Cubic Inches
Team Owner
Joined: May 2004
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From: McKinney TX
St. Jude Donor '21-'22-'23-'24
Le Mans Master
Joined: Nov 2005
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Only 20 cubic inches less than the famous 396. I think this clearly puts the LS3 in the 'big block' displacement category. This seems to be such a great engine by accounts and apparently is the one, with some strengthening , that will be SC in the SS/Blue Devil. Still, I think it would have been great if they made the displacement of the fabulous LS3 396 cubic inches!
Team Owner
Joined: May 2004
Posts: 82,175
Likes: 1,319
From: McKinney TX
St. Jude Donor '21-'22-'23-'24
This new iteration of the storied small-block family features a revised, larger-bore cylinder block – 4.06-inch / 103.25 mm vs. the previous 6.0L's 4.00-inch / 101.62 mm bores – high-flow, LS7/L92-style cylinder heads; larger-diameter pistons; revised camshaft and camshaft timing; revised valvetrain with offset intake rocker arms; high-flow intake manifold; high-flow fuel injectors from the Z06's LS7 engine; and a new engine beauty cover.
The LS3 features an aluminum cylinder block with cast iron cylinder liners. In addition to its larger bores, which help create a 376-cubic-inch displacement, the block casting also features revisions and machining in the bulkheads that enhance its strength and improved bay to bay breathing. But while the bore of the 6.2L engine is increased when compared with the previous 6.0L engine, the engine's stroke remains at 3.62 inches (92 mm). The pistons for the larger 6.2L engine also are new and are designed for its high-rpm performance capability.
The LS3 features an aluminum cylinder block with cast iron cylinder liners. In addition to its larger bores, which help create a 376-cubic-inch displacement, the block casting also features revisions and machining in the bulkheads that enhance its strength and improved bay to bay breathing. But while the bore of the 6.2L engine is increased when compared with the previous 6.0L engine, the engine's stroke remains at 3.62 inches (92 mm). The pistons for the larger 6.2L engine also are new and are designed for its high-rpm performance capability.
Moderator
Joined: Dec 2002
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From: Lakewood Ranch, FL
Only 20 cubic inches less than the famous 396. I think this clearly puts the LS3 in the 'big block' displacement category. This seems to be such a great engine by accounts and apparently is the one, with some strengthening , that will be SC in the SS/Blue Devil. Still, I think it would have been great if they made the displacement of the fabulous LS3 396 cubic inches!
One of the early Chevy Big Blocks was a 348ci motor. One of my buddies had a '61 convertible with 350horse 3x2.
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Le Mans Master
Joined: Aug 2000
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From: Las Vegas NV
Doesn't mean its not a good motor -- technically, the 2006-2008 LS7 is a small block too -- and its arguably the the strongest/best engine GM ever put in a production car.
Melting Slicks
Joined: Nov 2003
Posts: 3,375
Likes: 1
From: Northern CA
The General gives the bore and stroke as
103.25mm x 92.0mm with a displacement of 6162cc = 6.162 L = 376 in^3
using their bore and stroke I get 6.162370 L and 376.0509 in^3 which rounds to 6.16 L and 376 in^3 to 3 significant figures.
http://media.gm.com/us/powertrain/en...r/2008_LS3.xls
Team Owner
Joined: May 2004
Posts: 82,175
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From: McKinney TX
St. Jude Donor '21-'22-'23-'24
Since we are being retentive...
The General gives the bore and stroke as
103.25mm x 92.0mm with a displacement of 6162cc = 6.162 L = 376 in^3
using their bore and stroke I get 6.162370 L and 376.0509 in^3 which rounds to 6.16 L and 376 in^3 to 3 significant figures.
http://media.gm.com/us/powertrain/en...r/2008_LS3.xls
The General gives the bore and stroke as
103.25mm x 92.0mm with a displacement of 6162cc = 6.162 L = 376 in^3
using their bore and stroke I get 6.162370 L and 376.0509 in^3 which rounds to 6.16 L and 376 in^3 to 3 significant figures.
http://media.gm.com/us/powertrain/en...r/2008_LS3.xls
Not enough significant digits in the inches measurements.
Racer
Joined: May 2007
Posts: 260
Likes: 0
From: Holbrook NY
Only 20 cubic inches less than the famous 396. I think this clearly puts the LS3 in the 'big block' displacement category. This seems to be such a great engine by accounts and apparently is the one, with some strengthening , that will be SC in the SS/Blue Devil. Still, I think it would have been great if they made the displacement of the fabulous LS3 396 cubic inches!
Seeing how we get 400+ HP out of what is basically a small block engine today, it is fun to imagine how much power could be had today in a production Corvette from, say, an aluminum version (to get the weight down) of the old but real big blocks out at 427 or 454 cu in.
Thread Starter
Burning Brakes
Joined: Jan 2002
Posts: 1,147
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From: Geismar LA
