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Here is your C8 engine...according to GM Authority

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Here is your C8 engine...according to GM Authority

 
Old 07-05-2019, 01:51 PM
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Steven Bell
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Default Here is your C8 engine...according to GM Authority

http://gmauthority.com/blog/2019/07/...ine-exclusive/




Mid-Engine Corvette C8 To Be Powered By 6.2L LT2 V8 Engine: Exclusive

8

The debut of the mid-engine Corvette C8 is rapidly approaching, and while we expect the complete details when the fresh Vette drops on July 18th, we do have the inside scoop on the C8’s engine a few days prior to the car’s reveal. According to sources familiar with future Chevrolet product plans, the new mid-engine C8 Corvette will be powered by GM’s upcoming 6.2L V8 engine assigned RPO Code LT2.

The 6.2L LT2 V8 is nearly identical to the 6.2L LT1 V8, which can be found in the current Corvette C7 Stingray and Grand Sport, as well as the Chevrolet Camaro SS and new Camaro LT1. However, the LT2 receives a few minor modifications that enable fitment in the mid-engine configuration of the Corvette C8. What’s more, the LT2 may also feature a few other improvements compared to the LT1.

GM Authority has heard of but has not been able to corroborate with full degree of certainty updates to the Active Fuel Management system (enabled in the Eco driving mode) and valving improvements that diminish friction, delivering smoother and more efficient operation.


Other than that, the LT2 will have the same displacement of 6.2 liters (376 ci) as the LT1, along with the same OverHead Valve (OHV), or push-rod configuration. Supporting technologies will include Direct Injection, Variable Valve Timing and Active Fuel Management.

Mounted in the mid-engine Corvette C8, the LT2 is expected to offer slightly higher output figures than offered by the LT1 in the C7, to the tune of 480 to 500 horsepower. For reference, the LT1 in the base-model C7 Corvette Stingray offers 376 cubic inches of displacement, with output rated at 455 horsepower at 6,000 rpm and 460 pound-feet of torque at 4,600 rpm. On the Z51 package and the Grand Sport, both of which come equipped with the NPP high-performance exhaust system, power rises slightly to 460 horsepower at 6,000 rpm and 465 pound-feet of torque at 4,600 rpm.

6.2L LT1 V8 Engine SpecsCorvette C7 Stingray BaseStingray C7 with Z51 PackageC7 Grand SportExpected C8

Displacement (liters / cubic-inches)6.2 / 3766.2 / 3766.2 / 3766.2 / 376

Power (hp / kW @ rpm)455 / 339.3 @ 6000460 / 621 @ 4600460 / 621 @ 4600480-500

Torque (lb-ft / Nm @ rpm)460 / 343 @ 6000465 / 627.8 @ 4600465 / 627.8 @ 4600480


The LT2 in the mid-engine Corvette C8 will be mated to a seven-speed dual-clutch transmission. A grand total of zero sources have so far told GM Authority that a manual transmission option will be available.


The fact that Chevrolet will continue using the fifth-generation Small Block engine architecture for the mid-engine Corvette C8 shouldn’t come as a terrible surprise given how capable the engines are. The family was introduced by the aforementioned LT1 for car applications as well as the 4.3L LV3 V6, 5.3L L83 V8 and 6.2L L86 V8 for pickup trucks.


Last edited by Steven Bell; 07-05-2019 at 01:54 PM.
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07-05-2019, 04:01 PM
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Originally Posted by ojm View Post
Old technology tweaked?
The is absolutely nothing "old-tech" about the LS OHV engines.

They have the highest NA specific output per unit of engine weight of ANY automotive engine out there, and yes that includes Ferrari and Porsche engines.

They have the highest fuel economy of any engine in their power class

They have the smallest physical packaging of any engine in their power class.

Fewer moving parts makes them more reliable.

These are all critical attributes from an auto engineering and design perspective. Lighter. more powerful, and more compact. Which is why the Corvettes are typically the fastest around a road course. More moving parts and more valves and camshafts is not more advanced. It is less advanced.
Old 07-05-2019, 01:57 PM
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Expected, if accurate.
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Old 07-05-2019, 02:03 PM
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This is very reassuring for me,there was a lot of turbo talk the last couple of week.
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Old 07-05-2019, 02:09 PM
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Old technology tweaked?
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Old 07-05-2019, 02:11 PM
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The interesting thing is that there is no new information in their article and some of their information is speculation on their part (i.e. 480-500 HP). I thought they'd at least have a photo.
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Old 07-05-2019, 02:12 PM
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Originally Posted by ojm View Post
Old technology tweaked?
Depends how you see it...old technology prooven.

Iím a glass half full type of guy.
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Old 07-05-2019, 02:25 PM
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So they wrote an article that just regurgitates speculation that has been all over the place for the last year. Oh yeah with zero proof to back any of it up. Now THAT is journalism.
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Old 07-05-2019, 02:26 PM
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Originally Posted by pietro c7 View Post
Depends how you see it...old technology prooven.

