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Thread: Chevrolet Is Benchmarking the Mid-Engined C8 Corvette Against the 911 Turbo S

  1. #1
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    Chevrolet Is Benchmarking the Mid-Engined C8 Corvette Against the 911 Turbo S

    The mid-engine Corvette is real. Yes, it's been rumored for literally decades and nothing has come of it, but this time, it's happening. We've seen a ute-based powertrain mule, we've seen them cold weather testing, and we've heard all sorts of info and rumors on what will be powering it.

    We also now know what car the mid-engined Corvette is designed to compete directly with: the Porsche 911 Turbo S.

    These mid-engined Corvette prototypes (there were three of them) were caught traveling through southwest Michigan with a Porsche 911 Turbo S in tow. And it's not just a guy in a Turbo S who wanted to follow some cool Corvettes around. This 911 has Michigan manufacturer plates on it, meaning that it is owned by a car manufacturer, not an individual. We're willing to bet a pretty penny that manufacturer is Chevrolet, especially considering Chevrolet has purchased 911s in the past for Corvette-related development work.

    It makes sense. The Corvette is always, always, compared with the Porsche 911. Both are the premier, halo sports cars from their respective nations, have been in production for approximately the same amount of time, and have similar performance across the range. While the C7 Corvette would be closer to a Carrera S and the Z06 and Grand Sport would be more akin to a 911 GT3, the mid-engine model will go in a slightly different direction.

    Benchmarking against a Turbo S implies that the Vette will be more than just a one trick pony. The Turbo S is a very nice all-around car; it's brutally quick on the track and effortlessly fast on the road. It's also $200,000, has 580-horsepower, and can hit 60 from a standstill in 2.5 seconds. Chevrolet seems to want its car to be just as capable as the Turbo S, and it will likely cost half as much.

    So what else can we tell from these photos and videos?

    These mid-engine Corvette prototypes spotted in Michigan are our best look yet at the upcoming American supercar. Even if the proportions have changed and the car is mid-engined, it is very obviously related to a Corvette. The nose comes to a sharp point, much like the C7, and the front end, though covered by camo, looks related to the current car. The rear end has quad, squared off exhausts, unlike the C7, these are pushed wide instead of centered. We can't tell what shape the rear lights are, but it's very unlikely that they're round.

    The brakes appear to be steel rotors, though it seems likely that carbon ceramics would also be offered on an upper trim level.

    While we don't know what's under the hood, we do believe that it could be a DOHC V8 codenamed LT5. It's an engine that could also appear, albeit in supercharged form, in the upcoming Corvette ZR1. The mid-engined Vette might not have forced induction, instead relying on less weight and better balance as the way it'd solidify its position as the halo Corvette.

    Of course, there could be an insane version on the way, this is the just the start of a car that's been nearly 50 years in the making.
    http://www.roadandtrack.com/new-cars...esting-photos/









  2. #2
    Member XAoPiLLz's Avatar
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    looks weird with the cab moved forward like that....ill have to see it in person once it hit the dealerships. starting to get that look of a Ferrari, Lambo, etc.

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    "that it could be a DOHC V8 codenamed LT5"
    OHV since that's the ZR-1 motor.

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    Three C8 Corvette Engines Revealed in Leaked Analyst Document

    Could the next-generation Corvette really make up to 850 horsepower?

    Hold onto your hats, folks. We have new Corvette information that could forever alter the brand you know and love. Thanks to Corvette Forum user “rsinor” leaking a market analyst document from IHS Markit, and some deep analysis and number-crunching by member “elegant“, we have near-definitive proof of the mid-engine Corvette and its three different engine options.

    Yes, the mid-engine Corvette is coming in the next few months, and it will feature three different V8 engine choices.

    Let’s skip all the BS and jump straight into the numbers. According to this engine production forecasting document, GM is starting production of two new DOHC V8s at the Tonawanda production facility. One will be a 4.2L, and the other will be a 5.5L. The current 6.2L V8 is also listed as an option.

    Breaking it down by model, the current Corvette is listed as two distinct variants: the Y1BC and the Y2BC. The Y1 is the current C7 Corvette, and it’s listed well into the future with 2021 as the last year of motor production. So it looks like the C7 will live at least another three years, but there is no word on a replacement front-engine platform in this document.

    Moving to the Y2, or the mid-engine car, it seems like there will be a big split between the three motors. IHS Markit has the 6.2L being the main choice for the car with an average of 14,000 yearly units from 2019 to 2021, with the production of that V8 dropping a bit after that. The 4.2L motor is next on the list with a projected yearly production volume averaging more than 7,000 units. Finally, the 5.5L carries the smallest production quantity with around 5,000 engines per year coming out of the Tonawanda plant.

    Now all we have listed is engine size, and nothing about designation. That means that all of the 6.2L engines in the Y1, or C7, platform car includes both standard Corvettes and the supercharged Z06 and ZR1 models. With DOHC engine production numbers being smaller than the 6.2L, it’s easy to assume that these cars will be “higher-tier” models with more power and more performance. In the production outlook, the 4.2L is called out specifically in a Cadillac-use case with twin-turbochargers. We expect both the 5.5L and 4.2L to be twin-turbo in the Corvette as well.

