A 50th Anniversary story on the '57 Chevrolet is so historicallysignificant that we ought to set the stage. First, to say that the '57Chevrolet has been immensely popular for the last 18,250 days would bean understatement. Second, if space allowed, this entire issue couldphoto and feature only '57 Chevrolets. Third, because every '57 factorystyling cue has been countlessly written about over the last 50 years,we have excluded most from this story. Fourth, we deeply respect the carand all the sensational options that were offered. But most of all, wecare most about the history the car has created via every owner for thelast 49 years, so this is where much of our story is aimed. Here we go.Fasten your seat belt.
STYLING-WISE THEY CALLED IT A BABY CADILLAC
In taking part and parcel of the '57's overall styling stature, it isimportant to address its similar front-end appearance and rear-tailfinstyling to that of the '57 Cadillac. Yes, it was planned that way. Thepublic clamored for a drastic sheetmetal revamp, and boy did they getit. It should be noted that much changed at Chevrolet with thisbreathtaking new model. It was indeed like nothing else ever created. Its wheelbase was a few inches longer, its design was wild, andengineers finished it off with new 14-inch wheels and tires said to givea "softer" ride. Everything else including Chevrolet's own initialadvertising spelled "fire breather" and "take no prisoners." The '57Chevrolet quickly proved to be a super-magnificent "one-year-wonder." Ithas gone on for fifty years as one of Chevrolet's very top models ever.Further, some 25 or so '57s were later modified and resold with '57Cadillac fins and front end . . . but that's another story.
ONE HORSEPOWER PER CUBIC INCH
When the 1957 was introduced on October 17, 1956, it could be orderedwith a 235 cubic inch six-cylinder engine as standard, or one of five optional V-8engines: a two-barrel 265 V-8 engine or the new larger 283 with 220 hpwith a single Carter four-barrel carburetor. Also available was a twinCarter four-barrel carb option with either a hydraulic camshaft (245 hp)or a solid lifter camshaft (270 hp) at about $183 extra.
Or for $480, one could order Rochester Ramjet fuel injection for either250 smooth-idle or 283 rumpty-rump idle horsepower. Chevrolet's initialads glorified the One Horsepower Per Cubic Inch attainment, and everyoneindeed took notice.
TW0 CARTER "WCFB" 380-CFM CARBURETORS
Because these "White Cast Four-Barrel" carburetors had jets and meteringrods that were on the money, performance of the optional 270hp 283 wasvery good. This was the most popular Chevy V-8 engine of the '50s andearly '60s, and it was the "engine to beat" on the street.
NEW ROCHESTER 600-CFM RAMJET FUEL INJECTION
New for 1957, a total of four different fuel-injection models evolvedthat year. Why? Well, the early No. 70174520 assembly had a sand-castaluminum fuel-meter assembly with a problematic spill-valve assembly.Its eight Q-coded nozzles were short and caused idling problems duringextended idling. The nozzles sprayed fuel into the upper portion of theintake manifold way above the intake valve. Later fuel injectionsfeatured a die-cast fuel-meter assembly with a new cranking signal valvefor better start-up. These systems also had new "R"-coded nozzles thathad a one-half-inch longer neck, which got the atomized fuel past eachintake valve and into the combustion chamber much faster, as well ascooler. The shorter nozzles were said to cause rough idling when idledfor extended periods due to heat soak.
Most stock Rochester fuel injections were adjusted lean and did notperform up to their top potential. A Kent Moore-brand manometer wasneeded to properly adjust the rich and lean stop settings on back of thefuel meter. After adjusting the enrichment screw a few turns for morefuel delivery, a fuel-injected '57 Chevy or Corvette gained muchthrottle-response and was a real powerhouse. True story: Imagine drivingin first gear at 15 mph with a 3.70:1 gear ratio. You floor the gaspedal, and in an instant, the vehicle suddenly loses traction and spinssideways before you can think. That's what the awesome throttle responseof Rochester fuel injection delivered on an already very responsiveengine.
'57 CHEVY ENGINE SPECS
|235 cid (Inline Six)||3.56"x3.94"||8.00:1||140HP@4200RPM||1 bbl|
|265 cid (V-8)||3.75"x3.00"||8.00:1||162HP@4400RPM||2 bbl|
|283 cid (V-8)||3.88"x3.00"||8.50:1||185HP@4600RPM||2 bbl|
|283 cid (V-8)||3.88"x3.00"||9.50:1||220HP@4800RPM||4 bbl|
|283 cid (V-8)||3.88"x3.00"||9.50:1||245HP@5000RPM||2 x 4 bbl|
|283 cid (V-8)||3.88"x3.00"||9.50:1||250HP@5000RPM||Fuel Injection|
|283 cid (V-8)||3.88"x3.00"||9.50:1||270HP@6000RPM||2 x 4 bbl|
|283 cid (V-8)||3.88"x3.00"||10.50:1||283HP@6200RPM||Fuel Injection|