Is the 327 a big-block or small block?
The Chevrolet 327 engine is a classic and highly regarded engine in the world of automotive enthusiasts. However, there is often confusion about whether it is classified as a big-block or a small-block. In this article, we’ll clear up the confusion and provide some historical context about this iconic engine.
The 327: A Small-Block Engine
The Chevrolet 327 is unequivocally a small-block engine. Introduced in 1962, the 327 was part of Chevrolet’s small-block V8 engine family, which debuted in 1955. The small-block designation refers to the engine's physical size and architecture, which is more compact compared to Chevrolet’s big-block engines.
Small-block engines, including the 327, are known for their lightweight design, high-revving capabilities, and versatility. These characteristics made the 327 a popular choice for performance cars, such as the Chevrolet Corvette and Camaro, as well as for everyday vehicles.
What Sets Small-Block Engines Apart?
To better understand why the 327 is a small-block, let’s look at the defining features of small-block engines:
- Compact Size: Small-block engines are physically smaller and lighter than big-block engines, making them ideal for vehicles where weight and space are considerations.
- Bore and Stroke: The 327 features a 4.00-inch bore and a 3.25-inch stroke, which are typical dimensions for small-block engines.
- Versatility: Small-block engines are highly adaptable and can be modified for a variety of applications, from street performance to racing.
How Does the 327 Compare to Big-Block Engines?
Big-block engines, such as the Chevrolet 396, 427, and 454, are larger and heavier than small-blocks. They are designed for high torque output and are commonly used in trucks, muscle cars, and other applications requiring significant power. The 327, being a small-block, is more focused on balance and efficiency rather than sheer size and torque.
Why the 327 Remains a Favorite
The 327 small-block engine holds a special place in automotive history due to its performance and reliability. It was available in a variety of configurations, with horsepower ratings ranging from 210 to 375, depending on the model and year. This versatility made it a favorite among car enthusiasts and racers alike.
Even today, the 327 is celebrated for its engineering and remains a popular choice for classic car restorations and hot rod builds. Its small-block design ensures compatibility with a wide range of vehicles and aftermarket parts.
Conclusion
To sum up, the Chevrolet 327 is a small-block engine, not a big-block. Its compact size, lightweight design, and impressive performance have cemented its legacy as one of the most beloved engines in automotive history. Whether you’re restoring a classic car or simply appreciating the engineering marvels of the past, the 327 stands out as a true icon.
Frequently Asked Questions
Are 327 and 350 the same block?
The larger sized main journal diameters of the 1968 327 small-block, 2.450, are the exact size of the later 350 small-block. The difference between the two is the length of stroke on the crank, 3.250 for the 327 and 3.484 for the 350.
Is a 327 more powerful than a 350?
The bottom line here is simple; no matter what you do to a 327, if you do the same thing to a 350, it WILL make more horsepower and torque than a 327 will, period. The same thing goes with ANY engine when comparing cubic inches and power, especially when you are talking about making more torque with longer strokes.
Is a Chevy 327 a small-block?
Production of the original small-block began in late 1954 for the 1955 model year, with a displacement of 265 cu in (4.3 L), growing over time to 400 cu in (6.6 L) by 1970. Among the intermediate displacements were the 283 cu in (4.6 L), 327 cu in (5.4 L), and numerous 350 cu in (5.7 L) versions.
Is a 327 and 350 block the same?
Understanding the 327 and 350 Chevy Engine Blocks
If you're wondering which specific years of 327 engines share the same block as the 350 small block engines, the answer lies in the late 1960s. Specifically, the 327 engines produced in 1968 and 1969 are the ones that utilize the same block as the 350.
Is a Chevy 327 a big-block?
The Chevrolet 327-cubic-inch V8 originated with the small-block family of engines that first appeared in 1955 with a 265 cubic inch powerplant. Following with a 283 cubic inch version that appeared in 1957, the mighty 327-inch small block made its debut in 1962.
What is the largest small-block Chevy?
The Biggest Small-Block So Far: The 400-Cubic-Inch V-8. The largest version of the Generation I small-block was the 400 (6.6 liter) .
How much HP can a 327 block handle?
Capable of supporting over 600 hp in normally aspirated trim, our relatively mild 327 was not taking full advantage of what they had to offer. These heads were chosen as much for what the 327 might become in the future (think stroker) as its current configuration.
What is considered a big block Chevy?
This engine type is characterized by the following metrics: Displacement: Big block engines tend to have displacements of 400 cubic inches or more. There are exceptions to this rule, such as the Chevy 396 engine which is referred to as a big block engine due to its architecture.
Can you turn a 327 into a 350?
This means that this particular 327 can easily be upgraded into a 350, which has become a standard in the aftermarket industry with tons of available parts. Refer to the chart on the previous page for side-by-side number comparisons.
What years did they make the 327 small-block?
The 327 was a mainstay of Chevrolet's engine lineup from 1962 through 1969, when it made its final appearance as the standard V-8 in that year's fullsize Chevys, and as a low-cost option over the base 307-inch V8 in the Chevelle, Nova and Camaro.
