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Spend enough time around car people and you'll hear endless debates about the greatest engine ever built — the 2JZ, the flat-six, the Hemi. But the question of the most prolific engine humanity has ever bolted into a vehicle has a clear, surprising answer: it's not some humble economy four-cylinder that ferried commuters from Manchester to Mexico City. It's a high-revving, pushrod V8 — the kind of engine you'd expect to find in a muscle car or a supercar — and it has been running continuously for seven decades.
That engine traces its roots to the mid-1950s, when America was booming and its homegrown car industry was hitting its stride. While Europe was gearing up to putter around in Minis and Fiat 500s, the USA needed something more, well, American, to mobilize its postwar population: a V8 for the masses. In just a matter of months, an engine was developed that would serve the company that designed it for generations. And that engine still survives today — you can find it in everything from muscle cars, to hot rods, to supercars. Not bad for a 70-year-old V8.
The Chevy Small-Block V8 Is The Most Popular Engine Ever
Some days it seems like every car on YouTube is powered by Toyota's legendary 2JZ engine, but this is not the most popular mill on earth (maybe just on the internet). It's not the flat-four that made its way to the back of the Volkswagen Beetle either, or the company's EA888, which seems to eventually find its way into every Wolfsburg hot hatch, whether it likes it or not.
The most ubiquitous engine of them all is, in fact, the humble yet bulletproof Chevrolet small-block V8. Since it arrived in 1955, the company has sold more than 108 million units of this engine — roughly equivalent to one for almost every single person in the Philippines (population: approximately 114 million).
The Chevy Small Block V8 Has Evolved Over The Years To Keep Up With The Changing Times
The Chevy small-block V8 has survived seven decades, but that doesn't mean it hasn't been updated along the way. The engine has evolved significantly over time, yet it retains the same fundamental architecture it debuted with in 1955: a valvetrain featuring two overhead valves per cylinder operated by a single camshaft and 16 pushrods. Throughout its long production run, bore spacing has remained fixed at 4.40 inches apart.
The Small Block V8 Has Featured In Dozens Of Chevy Models Over The Years
The small-block Chevy V8 has featured in a multitude of different cars, including the gorgeous C1 Corvette. The first iteration, the aptly titled Generation I, began life in 1955 with 162 horsepower and eventually produced 490 horses in the base C8 Corvette. It did reach higher outputs along the way, of course, thanks to forced induction — but we'll get to that shortly.
A Closer Look At The Chevy Small Block V8
1955 Small Block Chevy V8 Specs
Source: Chevrolet
The small-block Chevy V8 has powered everything from race cars, to boats, to trucks, but it all started in the mid-fifties. It was in 1955 that GM and Chevy launched the original small-block V8, the 265 CID — simple, light, and, at 150 lbs lighter than comparable engines, the lightest V8 on the market at the time. Chief engineer Ed Cole was determined that the new engine would be neither over-complicated nor expensive to maintain; he recognized the long-term potential of his design from the very beginning.
This Revolutionary Engine Was Developed In Just A Few Months
The engine was designed in just three months, and 15 months after the design work had begun, the tools were ready for pilot production. The engine used a number of clever ideas to make it simple and cheap to manufacture. The intake manifold was one casting that incorporated a number of features and functions. The cylinder head could be placed on either side of the block simply by rotating it 180 degrees, saving costs and simplifying assembly.
The Small Block V8 Grew In Power And Displacement Over The Years
The engine went to work in the likes of the Bel Air and the Corvette, the latter seeing serious power hikes in 1956, with up to 240 horsepower courtesy of two four-barrel carburetors and a high-lift camshaft. The small-block Chevy was born, and over the years it would become the bedrock of Chevy's car production.
The Most Powerful Version Of The Small Block In A Chevy
2019 Chevrolet Corvette ZR1 Specs
Source: Chevrolet
Taking the title of the most powerful Chevrolet with a small-block engine is the C7 Corvette ZR1. The ZR1 features a Gen-V LT5 fitted with a 2.65-liter Eaton supercharger to produce 755 horsepower at 6,400 rpm. The sports car, which is seen by some as the best Corvette ever, is the last front-engined 'Vette. And while it didn't have a supercar-spec mid-engined layout, this is a hypercar in disguise.
The ZR1 May Trace Its Engine Back 70 Years But It Is A Thoroughly Modern Supercar
The ZR1 features carbon-ceramic brake rotors as standard, magnetorheological dampers, and carbon fiber practically everywhere you look. The small-block V8 delivers a hefty 715 lb-ft of torque at 4,400 rpm, and the ZR1's top speed is 212 mph. Standing quarter mile? That'll be 10.8 seconds at 135 mph. What better proof that Ed Cole's design really did have longevity than a modern supercar capable of traveling more than three times the highest national speed limit in America?
What Is The Future For The Chevrolet Small Block V8?
With manufacturers trying to figure out what future electric-powered muscle cars will look like, many gearheads were coming to terms with the possibility that the gas-powered V8 was running its final lap of the automotive circuit. After seven decades, it seemed like it might be time to wave goodbye to the Chevrolet small-block V8 and move on. Well, not quite. In something of a surprise — and probably a relief — for a lot of American car fans, GM announced in January 2023 that the small-block V8 isn't going anywhere.
There Is Good News For Fans Of The Small Block V8 (And Let's Face It, Who Isn't?)
GM said it has plans to invest $918 million across four US manufacturing sites, including $854 million to prepare these facilities to produce the company's sixth-generation Small Block V8, cementing the future of the legendary American V8. The engine being developed, says Chevy, could power full-size trucks and SUVs, proving that small-blocks still have a place at the automotive table.
Sources: Hagerty.com; Chevrolet.com.
