Yes, Chevrolet did produce a 400 big block engine. The Chevrolet 400 was introduced in 1970 and was used in full-size vehicles such as the Impala and Caprice, as well as some trucks and heavy sedans. It was the largest stock small-block engine ever built by Chevy. However, it’s important to note that the 400 big block was not a high-performance engine produced by the factory. Instead, it gained popularity among car enthusiasts who modified and customized it for increased performance.
Contents
- What years did Chevy make the 400?
- Was the Pontiac 400 a big block?
- How much HP does a 400 big block have?
- What is the difference between Chevy 400 and 350?
- What is the difference between a 400 small block and a 400 big block?
- What did 400 SBC come in?
- Is a 350 and a 400 the same block?
- Is a Pontiac 400 the same as a Chevy 400?
- Are 350 and 400 blocks the same?
- Why is a 396 a big block but a 400 is a small block?
What years did Chevy make the 400?
The Chevrolet 400 was introduced in 1970, and used in full size (Impala, Caprice, etc. and midsize (Chevelle) through the 1976 model year. It was utilized in light duty trucks through the 1980 model year. They were quite common in early to mid 70’s full size wagons.
Was the Pontiac 400 a big block?
A Chevrolet Camaro 396 had a big block, but a Pontiac Firebird 400 did not. Buick and Oldsmobile 455s were big blocks, but a Pontiac 455 was not. A Chevrolet 348 was a big block, but a Chevrolet 350 was a small block.
How much HP does a 400 big block have?
The 400 V8: Final Mopar Big Block Engine
| 1974 horsepower | 400 | 440 |
|---|---|---|
| 2-barrel | 185 @ 4,000 | |
| 4-barrel HP | 250 @ 4,800 | 275 @ 4,400 |
| Police | 240 @ 4,800 | 275 @ 4,400 |
What is the difference between Chevy 400 and 350?
The 400 small block uses the same block as the 350 but the cylinders are bored out another 1/8″. Problem was there wasn’t a practical amount of space between cylinders and they would blow head gaskets between cylinders. Next comes the stroke compared to the bore, making it a much slower revving engine than the 350.
What is the difference between a 400 small block and a 400 big block?
Though big-block engines are significantly larger than their small-block brethren, the true difference between these two is more about displacement, bore, and stroke than strictly size. Typically, big-block engines have displacements of greater than 400 cubic inches and small block engines have a smaller displacement.
What did 400 SBC come in?
The 400 saw extensive use in full-size Chevrolet and GMC trucks; K5 Blazer/Jimmy, 1/2-ton, 3/4-ton, 1-ton, and even larger ‘medium duty’ trucks had an option to be equipped with a 400. The engine was available in midsize A-Body and full-size B-Body passenger cars until the end of the 1976 model year.
Is a 350 and a 400 the same block?
The 400 small block was a light duty expanded version of the 350 that I wouldn’t even consider buying. The bores were so big that they had to siamese the cylinders together on the outside. The stroke was too long to fit inside that block properly.
Is a Pontiac 400 the same as a Chevy 400?
The Pontiac 400 was a high performance muscle car engine. The Chevy 400, meanwhile, was primarily used on pickup trucks, which explains why strength and stability were such important factors in the design process. Just because you see a 400 in different engine names doesn’t mean that they are all the same engine.
Are 350 and 400 blocks the same?
The 400 small block was a light duty expanded version of the 350 that I wouldn’t even consider buying. The bores were so big that they had to siamese the cylinders together on the outside. The stroke was too long to fit inside that block properly.
Why is a 396 a big block but a 400 is a small block?
The larger bore spacing and higher deck height allow for a much larger maximum bore and stroke than the small block design. They made a 396 because of the 400 cube corporate limitation discussed above, in a block that could easily go to 500 cubes.
