Did they make a 400 big-block?
The 400 big-block engine was a powerful and iconic powerplant produced by General Motors in the late 1960s and early 1970s. This engine was known for its impressive displacement, robust construction, and ability to produce significant horsepower and torque. While the 400 big-block may not have been as widely produced as some of its smaller counterparts, it left a lasting impression on the automotive enthusiast community.
What is a 400 Big-Block Engine?
The 400 big-block engine was a member of General Motors' "big-block" engine family, which included larger displacement V8 engines designed for use in full-size and intermediate-size vehicles. The "400" in the name refers to the engine's displacement in cubic inches, which equates to approximately 6.6 liters. This engine was produced in various configurations, including both carbureted and fuel-injected versions, and was used in a variety of GM models, including the Chevrolet Impala, Chevelle, and Camaro, as well as the Pontiac Firebird and GTO.
Key Features of the 400 Big-Block
- Displacement: 400 cubic inches (6.6 liters)
- Cylinder Configuration: V8
- Valvetrain: Overhead Valve (OHV)
- Aspiration: Carbureted or Fuel-Injected
- Power Output: Ranged from around 300 to 375 horsepower, depending on the specific model and configuration
- Torque: Typically produced in excess of 400 lb-ft of torque
- Construction: Cast-iron block and cylinder heads
The 400 big-block was known for its robust construction and ability to handle significant amounts of power, making it a popular choice for high-performance applications and muscle car enthusiasts.
The Legacy of the 400 Big-Block
While the 400 big-block may not have been as widely produced as some of its smaller counterparts, it left a lasting impact on the automotive enthusiast community. Its impressive power output, distinctive sound, and association with iconic muscle cars of the era have made it a highly sought-after engine among collectors and enthusiasts. Today, the 400 big-block continues to be a popular choice for engine swaps and high-performance builds, as its combination of displacement, power, and durability make it a formidable powerplant.
What is a 572 hemi?
"What you're seeing here is a 572-cubic-inch Hemi (that's 9.4L) that utilizes twin NRE 88mm turbochargers, twin intercoolers, and a computer-controlled dual-injection system that switches automatically between 91 and 116 octane fuel when the octane threshold is reached."
Did Chevy ever manufacture a 400 small block?
The connecting rod was also 400 specific being 5.565 in (141.4 mm) as opposed to the 5.7 in (144.8 mm) rod used in all other small-block Chevrolet engines. The 400 was made in 4-bolt main journal from 1970 to 1972 and in 2-bolt main journal from 1973 to 1979.
Did Ford make a 400 big block?
The 400 was intended as a replacement for Ford's aging big-block designs. The block's architecture borrowed heavily from the Cleveland, including the bore spacing, but 1.09 inches of additional deck height were added to allow a 4.00-inch stroke and the potential for plenty of torque.
Are the Pontiac 400 and 455 the same block?
We took the question to David Butler of Butler Performance in Lawrenceburg, Tennessee, for his professional opinion. He advises, "With the exception of the mid- to late-1970s PN 500557 casting, we consider all Pontiac 400 blocks functionally identical. The 455 blocks from 1970 to 1976 are also functionally identical.
What cars had a 409 engine?
The 409 remained on the Chevy options sheet through 1965, after which it was replaced by the next-generation 396 Big Block. As it stands, you'll regularly still find the early '60s Impala SS with an original 409 in it.
Is there a 400 big block?
The last big block Chrysler engine was produced in August 1978; they were still standard in the 1978 Chrysler Newport and New Yorker (the 440 was optional). In this application, the 400 had a four-barrel carburetor, had the same 8.2:1 compression, and was rated at 195 horsepower and 305 pound-feet of torque.
Did Pontiac make a 400 big block?
Pontiac differed from other GM Divisions and most other manufacturers in producing only a single sized V8 casting, rather than adding a larger big block to its line-up. The external dimensions of all their V8s, from 326–455 cu in (5.3–7.5 L) were the same.
Did Chevy ever make a 400 big block?
Despite being 6 cubic inches (98 cc) larger, Chevrolet continued marketing it under the popular "396" label in the smaller cars while at the same time labeling it "Turbo-Jet 400" in the full-size cars. Applications: 1965 Chevrolet Corvette. 1965–1972 Chevrolet Chevelle.
Is a Chevy 400 a small-block or a big block?
Referred to as a "small-block" for its size relative to the physically much larger Chevrolet big-block engines, the small-block family spanned from 262 cu in (4.3 L) to 400 cu in (6.6 L) in displacement.
Is a 351 modified 400 a big block?
The 351M/400 used the “Big Block” bellhousing bolt pattern.
