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Old 12-13-2017, 02:35 PM   #1
mhoward1
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Default Possible leaked document spells out C8 Corvette Engine Lineup

https://www.corvetteforum.com/articl...mpaign=content



Quote:
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.

Mid-Engine Cadillac Rendering

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.



ALSO SEE: What the Forum Has to Say About This



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.
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Last edited by mhoward1; 12-13-2017 at 04:42 PM.
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Old 12-13-2017, 09:35 PM   #2
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GM should shock the competition and go Hybrid drivetrain, e.g. McLaren P1 or Porsche 918. Use parts from the Volt/Bolt.
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Old 12-14-2017, 08:22 AM   #3
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I just hope it looks better than that rendering.
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Old 12-14-2017, 08:24 AM   #4
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Quote:
Originally Posted by Scooby-Doode View Post
GM should shock the competition and go Hybrid drivetrain, e.g. McLaren P1 or Porsche 918. Use parts from the Volt/Bolt.
They'll probably try to hold off on this as long as possible, or only offer it as a low volume model. Think about your stereotypical Corvette buyer: aging baby boomer. Most of them don't want that, they want a naturally aspirated V8 with a planetary automatic transmission. Notice I said buyer, as in the person who buys it new with a warranty, not the "owner" who could be a guy on the internet who gets it when it's depreciated 4 years later.
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Old 12-14-2017, 09:42 AM   #5
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More interested in what Cadillac is coming up with. Not that they need another niche car that won't sell.
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Old 12-06-2018, 08:17 AM   #6
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Default Insider’ Claims To Have Details On C8 Corvette

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Insider’ Claims To Have Details On C8 Corvette

Prepare a large grain of salt for this next story. A user by the name of “unlimtedPower” has taken to the Corvette Forum and claims he has insider, first-hand knowledge about the forthcoming mid-engine C8 Corvette.

He refers to this car as the C8 Corvette Manta Ray, a name we’ve also seen in the past via trademark filings. And the user begins their post with a humble disclaimer that he or she cannot share any more information and “if you don’t believe me then that’s fine.”

According to this information, the base C8 Corvette will be called the Corvette Manta Ray and feature an updated LT1 V8 engine that makes 520 horsepower. A dual-clutch transmission will be the only transmission offered, something previous rumors have also floated in the past. We’ve also heard the mid-engine C8 Corvette on video numerous times, and the shift points all sound like they com from an ultra-quick automatic gearbox.

In 2021, the C8 Corvette lineup will expand to include a Corvette Grand Tour and Corvette Grand Sport, per the poster. Allegedly, the Corvette team will do away with the Z06 name in favor of “Grand Sport.” We find that incredibly hard to believe, so have that grain of salt ready.

The “Grand Tour” model will allegedly feature a version of Cadillac’s Blackwing V8 engine with the turbos moved to the sides of the engine and put an emphasis on quiet cruising and luxury. The user said the GT version will have Cadillac’s fingerprints all over as a Cadillac team supposedly helped develop this particular model.

The “Grand Sport” will be the Z06 equivalent, per the anonymous poster, and feature the long-rumored 5.5-liter V8 engine.

Finally, the Corvette won’t be found solely at Chevrolet dealerships anymore, according to this “insider.” Instead, any GM dealer will be able to apply to sell the C8 Corvette, but the application process is reportedly stringent and very strict. Certified Corvette technicians will also be the only techs permitted to work on the mid-engine Corvette.

Some of this we can certainly believe, but we’re unable to corroborate the story laid out here. Our sources say not much of this is true, but Manta Ray is absolutely on the table for some variant of C8 Corvette.
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Old 12-06-2018, 09:19 AM   #7
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Mmmm.. V8TT
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Old 12-06-2018, 12:34 PM   #8
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Yeah but what about the tail lights? That is the real question...
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Old 12-06-2018, 12:35 PM   #9
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Oh and if the C8 is automatic only I am going to buy another C7 manual and store it, because the price of manual C7's will go up Especially Z06.
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Old 12-06-2018, 01:10 PM   #10
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My fear is the C8 will turn into the GTR. Lots of tech and performance but the price point is going to be too high. Part of the appeal of the Corvette has been its bang for the buck but at an obtainable price. Even in base trim, it's still a sports car.
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Old 12-06-2018, 01:34 PM   #11
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Quote:
Originally Posted by subyski View Post
My fear is the C8 will turn into the GTR. Lots of tech and performance but the price point is going to be too high. Part of the appeal of the Corvette has been its bang for the buck but at an obtainable price. Even in base trim, it's still a sports car.
Probably one of the reasons why GM is going to keep making the C7 along side the C8
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Old 12-06-2018, 05:58 PM   #12
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Originally Posted by Sid03SVT View Post
Probably one of the reasons why GM is going to keep making the C7 along side the C8
So many rumors, I think we need to see how all this plays out. If the C8 is just going to be marketed and priced as as Supercar then it all makes more sense and then in the next year or two GM rolls out a C8.5 that is more budget friendly? Makes sense I guess. If the goal is for it to truly be a C7 replacement then it seems the affordable Corvette as we know it could be dead. It will alienate tons of Corvette buyers and Ford could convert lots of Corvette owners to Mustang owners (GT350/500).
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Old 12-06-2018, 06:21 PM   #13
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Quote:
Originally Posted by thill View Post
So many rumors, I think we need to see how all this plays out. If the C8 is just going to be marketed and priced as as Supercar then it all makes more sense and then in the next year or two GM rolls out a C8.5 that is more budget friendly? Makes sense I guess. If the goal is for it to truly be a C7 replacement then it seems the affordable Corvette as we know it could be dead. It will alienate tons of Corvette buyers and Ford could convert lots of Corvette owners to Mustang owners (GT350/500).
I think the Camaro will be used to fill in that gap, and it can if they improve visibility and update the styling.
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Old 12-07-2018, 08:53 AM   #14
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New video showing the C8.R testing at Sebring.

I haven’t been a big fan of the C8 test mules I’ve seen, but this C8.R looks and sounds sexy.


Last edited by VaporTrail308; 12-07-2018 at 12:44 PM.
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Old 12-07-2018, 09:24 AM   #15
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Smaller displacement V8TT? So it'll guzzle gas a little more slowly but still have that growl and grunt?

I'm interested as long as they don't blow up the price to R35 levels.
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Old 12-07-2018, 09:44 AM   #16
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Originally Posted by SirBrass View Post
Smaller displacement V8TT? So it'll guzzle gas a little more slowly but still have that growl and grunt?

I'm interested as long as they don't blow up the price to R35 levels.
I think the C7.R was already a reduced displacement version of the street motor. I think it was down under 5 liters and still had a restrictor on the intake. I wouldn't be surprised if this is still a naturally aspirated engine. Fewer parts to fail. Definitely a flat plane crank though. I hate that sound. If that's what the production versions are getting as the only option then I don't see myself trading in the Cayman on a Corvette .
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Old 12-12-2018, 11:35 AM   #17
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Mid-engine Corvette reportedly not debuting at 2019 Detroit auto show

https://www.motorauthority.com/news/...roit-auto-show
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Old 12-12-2018, 12:23 PM   #18
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Originally Posted by Skylab View Post
Mid-engine Corvette reportedly not debuting at 2019 Detroit auto show

https://www.motorauthority.com/news/...roit-auto-show
Maybe NY since it was 1st introduced there?

And isn't Corvette moving to a brand upon themselves, like RAM/Jeep?

--kC
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