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ZORA Patrons Now Have Signature Picture Capability

Announcing an additional way for MECF to say thank you to our “ZORA Patrons.” Program now operational. Please see how: https://www.midenginecorvetteforum.c...r-zora-patrons
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2023 Corvette Info Including E-Ray, SR & Z06 Pricing, SR & Z06 Visualizers, 70th Anniversary Info, Press Releases for SR & Z06 & Their Build & Price, Order Guides & Visualizers

2023 Corvette Brochure:
E-Ray Visualizer:
Official E-Ray Press Release: https://www.midenginecorvetteforum.c...-press-release
Official GM E-Ray Pictures: https://www.midenginecorvetteforum.c...and-visualizer
+ 25 KEY E-Ray Components/Factors:
E-Ray Leaked Info/Visualizer: https://www.midenginecorvetteforum.c...tte-e-ray-leak
Z51 & Z06 GM Track Specs: https://www.midenginecorvetteforum.c...ecommendations
Z06 Order Guide:
Z06 MSRP and Options Pricing: https://www.midenginecorvetteforum.c...freight-charge
2023 SR Build & Price: https://www.midenginecorvetteforum.c...up-and-running
*2023 SR & Z06 Official Owners Manual:; and,
* 2023 GM Bash Major Seminar with HQ video: https://www.midenginecorvetteforum.c...ore-bash-video
*2023 Stingray Visualizer:
*2023 Stingray (ONLY Order Guide:
*70th Anniversary Combined Press Release For SR & Z06: https://www.midenginecorvetteforum.c...iversary-model
*Z06 Press Release: https://www.midenginecorvetteforum.c...-press-release
*Z06 Reveal Pictures: https://www.midenginecorvetteforum.c...eveal-pictures
*Z06 Visualizer:
Order Guide (unofficial): https://www.midenginecorvetteforum.c...-action-center
*Z06 vs Z07 Aero Components: https://www.midenginecorvetteforum.c...s-similarities
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C8 Z06 Engine Info

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  • C8 Z06 Engine Info

    Thanks to GM Authority.

    How much of this is new info to you?

    [Quote=gmauthority] Twin-Turbo V8 LT7 Engine For C8 Corvette Z06 LeakedLast week, GM Authority reported that the base model of the upcoming mid-engine Corvette C8, set to be called Stingray, will be powered by the 6.2-liter LT2 engine that will make around 500 horsepower. And now, less than a week before its unveiling, GM Authority has obtained new information about an upcoming GM twin-turbo engine, dubbed LT7, that is earmarked for a future, high-performance variant of the Corvette C8, potentially the C8 CorvetteZ06.

    GM LT7 Twin Turbo V8 Engine CAD Image Leak - Mid-Engine Corvette C8 Z06 001

    You may have seen these CAD images of the LT7 engine before, but there’s now some info to go along with the photos. So, GM will switch from blowers (superchargers) to snails (turbochargers) in its range-topping Corvette models. But don’t let the LT7 moniker mislead you: the engine portrayed in these GM CAD images is not based on GM’s fifth-generation Small Block / push-rod LT engine family, which includes the familiar LT1 (for the C7 Stingray), LT4 (for the C7 Z06), and LT5 (for the C7 ZR1). Instead, the LT7 is based on GM’s new Dual Overhead Cam (DOHC) V8 engine architecture initially introduced by the 4.2L Twin-Turbo V8 LTA, otherwise known as Blackwing.

    Don’t expect to see or even hear about this new Twin Turbo LT7 V8 engine during the Corvette C8 reveal next week, since that event will be dedicated to the base model mid-engine Corvette, aka the C8 Corvette Stingray. Instead, this here LT7 will go into what we expect to be the C8 Corvette Z06, which is at least another 16 months out, if not more.
    GM LT7 Twin Turbo V8 Engine CAD Image Leak - Mid-Engine Corvette C8 Z06 002
    A CAD image of the twin-turbo LT7 V8 for the C8 Corvette Z06

    Current information about the LT7 is sparse, but we have uncovered that it will have a larger displacement than the 4.2-liter Blackwing LTA. Sources tell us that the LT7 will make more than the 650 horsepower generated by the supercharged 6.2L LT4 V8 in the C7 Z06, and well more than the high-output version of the Blackwing LTA, which is rated at 550 horses and 627 pound-feet of torque. It’s currently unclear whether the LT7 will share the same block as the LTA, or if the two engines will only share the same overall engine design/configuration, and not size.

