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Old 09-25-2016, 08:18 PM   #101
Blitzkrieg
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Originally Posted by KC View Post
On a racetrack with turns, balancing the car on the shifts and making the shifts happen - works both ways... it's great that the upshifts are faster than a manual. Can't be happier with that. Almost all cars have been programmed to make the upshift immediately when requested. It's a wonderful thing, if all you do is drive in a straight line and want to win the stoplight drag.

The bigger issue is the downshifting with many of the GM sporty automatics (or most automatics for that matter). It takes too long with a VERY discernible lag. WHEN you need it to downshift, it doesn't. Move the lever. Wait. Then it shifts. You have to estimate, to ASK the car to downshift and it will when it's damn good and ready, or you have to ask earlier than you really need it in the hopes it's done by the time you need it to be. Hence, this is there the manual (and DCT) wins vs the automatics.

--kC
This little piece of thought makes me wonder when they will make a hybrid autonomous car. Where human input determines the speed and driving input and the computer uses current autonomous sensors to predict the perfect gear way before you come to a turn.
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Old 01-31-2017, 12:36 AM   #102
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ZR1 and Mid-Engine C8 Corvettes Spied Together in Cold-Weather Tests

http://blog.caranddriver.com/zr1-and...c=socialflowFB
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Old 01-31-2017, 01:35 AM   #103
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I like the proportions of the one on the left.
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Old 03-23-2018, 08:29 AM   #104
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Default Will the Mid-Engine Corvette Use Twin-Turbo V8 Cadillac Power?




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The mid-engine C8 Zora Corvette is coming, it’s only a matter of time.
Bob Dylan famously sang that “The times, they are a-changin’.” That song was written in 1963. If only he knew how prophetic those words would truly be.

1963 also saw the introduction of the C2 Corvette. The C2 was, likewise, a sign of change for Chevrolet. The new generation of Corvette brought with it many updates and changes. A coupe model was offered for the first time, as was a Big Block Chevy V8. Oh, and a guy named Zora Arkus-Duntov was pushing the limits of the Corvette. His tinkering brought many developments to Chevrolet and the Corvette, such as disc brakes, fuel injection, and widespread use of the V8 engine. However, arguably his biggest developmental experiment was one that never made it to production: Duntov wanted a mid-engined Corvette.

Now, Duntov is finally getting his wish, it just took a little longer than anticipated

We have covered the C8 Corvette before. The nickname “Zora” has become synonymous with the mid-engined prototypes we’ve seen running around. Now, however, we have some very interesting news, albeit, from an unusual source.

Cadillac has developed a new engine
Cadillac has today announced an all-new engine. It’s a (relatively) low displacement V8, but you know what makes a good replacement for cubic-inches? Boost. The brand’s new 4.2-liter V8 features twin-turbocharging, kind of like other hot Cadillac models. There’s something else that makes this new V8 engine similar to other boosted mills in the Cadillac line up, and this is going to scare some mega fans out there, so we hope you’re sitting down.

Codenamed GF18, this new V8 engine features 4-valve-per-cylinder heads and a dual-overhead cam design. It also has the heads flipped around to form a “Hot V” configuration. This idea puts the intake valves on the outside of the heads and the exhaust valves on the “inside” of the V. This allows the turbo manifolds and turbochargers to be placed within the cylinder heads. This design allows for superior exhaust scavenging, improving turbo lag and engine response. With “up to 20 pounds of boost (1.38 bar)” available, this engine produces 550 horsepower at 5,700 RPM and 627 lb-ft of torque at 3,200 RPM in the new Cadillac CT6 V-Sport. In the standard CT6, the same engine will produce 500 horsepower and 553 lb-ft of twist.



“But that engine cover says ‘Cadillac’ on it, not Corvette.”
That is true, for now. However, news that the upcoming mid-engine C8 Zora will use a turbocharged, reduced-displacement mill have been making the rounds since the first leaks were publicized. Initially, most of us had it pegged that a 5.5-liter DOHC variant of this engine would be specced for Corvette duty. However, Cadillac announcing the 4.2-liter GF18 today does confirm our previous information. The fact that this new Cadillac engine will be built at General Motors’ Performance Build Center at the Chevrolet Corvette plant in Bowling Green, Kentucky makes it even easier to connect the dots to the Chevrolet halo car. It is entirely possible that the architecture for the GF18 engine was designed to be very modular, like the Small Block V8, so changes in displacement and power outputs could be accommodated. With a world class projected power level in excess of 800 horsepower, the bump in displacement makes sense. After all, the C8 Zora needs to out-do the 2019 ZR1.

