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  1. #1
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    May 2016
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    177

    Chevrolet C8 corvettes LT2v8. 2020.

    .
    Last edited by GTS2017; 15-10-2019 at 07:30 AM.
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  2. #2
    Join Date
    May 2016
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    177
    Chevrolet C8 Corvette's LT2 V8 examined: Geek Speak
    By Louis Cordony, 14 Oct 2019 Features


    Delving deep into the LT2, the new dry-sumped small-block powering Chevyís C8 Corvette
    COME 2020, Chevrolet will build the most significantly changed Corvette in history and place the engine behind the driver. Unlike its superseded front-engine layout, though, the atmo V8 engine at its core will walk a path of evolution rather than revolution.
    Dubbed the LT2 and powering the base Stingray variant, the new engine evolves from the LT1 small-block V8 that debuted in the C7 Stingray and currently powers the Camaro 2SS. So that means its 103.3mm bore and 92.0mm stroke remain, its 6162cc capacity carries over, the compression ratio is still 11.5:1 and its valves span the same 54mm diameter on the intake side and 40.4mm for the exhausts. Even the throttle body stays 87mm.

    But thanks to redesigned intake and exhaust packages (it is, after all, placed at the other end of the car), dry-sump oil lubrication and an upgraded camshaft, it will unleash 369kW at 6450rpm and 637Nm at 5150rpm when equipped with the optional exhaust as part of a Z51 package. Thatís 34kW and 27Nm more than the original C7 Corvette, while delivering those respective peaks 750rpm and 550rpm later.

    For reference against other great atmo short-blocks, itís only 6kW and 3Nm shy of the fearsome 7.0-litre LS7 that lurked within the 2006 C6 Corvette Z06 and HSV W427. Yet the new LT2-equipped C8 almost matches it with 846cc less.
    Chevrolet will not offer the car with a manual transmission; the LT2 will be mated to an eight-speed dual-clutch transaxle, another first for a road-going Corvette. We hope GM changes its stance in the near future.

    So, where does the LT2 sit in the family? It belongs to GMís fifth small-block generation, joining the current LT1, supercharged LT4 (which powers the current Camaro ZL1 and Corvette Z06) and supercharged LT5 (used in the Corvette ZR1). That means it also packs variable cam timing, direct injection and an upgraded rotating assembly design. It also comes with cylinder deactivation, a necessary evil to help it pass emissions.
    It still has the 4.4-inch bore centre spacing and pushrod concept as the original Chevrolet small-block V8 from 1956. But before you call it outdated, last yearís Belle Isle IndyCar Grand Prix illustrated that the last thing the brand needs to reinvent is the small-blockís fundamental engine design.
    That was when GM president Mark Reuss, who happens to be skilled behind the wheel, drove the pace car Ė a then-new Corvette ZR1 Ė straight into a wall during a caution period. With 563kW and 968Nm, the ZR1 made considerably more power than the race cars it was entrusted to slow down.

    01 - SUCK AND BLOW
    Engineers reversed the intake plenum so the throttle body lies at the tail end of the Corvette between the exhaust collectors. Those collectors now complete a four-one manifold exhaust runner design, as opposed to the C7ís four-two-one manifold.
    02 - TESTA ROSSA
    New ancillary placement was also necessary to improve engine appearance. For instance, the side-mounted coil packs better show off the red-painted valve covers, and the exhaust manifold is now stainless steel, rather than cast.
    03 - OIL TANKER
    Chevrolet says the C8ís dry-sump system was a must to combat its higher cornering loads. Three scavenge pumps save 7.09 litres of 0W40 (stored in this black tank) from pooling in a sump, also allowing the LT2 to sit 25mm lower in the car.
    04 - SPIN CLASS
    An upgraded camshaft increases exhaust valve lift, but leaves the phasing of exhaust and intake timing relatively untouched. The valvetrain is also carryover, meaning the LT2 will rev to 6600rpm.
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  3. #3
    Join Date
    Apr 2011
    Location
    Perth
    Posts
    1,769
    Good read thanks interesting times ahead and now.

  4. #4
    Join Date
    May 2016
    Posts
    177
    Last edited by GTS2017; 20-10-2019 at 06:31 PM.
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  5. #5
    Join Date
    Mar 2008
    Posts
    2,701
    No doubt a "milestone" vehicle for GM, Corvette enthusiasts, and foremost, as as far as we are concerned, the Aussie market.
    BUT, the two BIG questions for me are, when will WE get it, and, HOW MUCH will its "driveaway" cost be to potential wishful, committed, enthusiastic Aussie owners?
    IMHO, there are some very unrealistic expectations out there.
    Pickles.

  6. #6
    Join Date
    Jan 2004
    Location
    Perth, WA
    Posts
    7,878
    Good review/comparison to the 911 here...

    https://www.motortrend.com/cars/chev...on-test-review

    Sounds like an absolute cracker.
    By comparison, the 911 Carrera S is what, 250k before on roads? The Vette should be half the price but even if it cost 200k drive away, it's still excellent value. I believe a lot of people hear "$60k in the US" and then think it will be an unrealistic, sub 100k price here.

  7. #7
    Quote Originally Posted by white_lie View Post
    Good review/comparison to the 911 here...

    https://www.motortrend.com/cars/chev...on-test-review

    Sounds like an absolute cracker.
    By comparison, the 911 Carrera S is what, 250k before on roads? The Vette should be half the price but even if it cost 200k drive away, it's still excellent value. I believe a lot of people hear "$60k in the US" and then think it will be an unrealistic, sub 100k price here.
    Yeah i'm guessing thinking 125k- 150k that would be with a few options as i don't think Holden will be bringing all variants out.

  8. #8
    Join Date
    May 2016
    Posts
    177
    How Much Power Does the 2020 Chevrolet Corvette Really Make? We Take it to the Dyno and Find Out


    We're in shock. A quick math check reveals that's an estimated 656 hp and 606 lb-ft of torque at the crank if we assume a 15-percent drivetrain loss—way over the 495 hp and 470 lb-ft that Chevy claims.

    https://www.motortrend.com/news/2020...qrz5ve9nU9x4YQ
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