

[Gotta-Qik-C7]

http://www.caranddriver.com/news/2018-corvette-stingray-zr1-spy-photos-news

[CaminoRacer]

A 4 cammer and flat-plane crank doesn't really make sense IMO. That's not Chevy's thing.

[12,000 RPM]

Flat plane crank would be awesome

Kind of funny how the Viper died for being too extreme, and now the Corvette is becoming super extreme. They might as well call this thing the Corvette ACR.

[MrH]

  This is just one model in the entire Corvette lineup.  A Stingray with magneride, leather interior, and an automatic is a pretty plush car.

[GoCougs]

As the GT350 has shown, the flat plane crank stuff is for the name only - materially, it's DOA as evidenced by the decade-old LS7 let alone the upcoming Z28 motor - it's only for stratospheric levels of HP.

The Viper's problem wasn't that it was too "extreme" it's that it was purposefully crude and harsh and terrible to live with. The Corvette is the opposite of that, in all incarnations.

Specific to this car, the C7 Z06 has enough issues putting power down (as did the C6 Z06 and C6 ZR1 before it). I can't imagine another 100-150 hp is gonna make that any better. Either way, the C7 Z06 has been a big sales success, and that's what it's all about.

[12,000 RPM]

  This is just one model in the entire Corvette lineup.  A Stingray with magneride, leather interior, and an automatic is a pretty plush car.

Not the whole lineup, just certain iterations

Z06 has it bad enough, ZR1 is either going to be a track day only special or a GT500 style mess

[MX793]

Other than difficulty putting all of the power down, the Z06 is reportedly pretty comfortable and docile when driven at speeds that won't get you arrested.  Not really any worse than a regular Vette.

[Raza]

Grand Sport Makes the 10 best list! Along with the Camaro and the Bolt. Good job GM.....
http://www.caranddriver.com/features/2017-10best-cars-the-best-cars-for-sale-in-america-today-feature

No car this ugly can be the best of anything, because setting your eyes upon it may cause a Medusa-like petrification.

[RomanChariot]

No car this ugly can be the best of anything, because setting your eyes upon it may cause a Medusa-like petrification.

GM must be doing something right to cause you to get hard looking at one of their cars.

[CaminoRacer]

Other than the grill I like it. Or at least, I don't mind it.

[Cookie Monster]

GM must be doing something right to cause you to get hard looking at one of their cars.

[Raza]

GM must be doing something right to cause you to get hard looking at one of their cars.

You've always got to work blue, don't you, RC?

[RomanChariot]

You've always got to work blue, don't you, RC?

It was too easy to pass up. I actually think the Bolt has the potential to be a good seller for GM. The people that I know who have Chevy Volts really seem to like them and the Bolt has the potential to have a broader appeal.

[12,000 RPM]

Bolt does not look CR-V enough to move units.... that's the only safe bet these days.

[GoCougs]

The Bolt's biggest challenge by far is that it is made by Chevy. In feature/function/performance I have little doubt that it will be ahead of Tesla Model 3, however, Si Valley types and wannabees are bound to have issues with the MURICANISM of a Big Three brand.

[12,000 RPM]

I think that could be its biggest asset. Volume wise Si Valley and the techy PNW is insignificant. If they can sell these to commuters they will have something to talk about.

Industry really needs to coalesce on a standard charger though. It's getting ridiculous

[68_427]

The Bolt's biggest challenge by far is that it is made by Chevy. In feature/function/performance I have little doubt that it will be ahead of Tesla Model 3, however, Si Valley types and wannabees are bound to have issues with the MURICANISM of a Big Three brand.

Also consider Tesla will begin to charge you (HUEHUEHUE) for using it's superchargers. 

[CaminoRacer]

/DRIVE is reporting that a GM doc included a DOHC V8 on some official documents. It's a Y-code (Corvette only) and named the LT5.

With the mid-engined rumors and spyshots, I think they're making a Ford GT competitor that'll use the LT5. Could also be used in a ZR-1. We'll have to wait and see.

[Gotta-Qik-C7]

 

[Gotta-Qik-C7]

The $19,000 2014 Corvette............
http://www.corvetteforum.com/forums/c7-general-discussion/3909500-just-purchased-a-2014-c7-1lt-flood-car-or-is-it.html

[GoCougs]

If you look further down in the document the Corvette does not show the "LT5" as an option.

To "compete" with $100k+ hard core performance cars these days you need either very light weight or 600+ hp. The former is hard, the latter is easy, and GM already has the 650 hp LT4 cued up, plus let's also not forget GM was getting 505 hp out of a pooprod V8 a dozen years ago (with today's tech, a DOHC V8 would have to be at 600+ hp to best an equivalent pooprod).

A 3,200 lb ZR1 powered by a 600 hp DOHC N/A V8 sounds just a bit too exotic for GM. Not impossible, given GM's recent track record with performance cars, but such a vehicle is super car territory. It would be interesting but I'm gonna guess the "LT5" is vaporware.

[CaminoRacer]

911 GT3 lapped the Hockenheimring in 1:08.5, only 0.2 seconds quicker than the GS.

http://www.youtube.com/watch?v=I344iiAK4IY