Everything seems to be shaping up as we predicted. However, with an expected arrival date of 2020 for the mid-engine C8 Zora, we don’t expect to see the real deal unveiled until the end of this year, or, perhaps, at the 2019 Detroit Auto Show. That said, as always, we will keep you up to date on developments as they occur.

Want to sound off on thew new DOHC twin-turbo V8 and what this means for the mid-engine C8 Corvette Zora? Hop on over to the forums where the subject is blowing up as people sound off on it.


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Old 03-23-2018, 09:16 AM   #105
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That render is pretty ugly. Hopefully it looks better than that.
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Old 03-24-2018, 06:57 PM   #106
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That render is pretty ugly. Hopefully it looks better than that.
The passenger compartment doesn't look as forward as that spy shot.
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Old 03-30-2018, 07:59 AM   #107
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Default New Photos Show Mid-Engine Corvette C8 Up Close: Spy Shots











Feast your eyes on yet another set of spy shots of the upcoming mid-engine Corvette. Spotted undergoing testing in Colorado, the future Corvette, of which there were two, were accompanied by two future GM pickup trucks. All four models were heavily camouflaged.

GM Authority reader Bob, who took the shots, managed to get up close to the models. He said that the mid-engine Vettes “sound fantastic”, as you can verify from the most recent video of the sports car undergoing testing.


We’re patiently waiting the day to see and, more importantly, drive the mid-engine Corvette. The sports car is expected to launch in the 2019 calendar year as a 2020 model year vehicle and will likely be sold alongside the current, C7 Corvette line, for several years.
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Old 03-30-2018, 08:07 AM   #108
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Default Cadillac 4.2L Twin-Turbo V8 Not Bound For Corvette, Says Brand President Read more:

^^^^^also


Cadillac 4.2L Twin-Turbo V8 Not Bound For Corvette, Says Brand President

Cadillac President Johan de Nysschen explicitly told media here at the 2018 New York International Auto Show that the brand’s new 4.2-liter twin-turbo LTA V8 engine is not bound for any Corvette. The executive aimed to squash any rumors that have circulated since the engine’s reveal last week with the 2019 Cadillac CT6 V-Sport.




The engine produces 550 horsepower and 627 pound-feet of torque in the V-Sport, though a 500-hp version will be optional in other Cadillac models.

de Nysschen said the engine focuses more on refinement and luxury, while the Corvette “wants a different kind of character.”

The idea behind Cadillac’s 4.2-liter twin-turbo V8 heading to the mid-engine C8 Corvette really gained momentum after a leaked IHS Markit report described a seemingly identical engine in the pipeline for the C8 Corvette. The report also mentioned the current 6.2-liter LT1 V8 engine and a 5.5-liter twin-turbo V8 engine.


Cadillac also threw fuel on the fire when it disclosed its new V8 engine would be built in Bowling Green, Kentucky, and General Motors’ Performance Build Center—the home of all things Corvette.

Still, de Nysschen may simply have shut down rumors for this specific engine. Engineers could certainly have a relative engine based on the LTA architecture in the works. We’ll simply have to wait and see.
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Old 03-30-2018, 12:48 PM   #109
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Not going into a Corvette...



Soooooo a new XLR-V is coming?
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Old 03-30-2018, 04:28 PM   #110
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Perhaps the mid-engine "Corvette" won't be a "Corvette" after all?
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Old 03-30-2018, 04:31 PM   #111
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Perhaps the mid-engine "Corvette" won't be a "Corvette" after all?
Corvette for sure.

I can even see it becoming a sub brand.


But, I can see a Cadillac version ala the XLR as well. Corvette would be the sports version and the Cadillac would be a GT. So they get an F car fighter as well as an Aston fighter.
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Old 03-31-2018, 06:56 PM   #112
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Perhaps the mid-engine "Corvette" won't be a "Corvette" after all?
Difficult to say.

de Nysschen's statement can be taken at face value as true if the car goes by another name; the likely "Zora" moniker.

It could also be true that the Cadillac motor itself will not be used in the mid-engine Corvette, but another engine (likely much larger displacement, given the Caddy engines specs and the existence of the new ZR1) on the same architecture.

