IntroductionThe Corvette has always been celebrated for its striking good looks, but it's worth remembering that the car has also served as the launching pad for some of the most powerful and technologically advanced powerplants in General Motors history. The '53 Blue Flame Six was a gallant-if humble-beginning, and as the decades have rolled on, we've been treated to an amazing array of hardware, from big-block monster motors to small-cube screamers and everything in between.
Let's open some hoods and take a stroll through the first wing of the Corvette Engine Hall of Fame.
'53 Blue Flame SixWith the 265 V-8 a few years off, Chevy engineers applied a few hot-rodding tricks to the 235 inline-six in order to get their new fiberglass sports car up and running. The stock '53 235 put out only 115 hp. But with the help of three one-barrel carbs, a special intake manifold, solid lifters, 8:1 compression, and a high-lift cam, the little Chevy truck motor pulled 150 hp-a 30 percent increase. Yes, it was an underwhelming debut, but it all had to start somewhere.
SpecsDisplacement: 235 ciHorsepower: 150 @ 4,200 rpmTorque: 223 lb-ft @ 2,400 rpmCompression: 8:1Component materials: Cast-iron block and heads, aluminum pistonsInduction: Three one-barrel Carter "YH" carburetorsExhaust: Cast-iron manifold, dual exhaust pipesYears offered: '53-'55
'55 265 Small-BlockZora Arkus-Duntov knew that in order for the Corvette to be taken seriously as a sports car, more power was needed. Fortunately, Chevy's new 265 "small-block" V-8 cranked out 195 hp, an increase of 60 horses over the Blue Flame Six. Although the '55 Corvette appeared virtually identical to the '53 and '54 models (paint colors aside), the increased power made the car magazines take notice. The sexy Corvette finally had some grunt to back up its good looks.
SpecsDisplacement: 265 ciHorsepower: 195 @ 5,000 rpmTorque: 260 lb-ft @ 3,000 rpmCompression: 8:1Component materials: Cast-iron block and headsInduction: One four-barrel Carter carburetor with low-restriction air filterExhaust: Cast-iron manifolds, dual exhaust pipesYears offered: '55-'56
'57 283 Ram Jet Fuel-Injected Small-BlockFuel injection was standard fare on world-class sports cars by 1957, and Duntov wanted Corvette buyers to have a taste of American exotica. The year after the Corvette's first major styling change was highlighted by the new $484 to $726 Fuelie option. This 283hp option not only looked exotic, with its large-plenum chamber and fuel-metering controls, but it gave the Corvette sub-6-second 0-60 times, 14.3-second quarter-mile potential, and a top speed of 132 mph.
The Fuelie would live on for nine years as the top Corvette engine before being replaced in 1966 with the less finicky 427 big-block. Fuel injection would not reappear in a Corvette for another 16 years.
SpecsDisplacement: 283 ciHorsepower: 283 @ 6,200 rpmTorque: 290 lb-ft @ 4,400 rpmCompression: 10.5:1Component materials: Cast-iron block and heads, aluminum pistonsInduction: Rochester mechanical fuel injectionExhaust: Cast-iron manifolds, dual exhaust pipesears offered: '57-'61
'65 327 Fuel-Injected Small-Block L84From 1957 to 1964 the baddest Corvette available was the Fuelie model. These cars weren't always easy to live with, however. In fact, many frustrated owners actually retrofitted their Fuelie Corvettes with carburetor setups.
As the years rolled on, engineers improved intake-manifold and carburetor designs so much that by 1965, it was easier to make power with a carbureted engine than it was with a fuel-injection setup. Although the Fuelie's horsepower was up to 375, the new 396-cube 425hp L78 overshadowed the smaller engine.
SpecsDisplacement: 327 ciHorsepower: 375 @ 6,200 rpmTorque: 350 lb-ft @ 4,400 rpmCompression: 11:1Component materials: Cast-iron block and heads, aluminum pistonsInduction: Rochester mechanical fuel injectionExhaust: Cast-iron manifolds, dual exhaust pipesYears offered: '63-'65
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