Is a Pontiac 400 the same as a Chevy 400?

Are Pontiac 400 and Chevy 400 the Same?
The Pontiac 400 and the Chevy 400 are two V8 engine models produced by General Motors in the United States. Both engines have similar characteristics, such as the same displacement, bore size, and stroke length. However, there are some differences between them that make them unique. The Pontiac 400 came first, in 1967, while Chevrolet followed in 1970 with their 400 cubic inch displacement V8 engine. Despite being made by the same company, these engines are not the same. The differences between the Chevy and Pontiac 400 are as vast as the differences between a Chevy 350 and a Dodge 340. The Pontiac 400 and Chevy 400 have different block designs, and the Pontiac 400 is considered to be stronger and more powerful than the Chevy 400, especially with stock parts. However, with aftermarket parts, the Chevy 400 can be made more powerful for cheaper, but it may not last as long as the Pontiac 400. Additionally, the Pontiac 400 has the advantage of a separate intake that does not seal or get heat from the lifter bore, while the SBC has better lifter bore support. It’s important to note that the parts for the Pontiac 400 may be harder to find and more expensive compared to the Chevy 400. Therefore, the decision between the two engines depends on factors such as specifications, performance, cost, availability, and reliability, as well as the specific needs of the vehicle being worked on.
In conclusion, while the Pontiac 400 and the Chevy 400 share some similarities, they are not the same engine and have significant differences in design, performance, and parts availability.
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What cars did the Pontiac 400 come in?

That made the 400 the top engine in Firebird and GTO for many years as it received a wide range of high-performance cylinder heads and camshafts through various iterations of the Ram Air package. The most powerful version of Pontiac’s 400 to ever reach production was the Ram Air IV.

Are Chevy and Pontiac the same?

Pontiac was a sub brand of GM. Chevy is GM’s “big” nameplate brand. Therefore, many of the sub-brand cars are rebrands/reskins of other vehicles.

Is a Pontiac 350 the same as a Chevy 350?

They are completely different. The Chevy is a small block, Pontiac has no big or small block. Everything from 326 to 455 is the same size. The advantage to this is Pontiac’s 455 is smaller than other GM 454/455 blocks, the downside is that the 350 is bigger than other small blocks.

What is the difference between a small block 400 and a big block 400?

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’s the difference between a small block 400 and a big block 400?

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.

Is A Pontiac A Chevy?

The Pontiac brand started was introduced by General Motors in 1926. It initially started out as a companion brand to GM’s Oakland. However, it soon overtook Oakland in popularity and completely replaced it by 1933. It then became a companion brand to Chevrolet until 2009 when it eventually ceased production.

Is Pontiac 455 and 400 the same block?

(It’s a minor point because) the only differences between the 400 and the 455 >BLOCKS< were the main bearing journal size (3.000″ in the 400 and 3.250″ in the 455) plus the bore size. In all other dimensions the two were identical.

How much horsepower does a 400 Pontiac have?

The 400 remained in production through the 1978 model year, with 1979 cars receiving engines produced the previous year. In basic 2-barrel form it produced 290 horsepower and 428 ft.

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 power can you get out of a Pontiac 400?

Back in the day, the most powerful 400 (Ram Air IV) made by Pontiac put out 370 hp (GTO), so 512 hp is certainly a ton more performance; all in, it’s a package that looks deceptively stock.