Iím a glass half full type of guy.

In that case the last C7 may be a good choice, but it's GM a safety recall is in the package, at this very moment their are 100 of thousands of GM cars with loose welding joints on the lower control arms on the highways.
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Old 07-05-2019, 02:36 PM
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This is good news
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Old 07-05-2019, 02:41 PM
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Originally Posted by ojm View Post
Old technology tweaked?
Seem to recall another manufacturer thatís been pushing flat 6s for over half a decade...seems to work just fine.
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Old 07-05-2019, 02:45 PM
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Gonna be a lot of fun pressing down on the clutch and down shifting when giving the LT2 some gas.... oh darn just realized no manual trans, DRAT!
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Old 07-05-2019, 02:51 PM
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This line from that article, at least to me, implies that AFM is only active in ECO mode.

"GM Authority has heard of but has not been able to corroborate with full degree of certainty updates to the Active Fuel Management system (enabled in the Eco driving mode) and valving improvements that diminish friction, delivering smoother and more efficient operation."
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Old 07-05-2019, 02:57 PM
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Originally Posted by ojm View Post
In that case the last C7 may be a good choice, but it's GM a safety recall is in the package, at this very moment their are 100 of thousands of GM cars with loose welding joints on the lower control arms on the highways.
Not many car guys are gonna tell you the C7 is a bad choice.
Its excellent .
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Old 07-05-2019, 02:59 PM
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Originally Posted by ojm View Post
Old technology tweaked?
Think about it, Other than the C5, name the generation change that was a true 100% change from the last year of the previous generation.
C1 to C2, hold over the 327 engine the base 250HP and 300 HP were identical
C2-C3, entire drive train was a hold over from C2. (the 350 did not appear until 1969)
C3-C4, the last C3 350, crossfire injection, was identical to the first C4 350.
C4-C5, complete change
C5-C6, The LS2 was simply a larger displacement LS1.
C6-C7, The LT-1 was a modified LS3.
C7-C8, For the first year, it will be a slightly modified LT1, actually very minor changes.
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Old 07-05-2019, 03:25 PM
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Originally Posted by roadbike56 View Post
Think about it, Other than the C5, name the generation change that was a true 100% change from the last year of the previous generation.
C1 to C2, hold over the 327 engine the base 250HP and 300 HP were identical
C2-C3, entire drive train was a hold over from C2. (the 350 did not appear until 1969)
C3-C4, the last C3 350, crossfire injection, was identical to the first C4 350.
C4-C5, complete change
C5-C6, The LS2 was simply a larger displacement LS1.
C6-C7, The LT-1 was a modified LS3.
C7-C8, For the first year, it will be a slightly modified LT1, actually very minor changes.
Standard GM Marketing playbook. Platform change but not the motor. C5 was diffferent in that way. C4 was different in the drivetrain and chassis but not the power plant.
So we have a completely different chassis/drivetrain config, but a warmed over powertrain. Doesnít sound like 2 in block cams are in the cards either.
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Old 07-05-2019, 03:29 PM
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Originally Posted by pietro c7 View Post
This is very reassuring for me,there was a lot of turbo talk the last couple of week.
The turbo engines are for the higher hp variants. I don't think anyone assumed the base C8 would be turbocharged.
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Old 07-05-2019, 03:50 PM
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Originally Posted by TXshaggy View Post
Seem to recall another manufacturer thatís been pushing flat 6s for over half a decade...seems to work just fine.
Came here to say this, except over 50 years, not half a decade is what I think you meant.
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Old 07-05-2019, 03:50 PM
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Originally Posted by roadbike56 View Post
C6-C7, The LT-1 was a modified LS3..
I dunno, going from port injection to direct injection is a pretty radical design change. Not an expert on LS3s, did the final versions have cam phasers?

Now, LT-1 to LT-2? Agreed.

Have a good one,
Mike
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Old 07-05-2019, 03:53 PM
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Chevrolet can't put all of their cards on the table in the 1st year, can they?
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Old 07-05-2019, 04:01 PM
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Originally Posted by ojm View Post
Old technology tweaked?
The is absolutely nothing "old-tech" about the LS OHV engines.

They have the highest NA specific output per unit of engine weight of ANY automotive engine out there, and yes that includes Ferrari and Porsche engines.

They have the highest fuel economy of any engine in their power class

They have the smallest physical packaging of any engine in their power class.

Fewer moving parts makes them more reliable.

These are all critical attributes from an auto engineering and design perspective. Lighter. more powerful, and more compact. Which is why the Corvettes are typically the fastest around a road course. More moving parts and more valves and camshafts is not more advanced. It is less advanced.
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