    What makes that Cadillac note curious is that “Cadillac Sports Car” is listed in the document, but there are apparently no production numbers for engine counts according to “rsinor’s” original thread. Despite having no engines listed in the year-by-year numbers, they still list an “average production per year” at 300 units. So perhaps this is actually a hint at plans for a Cadillac racing car that won’t see production.

    Finally, let’s take a look at horsepower. Short of exact numbers, “elegant” and “rsinor” list “maximum output” of the new engine family (across all displacements) as 850 hp and 720 lb-ft of torque. So it would make sense that the new 5.5L twin-turbo would be the 800+ hp model to move it above the ZR1 in power and performance. But, if you do some backwards math and cut that 5.5L into a horsepower-per-liter measurement, and then apply that to the smaller 4.2L, you get a max output of 650 hp. We don’t think it’s a coincidence that it lines up nicely with the Z06 Corvette.

    It would be a smart move for GM to position its new motors in a way that they can still compete with the performance output of the older cars. Who wants a new, and likely more expensive, Corvette that has less horsepower than the old one?

    This document and information leak has filled in a lot of blanks for us, but it has also left us with even more questions about the future of our favorite sports car. As always, you can keep it locked here on Corvette Forum to find out all the news on this upcoming model. Any time we get any information, we’ll be sure to let you know. Otherwise, feel free to hit the forums and give us your thoughts on all this. There is a lot of data here to parse through, and there are plenty of ways to interpret it, so feel free to open your mind and share your two-cents with all of us.
    https://www.corvetteforum.com/articl...ines-revealed/

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    Probably one of the best cars to benchmark it on.

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    Leaked CAD Images Reportedly Show Mid-Engine Corvette Components

    Are these the real deal or just an elaborate hoax?

    Everybody knows a mid-engine Corvette is coming, but the members over at CorvetteForum got something of a surprise late yesterday. A new user with the curious name ZERV posted up a few pictures of CAD designs, showing the engine and bones of, well, something car-related. Those who aren’t used to 3D renderings like this might have some trouble understanding what they’re looking at, but the folks at CorvetteForum seem pretty darned sure this is the mid-engine C8 Corvette – or rather, parts of it beneath the skin.

    Specifically, we’re getting a look at the front, the engine/transaxle, and the rear subframe on which the engine will sit. That is, if you think these images are legit, which CorvetteForum senior member firebirdfan adamantly believes. Among a list of observations the user gleams from the drawing are a very “beefy” transaxle, front suspension components that bear similarity to the last few Corvette generations, and an LT1 V8 engine.

    We can’t quite pick out the same details that firebirdfan cites to identify Corvette-related bits, especially with the small size and grainy nature of the photos. But the engine does bear a resemblance to the current 6.2-liter LT1 V8. And it's also clearly in a mid-engine configuration with the upturned headers and transaxle clearly visible. As for the rest, we can only yield to Corvette experts who might be able to identify specific components.

    Regardless of the details, the big question here is whether or not this is really the new mid-engine Corvette. The images themselves appear to be photographs of a computer screen – something we'd expect from a properly nervous leaker of info – and they conveniently show just enough detail to be interesting while stopping short of delivering a knockout punch. Then there’s the CorvetteForum user ZERV who originally posted the images. The name isn't a random choice – ZERV is believed to be GM’s codename for the mid-engine Corvette project, and the user is a new member with this post being the only one linked to the account. The original photos posted by ZERV were taken down, but not before another member uploaded them to imgur.

    Did someone at Chevrolet decide to seek some internet glory by leaking legitimate engineering shots of the new C8 Corvette? Was the leak planned as part of a viral marketing campaign to generate buzz ahead of a potential reveal? Or is simply someone having a bit of fun by pulling on the heartstrings of Corvette enthusiasts? From our perspective, there's good evidence to suggest these are legitimate. There's also some evidence to suggest it was an intentional leak, as the new C8 could well be unveiled in just a few weeks at the North American International Auto Show. This would be a great way to generate some viral buzz before showtime.

    In the end, only time will tell.
    https://www.motor1.com/news/224438/l...gine-corvette/






    Last edited by Supra26; 12-26-2017 at 01:08 PM.

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    GM Confirms That Leaked C8 Corvette CAD Images Are Real

    General Motors has inadvertently confirmed that recently-leaked CAD designs of the C8 Corvette are indeed genuine.

    Last week, the revealing images, detailing components including the vehicle’s engine and suspension systems, emerged online through the Corvette Forum. At the time, it was impossible to confirm whether or not the designs were directly from GM.

    However, the American automaker recently reached out to Jalopnik asking them to remove an article posted with the designs. Additionally, General Motors was able to have these designs removed from a Jalopnik Facebook post after sending a Digital Millennium Copyright Act request through to the social media network.

    Perhaps unknowingly, GM has admitted that the brand is the owner of the CAD designs.

    Try as General Motors might, the mid-engine Corvette is perhaps the worst kept secret in the auto industry. Spy shots of the car have been circulating for the better part of three years and throughout 2017, images have shown the Corvette’s development progressing at a steady rate.

    Sources claim that Chevrolet will offer the C8 Corvette with three different powertrains, including the LT2, LT6, and LT7, one of which will be a hybrid. Production of the supercar is expected to commence in January 2019.
    http://www.carscoops.com/2017/12/gm-...vette-cad.html


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