366 Cubic Inch small block

 

No such thing as a stupid question, its all good. Even the 427 in the Vette is a small block.

 

If you do not know, it is off of a different design than the old small/big block configurations. The new design engine is basicly one design like the old small blocks were (multiple displacements in the same outside engine size/design). So, I would say it is the new "small block".

 

Thx guys really appreciate the info

 

according to gm its a big block just a small one, 5.3 is their small block

 

idk ive heard that the 6.0 and 5.3 use the same block, just different crank and a hundred other parts.

 

according to gm its a big block just a small one, 5.3 is their small block

A little more reasurch shows that the 6.0L had both, small block and big block configuration to it. It was a big block from the 60's until the mid 90's and was used in trucks and school buses.

The current 6.0L is indeed, a small block.

Thanks Benz, I did not know this until doing a little more research

 

LS engines are basically one size small.

 

It's neither a small block or a big block. An LS block is a whole new animal compared to a SBC or BBC.

 

Big blocks ended with the 8.1 litre.
Small blocks ended with the 350 in early 1998.
The term small block started in 1955. The meaning behind them was the shear size of the engine block, most of the time. Now, GM blocks are virtually all the same in size and shape so there is no more need to designate Small or Big Block.

LS is technically a smallblock but not generalized as one. You will not hear someone say " I have a smallblock 5.3" unless it's a old school 327. It is a LS Motor.

LS engine vary from 4.8-7.0 LS7 CI and share a 3.622 Stroke.

The first LS engine was in 1997 in the C5 Vette (LS1) and in 98' in the GM F-Body Camaro/Firebird (LS1)

The 6.0 is a LS engine, but in actuality it is a small block. Another generation of GM's Smallblock.

 

LS engine vary from 4.8-7.0 LS7 CI and share a 3.622 Stroke.

The 4.8 has a 3.267" stroke crank and shares the same block and bore size as a 5.3 because of it. The LS7 ( 7.0) has a 4" stroke crank. The 5.3, 6.0, and 6.2 use the 3.622" stroke.

They are just LS blocks..... small.... big.... does it really matter when you vary displacement from 293 to 427 cubic inches in a block that has similar external dimensions.

 

GM has been all over the place with engine's over the years. Heck they even had a small block 400 and a big block 396.
As of now most of the factory production engines would be a small foot print, and getting crazy HP out of them compared to what they were pulling out of older (big blocks).

 

GM has been all over the place with engine's over the years. Heck they even had a small block 400 and a big block 396.
As of now most of the factory production engines would be a small foot print, and getting crazy HP out of them compared to what they were pulling out of older (big blocks).

400 SBC....there is a rare animal. Not as rare as a 69 302 SBC..remember those ? Pikes peak motor.

 

Now thats going back...

 

GM has been all over the place with engine's over the years. Heck they even had a small block 400 and a big block 396.
As of now most of the factory production engines would be a small foot print, and getting crazy HP out of them compared to what they were pulling out of older (big blocks).

400 SBC....there is a rare animal. Not as rare as a 69 302 SBC..remember those ? Pikes peak motor.

Fwiw
The 1967-69 302 (Z28 only) engine is the same block used for many other applications; the only thing that made it a "302" was the crank, rods, pistons, cam, and heads assembled to it, and the suffix code 'DZ' stamped on the pad - there's nothing "special" about the block. Chevrolet 302 used a 4.00" bore and a 3.00" stroke, basically a 350 block and a 283 crankshaft. They had to keep the cid under the SCCA's 305 max. cid.

 

GM has been all over the place with engine's over the years. Heck they even had a small block 400 and a big block 396.
As of now most of the factory production engines would be a small foot print, and getting crazy HP out of them compared to what they were pulling out of older (big blocks).

400 SBC....there is a rare animal. Not as rare as a 69 302 SBC..remember those ? Pikes peak motor.

The 302 was a bad ass lil engine

 

The 302 was a bad ass lil engine

Chev made a 302?!?! That's wild I always thought only ford had!

 

I know lots of guy used to swap cranks between the 327 and the 283 for different torque and HP gains.

 

Like others said, the current family of GM V-8's, (in production vehicles, anyway), are called LS engines. Completely different than the old Small blocks and Big-Blocks.
If one had to put them in one category or the other, they would definitely be considered small blocks, but because the design is so completely different, folks just call them LS motors.
As for non-production vehicle crate engines, you can buy a 572 cubic inch crate big-block form GM, (9.4 Liters), with a pump gas option that puts out 620 HP, or a higher compression race gas version, good for 720 HP. And they come with a 1 year warranty! :mrgreen:

 

just a quick point, but generally these terms refer to a family of blocks with the same external dimensions. there can be all kinds of differences within a block family, e.g., there are small blocks with different journal sizes, siamese vs nonsiamese bores, one vs two piece main seal, etc. and even external dimensions can vary sometimes, e.g., tall or short deck versions of a given block.

 

Like others said, the current family of GM V-8's, (in production vehicles, anyway), are called LS engines. Completely different than the old Small blocks and Big-Blocks.
If one had to put them in one category or the other, they would definitely be considered small blocks, but because the design is so completely different, folks just call them LS motors.
As for non-production vehicle crate engines, you can buy a 572 cubic inch crate big-block form GM, (9.4 Liters), with a pump gas option that puts out 620 HP, or a higher compression race gas version, good for 720 HP. And they come with a 1 year warranty! :mrgreen:

Gm hasn't used the "current" ls platform since 2014. There are no more ls engines.

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Like others said, the current family of GM V-8's, (in production vehicles, anyway), are called LS engines. Completely different than the old Small blocks and Big-Blocks.
If one had to put them in one category or the other, they would definitely be considered small blocks, but because the design is so completely different, folks just call them LS motors.
As for non-production vehicle crate engines, you can buy a 572 cubic inch crate big-block form GM, (9.4 Liters), with a pump gas option that puts out 620 HP, or a higher compression race gas version, good for 720 HP. And they come with a 1 year warranty! :mrgreen:

Gm hasn't used the "current" ls platform since 2014. There are no more ls engines.

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The Chevy SS did still use it (LS3) until production shut down in 2017.

 

Yeah and I forgot about the 6.0 in the hd trucks. I need my morning coffee.

But it's still not really the "current" family of gm engines. Since the ecotec took over.

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Yeah and I forgot about the 6.0 in the hd trucks. I need my morning coffee.

But it's still not really the "current" family of gm engines. Since the ecotec took over.

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but those ecotec blocks are externally the same as the earlier ls engines, no?

 

Nope. Nothing is the same. There were a bunch of articles that came out about them back in 2013 when they were first being released.

There are also some articles about people converting their ls swaps to the new lt engine wheee they have to change the motor mounts and whatnot

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The new ecotec motors are more similar to an LT1 than the LS motors. But even at that, there are still differences.