is the 2010 ss ls3 a big block or a small block

[430606]

I want to know if the ls3 in the 2010 ss a big block or a small block what its the cubic in


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[cheaplabor]

Technically it's neither, it's an LS. It's 376 cu in

[Cheveey57]

Small

[gmen09]

The ls series of engines are all small blocks, that includes the ls7 (427)and ls9 in the zr1 (376). It actually isn't the cubic inches that determines a small block or a big block. Back in the muscle car days chevy had to different blocks, that they created many different engines from. The small block originated as a 283, then with the same block made its way up to 350. Same with the big block, it's actually the same block among the 396 and 454, among others.

[RollaMo]

Originally Posted by gmen09

The ls series of engines are all small blocks, that includes the ls7 (427)and ls9 in the zr1 (376). It actually isn't the cubic inches that determines a small block or a big block. Back in the muscle car days chevy had to different blocks, that they created many different engines from. The small block originated as a 283, then with the same block made its way up to 350. Same with the big block, it's actually the same block among the 396 and 454, among others.

They also had a 400 cubic inch small block, and a 402 cubic inch big block.

[RollaMo]

Chevy small block:


Chevy Big Block

[Mr. iNCREDIBLE]

Essentially the only difference is the physical size of the block itself. The 427 refers to the capacity of the cylinders. In a small block 427 the cylinders will be closer together. This can cause overheating problems, which some people don't care for. However, parts for a small block engine are less expensive and more readily available than those for a big block.
There are several overlaps between the small block and big block engines in Chevy's history, for instance, the 396 big block, whereas the 400 is a small block.

[ChrisBlair]

Originally Posted by cheaplabor

Technically it's neither, it's an LS. It's 376 cu in

Thank you.

The L99 and LS3 are neither Wide Blocks nor Mark IV Blocks, so therefore, technically, it is not a 'Big Block'. There was an LS-3 back in the day but this is not the same as the one in your 5Gen

The LS series is not a development of the Small Block either, it's a new design, so when people say "is that a small block or a big block" the answer is "no". The LS series is a "Generation IV Block".

a good test: check fitment for small block Chevy parts in your LS3. How many fit?

[christianchevell]

it would be classified as a small block........though a unique new small block, so is the 427.... Big blocks actually had bigger blocks...larger cranks etc larger heads...Good god ever seen old dodge elephant motors? Nothing like a motor thats four feet wide under the hood........lol

[Mr pogo]

Originally Posted by gmen09

The small block originated as a 283, then with the same block made its way up to 350.

actually the first production small block was 265 cubes.

Originally Posted by ChrisBlair

The LS series is not a development of the Small Block either, it's a new design, so when people say "is that a small block or a big block" the answer is "no". The LS series is a "Generation IV Block".

a good test: check fitment for small block Chevy parts in your LS3. How many fit?

while the LS series was a new design it was not a completely from scratch one.
still has the same 4.4 inch bore spacing as the original small block so for all intents and purposes it still is a "small block" chebbie.

ps, sbc rods have been used in LS engine performance builds so theres one part that interchanges still lol

[ChrisBlair]

Didn't say nothing fits. I said check the fitment. In my book, unless all SBC parts fit, it's not an SBC. I can't see how you can agree it's a new design and not a new design at the same time

[Rocky1974]

Originally Posted by ChrisBlair

Thank you.

The L99 and LS3 are neither Wide Blocks nor Mark IV Blocks, so therefore, technically, it is not a 'Big Block'. There was an LS-3 back in the day but this is not the same as the one in your 5Gen

The LS series is not a development of the Small Block either, it's a new design, so when people say "is that a small block or a big block" the answer is "no". The LS series is a "Generation IV Block".

a good test: check fitment for small block Chevy parts in your LS3. How many fit?

It's a Small Block. 376 Cubic Inches.

"Wide Block"??!! That's a new one on me! Technically, it's a Gen IV Small Block. The Gen I is the original Small Block, which dates back to the 1955 265. It was also produced in 262, 283, 302, 305, 307, 327, 350, and 400 Cubic Inch Displacements. Gen II was produced from 1992 to 1997 in 265 and 350 Cubic Inch Displacements. Gen III was produced from 1997 to 2005 in 294, 325, 346, and 364 Cubic Inch Displacements. Gen IV is produced from 2005 to present in 294, 325, 364, 376, and 427 Cubic Inch Displacements. Gens III and IV are also referred to as "LS" Small Blocks. Gen V will make its debut in the 2014 Corvette and new pickups later this year, in 325 and 376 Cubic Inch Displacements. Gens I and II are similar. The major differences are reverse-flow cooling and front mounted opti-spark distributor. Rotating assemblies and small parts are interchangeable. Blocks, heads, and intakes are not. Gen III was a complete redesign, sharing only it's 4.4 inch bore spacing, bell housing pattern and hydraulic roller lifters with Gens I and II. Gens III and IV are very similar and most, but not all, parts are interchangeable. The only differences are the changes needed to accommodate AFM, 58x crankshaft reluctor wheel, relocated sensors, ETC. Gen V is another major redesign. The bottom end is based on LS architecture, but the rest of the engine is a clean-sheet-of-paper redesign. Very few parts will interchange.

[Rocky1974]

Originally Posted by ChrisBlair

Didn't say nothing fits. I said check the fitment. In my book, unless all SBC parts fit, it's not an SBC. I can't see how you can agree it's a new design and not a new design at the same time

In GM's book, it's a small block. Their book trumps your book. This reminds of people who argue that the Gen 5 Camaro is not a "F" Body. GM says it is, and since they are the manufacturer, they get to decide such matters.

[ChrisBlair]

Originally Posted by Rocky1974

It's a Small Block. 376 Cubic Inches.

"Wide Block"??!! That's a new one on me! Technically, it's a Gen IV Small Block. The Gen I is the original Small Block, which dates back to the 1955 265. It was also produced in 262, 283, 302, 307, 327, 350, and 400 Cubic Inch Displacements. Gen II was produced from 1992 to 1997 in 265 and 350 Cubic Inch Displacements. Gen III was produced from 1997 to 2005 in 294, 325, 346, and 364 Cubic Inch Displacements. Gen IV is produced from 2005 to present in 294, 325, 364, 376, and 427 Cubic Inch Displacements. Gens III and IV are also referred to as "LS" Small Blocks. Gen V will make its debut in the 2014 Corvette and new pickups later this year, in 325 and 376 Cubic Inch Displacements. Gens I and II are similar. The major differences are reverse-flow cooling and front mounted opti-spark distributor. Rotating assemblies and small parts are interchangeable. Blocks, heads, and intakes are not. Gen III was a complete redesign, sharing only it's 4.4 inch bore spacing, bell housing pattern and hydraulic roller lifters with Gens I and II. Gens III and IV are very similar and most, but not all, parts are interchangeable. The only differences are the changes needed to accommodate AFM, 58x crankshaft reluctor wheel, relocated sensors, ETC. Gen V is another major redesign. The bottom end is based on LS architecture, but the rest of the engine is a clean-sheet-of-paper redesign. Very few parts will interchange.

The Wide Blocks are the 348 series: W Blocks. Truck engines, basically