As Hondaslayer mentioned, Corvette could go on to be a brand/sub-brand; this has also been rumored for some time. I feel it's somewhat less likely than in the past given the recent failure of the SRT brand; though admittedly that brand did have it's own issues that would likely not be duplicated with a Corvette brand (namely trying to market and fracture formerly top trim models from the existing Chrysler brands as models under the new brand name, which was completely stupid).

I think it's likely de Nysschen's statement is true; that engine doesn't really have a place in the C7 lineup (outside of perhaps an unlikely Grand Sport revision), and would be too weak even as a base engine in the mid-engine car given again the existence of the front-engine C7 Z06 and upcoming front-engine C7 ZR1. All indications for the new model are for a mid-engine car that would simply slot above all the existing Corvette models; and will likely be built concurrently, not technically as a "C8" model.
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Old 05-31-2018, 12:47 AM   #113
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Default Mid-Engined Corvette Program Reportedly Inching Towards Public Confirmation

Report: mid-engine C8 Corvette to get flat-crank 600- and 800-hp V-8s, 1,000-hp AWD hybrid version, but no manual

https://www.motorauthority.com/news/...-but-no-manual



New details surrounding Chevrolet's worst-kept secret, the next-generation mid-engine Corvette, should be more than enough to perk up enthusiasts' ears.

The rather detailed information comes from a Car and Driver report, which pegs three engines for the sports car turned supercar. At launch, the C8 Corvette will receive an upgraded version of the current 6.2-liter LT1 V-8 found in the current Corvette Stingray. However, horsepower will allegedly increase from 460 to 500 to make up for some added weight.

Moving right along, we arrive at the juicier details. Chevrolet will reportedly stick a 5.5-liter DOHC flat-plane crank V-8 engine under the hood, and it will produce at least 600 hp. Expect a redline much higher than in past Corvettes. Soon thereafter, C/D reported, the same 5.5-liter V-8 engine will receive two turbos to send horsepower to about 800. We previously were treated to CAD images showing a twin-turbo V-8 engine for the mid-engine Corvette. Now, it seems quite likely we were staring at the 5.5-liter V-8 referenced in the latest report.

CAD images of the mid-engine Chevrolet Corvette - Image via Michael Accardi
Not enough? No problem for Chevrolet and General Motors engineers. Sitting atop the engine hierarchy will be a 1,000 hp all-wheel-drive hybrid setup, according to C/D. The basis of the powertrain will remain the 5.5-liter twin-turbo V-8 engine, but a 200-hp electric motor will power the front wheels, while the internal-combustion engine will send power to the rear. That's where the 1,000 hp figure comes into play.

Despite all of the spectacular engineering work, the report claims Chevrolet will keep the mid-engine Corvette an everyman's sports car with supercar levels of performance. Thus, the C8 Corvette will likely be largely made of aluminum with various components made from magnesium and carbon fiber. Fiberglass will make up most of the body panels and total weight should come in around 3,500 pounds.

That all sounds like great news, but it appears there is bad news for the #giveashift crowd. According to C&D's intelligence, no manual transmission is planned. Instead, a new Tremec 8-speed dual-clutch will be the only transmission.

Before wrapping up the load of enlightening details, C&D also noted that we will likely see more of the car in the spring of 2019.
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Old 05-31-2018, 11:48 AM   #114
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Chevrolet claims the mid engine corvette will still be the everymans sports car.. LOLOLOL


How do you write this with a straight face.

Last edited by Skylab; 05-31-2018 at 12:28 PM. Reason: "still be"...?
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Old 05-31-2018, 12:30 PM   #115
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Question

^
We live in an age where 400hp sedans are the norm, or at least, are expected.
The talk of a factory 1,000 horsepower Vette (even 800hp) is insanity.
No special license...just decent credit and some cash, and you're driving off the lot.

Ehh...I tend not to take rumors so seriously until the product hits the streets.
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Old 05-31-2018, 12:45 PM   #116
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Mid-Engine Corvette: I was the NSX forever development before the NSX was even a thing.
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Old 05-31-2018, 12:52 PM   #117
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Just read an article that the Average vehicle Horsepower in the US is 315 HP (as of 2017). 230 HP if you exclude trucks and SUVs.

That's the Average, think about that.