    The CAD images also show that the turbochargers are not mounted in the ‘Hot V’ design of the Blackwing. Instead, they are placed on either side of the Vee, below the cylinder banks. As such, the twin throttle bodies, intake manifold, and entire induction system differ from those of the Blackwing. We’d imagine that the head design varies as well.

    Cadillac 4.2L Twin Turbo V8 DOHC LTA Blackwing Engine

    Another point of interest is the cooling setup. Since this powertrain is for a mid-engine car, it doesn’t have a conventional front-mounted intercooler. On top of that, the DOHC Blackwing architecture utilizes water-to-air charge cooling, making the overall packaging of the cooling system very different from anything else GM has shipped in the past. Then again, a mid-engine sports car is already entirely different than anything in GM’s current portfolio.

    It’s worth noting that, when GM introduced the Blackwing V8 for the Cadillac CT6-V, originally called the CT6 V-Sport, the automaker made it a point in saying that the engine would be exclusive to Cadillac, through and through. But something seemed off; it didn’t make sense that today’s General Motors, an organization laser-focused on pinching pennies and optimizing its business in any way it can, would dedicate the colossal amounts of human, financial, and production resources to bring to market an engine on an entirely new engine architecture just to use it exclusively in a low volume product offering like the CT6-V, especially when that model might not even stick around in the near future.

    As such, it would make sense that the engine architecture behind the Blackwing V8 – as opposed to the engine itself – would be utilized across other high-end, high-performance vehicles within the GM portfolio. A higher-output variant of the Blackwing for a future C8 Corvette Z06, in the form of the LT7, fits that bill perfectly.

    2020 Chevrolet Corvette C8 Mid Engine - New York Drive 002 - Overhead Image

    It’s also worth noting that the 4.2L Twin-Turbo V8 Blackwing LTA is hand-assembled at the GM Bowling Green plant in Kentucky – the one and only home to the Corvette. Hence, the assembly line is almost begging for the addition of a more potent variant of the Blackwing V8 for a future, higher-output version of the C8 Corvette. Whether that model will be called Z06, or something else, is a story for another time.

    Subscribe to GM Authority for more mid-engine Corvette news, Corvette C8 news, Corvette news, Chevrolet news, and around-the-clock GM news coverage.
    2023 Z06: Hypersonic Gray HTC, two tone blue interior, CCB’s, 3LZ, E60, and with every visible carbon fiber option order-able including wheels. Lifetime, annual contributors, and 25 year members of National Corvette Museum. Home is the beautiful Pacific Northwest.

  • #2
    I don't think there are any new "leaks" in that article. It's just a compilation of info from old articles and rumors.


    • #3
      The Z06 will be 2022/3 ?

      Whether there will be both an NA DOHC and an TT DOHC. Or just one or the other.

      Whether there will be both a TT 4.2 Liter DOHC and a TT 5.5 liter DOHC. Or just one or the other.

      Whether the DOHCs will be flat plane crank-shaft or cross plane crank.

      Whether and what the hp and tq level spacings and distinctions as addressed above.

      There's going to be plenty to figure out after 07.18.19, not excluding what these things will look like with all the unique aero.



      • #4
        Yes the same info as rumored before. The advanced motors will be introduced as in previous Generations. As sales start to decline, to spark the interest more powerful power plants will be introduced.


        • #5
          At the rate the leeks are coming, the bucket of new info may not hold much on Thursday.
          2022 HTC 2LT Z51
          Front lift, mag ride
          black exterior, adrenaline red interior, bright red calipers


          • #6
            Not to worry. There will be so many facts and figures to get our heads spinning (just look at the C7 press release) — and way more was leaked about it by far including its motor, actual pictures, etc.
            2023 Z06: Hypersonic Gray HTC, two tone blue interior, CCB’s, 3LZ, E60, and with every visible carbon fiber option order-able including wheels. Lifetime, annual contributors, and 25 year members of National Corvette Museum. Home is the beautiful Pacific Northwest.


            • #7
              If the lt7 is larger than 4.2 liters i believe this motor will have a cross plane crank..

              fords folly woth its larger dohc v8 in the gt350 is a tough vibration quelling design...

              its too big a motor for the flat plane crank...

              gm really doesnt need more than 4 liters with twin turbos to produce 700 hp easy..

              ferrari does it in 3.9 liters with a flat plane crank...

              i propse the corvette c8 could in fact have a slightly smaller cubic inch displacement than the blackwing which sits at 4.2 liters if in fact gm wants the supposedly desirable flat plane crank....

              with turbo boost there is no need for a v8 larger than 4 liters these days...