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Old 10-24-2012, 09:01 AM   #1
lemming
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GM's next generation small block v8 announced

6.2L, 26mpg

11.5:1 compression

>450hp, >450ft-lbs torque

the LT1 is the powerplant for the C7.
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Old 10-24-2012, 09:37 AM   #2
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http://www.autoblog.com/2012/10/24/m...ce=twitterfeed
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Old 10-24-2012, 09:45 AM   #3
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Quote:
Originally Posted by lemming View Post
Sounds like impressive tech, but that autoblog post is weirdly breathless. Up at least 20 hp over the outgoing engine? That's 5 percent. I'm not sure I'd call that "a far higher specific output" than the outgoing engine.
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Old 10-24-2012, 09:47 AM   #4
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direct injection, cylinder deactivation and regular unleaded fuel are the major things.

same torque numbers as LS7 (Z06 motor) is impressive.

this engine obviously will see broad application in GM's portfolio, so the torque is actually more important than the peak HP number (GMT900s).
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Old 10-24-2012, 03:10 PM   #5
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I'm also pleased they kept the push rod format. It's "old tech" but it seems to have worked quite well for GM. Their pushrod V8s also (I think) are smaller physically, lighter, less mechanically complicated, yet still deliver pretty good MPG number (in the Corvette at least) than the newer overhead cam V8 engines that you see in other sports cars.
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Old 10-24-2012, 03:16 PM   #6
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an appealing aspect is compactness and low CG. they are able to keep hood height down.

direct injection and cylinder shutoff (as on the new viper) are nothing to sneeze at, though.
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Old 10-24-2012, 08:44 PM   #7
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They named it the LT1? Interesting.

Being the owner of a 6.2L small-block that gets a little less than 450 hp and, er, MUCH less than 26 mpg, I'm intrigued. I was not really into cylinder deactivation, but I wonder if it'll be smoothed out a bit in the gen5 engines.
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Old 10-24-2012, 09:23 PM   #8
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Quote:
Originally Posted by lemming View Post
an appealing aspect is compactness and low CG. they are able to keep hood height down.

direct injection and cylinder shutoff (as on the new viper) are nothing to sneeze at, though.
Speaking of this I wonder how the new vettes front end is going to look with the new pedestrian safety standards that have ruined the looks of almost all front engined cars out there.
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Old 10-25-2012, 01:40 PM   #9
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Speaking of this I wonder how the new vettes front end is going to look with the new pedestrian safety standards that have ruined the looks of almost all front engined cars out there.
I don't think it'll be too bad.

From what I understand there needs to be a certain clearance between the hood surface and hard points under the hood (notably the engine). But in a Corvette the engines are stuffed so far back in the chassis, well behind the front axle line. By the time the hood covers them I think it'll be high enough over the engine due to other design parameters that it won't be a concern. For instance, there will be some height stack for the foot well, plus room for the steering column and then the dash so that the base of the windshield will be reasonably high enough. Draw a line (more or less) from the base of the windshield out to the front of the long nose on the car and I think the engine block and intakes will easily fit under that.
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Old 10-25-2012, 02:26 PM   #10
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Hopefully they will drop it into the ATS-V.
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