Last edited by mhoward1; 05-31-2018 at 12:57 PM.
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Old 05-31-2018, 02:27 PM   #118
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now graph horsepower/weight ratio across the years.
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Old 05-31-2018, 04:07 PM   #119
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now graph horsepower/weight ratio across the years.
Pretty much this.
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Old 05-31-2018, 05:32 PM   #120
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Old 05-31-2018, 06:03 PM   #121
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Report: mid-engine C8 Corvette to get flat-crank 600- and 800-hp V-8s, 1,000-hp AWD hybrid version, but no manual

https://www.motorauthority.com/news/...-but-no-manual



New details surrounding Chevrolet's worst-kept secret, the next-generation mid-engine Corvette, should be more than enough to perk up enthusiasts' ears.

The rather detailed information comes from a Car and Driver report, which pegs three engines for the sports car turned supercar. At launch, the C8 Corvette will receive an upgraded version of the current 6.2-liter LT1 V-8 found in the current Corvette Stingray. However, horsepower will allegedly increase from 460 to 500 to make up for some added weight.

Moving right along, we arrive at the juicier details. Chevrolet will reportedly stick a 5.5-liter DOHC flat-plane crank V-8 engine under the hood, and it will produce at least 600 hp. Expect a redline much higher than in past Corvettes. Soon thereafter, C/D reported, the same 5.5-liter V-8 engine will receive two turbos to send horsepower to about 800. We previously were treated to CAD images showing a twin-turbo V-8 engine for the mid-engine Corvette. Now, it seems quite likely we were staring at the 5.5-liter V-8 referenced in the latest report.

CAD images of the mid-engine Chevrolet Corvette - Image via Michael Accardi
Not enough? No problem for Chevrolet and General Motors engineers. Sitting atop the engine hierarchy will be a 1,000 hp all-wheel-drive hybrid setup, according to C/D. The basis of the powertrain will remain the 5.5-liter twin-turbo V-8 engine, but a 200-hp electric motor will power the front wheels, while the internal-combustion engine will send power to the rear. That's where the 1,000 hp figure comes into play.

Despite all of the spectacular engineering work, the report claims Chevrolet will keep the mid-engine Corvette an everyman's sports car with supercar levels of performance. Thus, the C8 Corvette will likely be largely made of aluminum with various components made from magnesium and carbon fiber. Fiberglass will make up most of the body panels and total weight should come in around 3,500 pounds.

That all sounds like great news, but it appears there is bad news for the #giveashift crowd. According to C&D's intelligence, no manual transmission is planned. Instead, a new Tremec 8-speed dual-clutch will be the only transmission.

Before wrapping up the load of enlightening details, C&D also noted that we will likely see more of the car in the spring of 2019.
Wow, impressive. Now, let's just hope that it looks good inside and out. I have always been pretty underwhelmed with Corvettes in the looks department.
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Old 05-31-2018, 07:59 PM   #122
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Wow, impressive. Now, let's just hope that it looks good inside and out. I have always been pretty underwhelmed with Corvettes in the looks department.
Exterior and interior design has always been ok (except dat ass) It's been the material quality that is lacking, in addition to important touch items being or seeming parts binned.
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Old 05-31-2018, 08:43 PM   #123
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Exterior and interior design has always been ok (except dat ass) It's been the material quality that is lacking, in addition to important touch items being or seeming parts binned.
I agree, the C7 is not bad, except for the rear. I’ve never liked any of the interior designs myself though. Material quality certainly has lacked too and probably contributes to that impression.

I wouldn’t mind paying a little more for better quality on one of the upper tier models as long as it looked good, and distinctive from the lower tier models, and was still significantly less than a super car.

Perhaps the supposed 1000hp version will deliver...
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Old 05-31-2018, 08:55 PM   #124
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I say "ok" because while it's not ground breaking, it's (mostly) in offensive.

Not great, not bad, just whatever. It doesn't tickle the testes.
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Old 06-01-2018, 08:14 AM   #125
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Originally Posted by mhoward1 View Post
What does that index mean? also where are the numbers coming from? (fleet sales, consumer sales, or both) what do they include? (cars, trucks, HD trucks, etc.)

real world example (US):
1991 Toyota corolla sedan auto 102hp & 2390lb = 23.4lb/hp
2018 Toyota corolla sedan cvt 132hp & 2870lb = 21.7lb/hp

Engines have gotten more efficient, cars have gotten safer, horsepower has increased, but really just to keep up with increased curb weight when it relates to cars.
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