The 1972 Chevrolet Chevelle SS arrived during a time of change for muscle cars. Following
The 1972 Chevrolet Chevelle SS had a 3.31:1 gear,
the strongest performance ratio available at the time.
Production totals for the 402- and 350-cube SS Chevelles are sketchy, but some sources put the number around 60,000. Chevy researchers say 9402 SS 454 Chevelles were built for ’71.
For ’72, the net horsepower ratings kicked in and engines were rated with all their power-robbing accessories attached. The LS-5 454’s rating under this system was 270 horsepower. The Turbo-Jet 400 came in at 240 net horsepower. Few of these big blocks were ordered, though, as SS Chevelle buyers opted for an expanded range of more docile V-8s. There was the 350 in 165-and 175-horse trim, and this year even the 130-horsepower 307 was available in an SS.
The Super Sport package itself changed little and still made the Chevelle look brawny, no matter the engine. All LS-5s were mated to the Rockcrusher four-speed, while the other V-8s got either the three- or four-speed manual, depending on horsepower. And since power had fallen to ranges that wouldn’t damage the Powerglide two-speed automatic, it now joined the Hydra-matic on the options list. A 3.31:1 gear was now the strongest performance ratio available.
Chevelle SS production fell to 24,946. The LS-5 found only 5333 takers, including a handful who ordered SS 454 convertibles, the last of the Super Sport Chevelle ragtops.
Chevy built nearly 296,000 SS 396 and SS 454 Chevelles from 1968-72. No muscle car ever had a higher-volume four-year run. The Super Sport Chevelle: quantity and quality.
|Engine Type||V-8/Bog block/Mark IV||V-8/Big block/Mark V|
|Horsepower @ rpm: ||350 @ 5200|
375 @ 5600*
300 @ 4800 (1971)
240 @ 4400 (1972)
|360 @ 4400 (1970)|
365 @ 4800 (1971)
450 @ 5600 (1970)**
|Torque (pounds/feet) @ rpm ||415 @ 3400|
415 @ 3600*
400 @ 3200 (1971)
345 @ 3200 (1972)
|500 @ 3200 (1970)|
465 @ 3200 (1971)
500 @ 3600 (1970)**
|Compression Ratio ||10.25:1/8.5:1 ||10.25:1/11.25:1**/8.5:1|
|Bore (inches) ||4.12||4.25|
|Stroke (inches) ||3.76 ||4.00|
|Valve Lifters ||Hydraulic ||Hydraulic/Mechanical|
|0-60 mph (sec)||5.8|
|0-100 mph (sec) ||15.2 |
|1/4-mile (sec) ||14.41 @ 97.35 mph |
|Top speed (mph)||115 (est)|
|Axle ratio ||3.55:1 |
|Engine type ||396/325|
*Source: Car and Driver (1969)
|0-60 mph (sec)||6.0 (est)|
|0-100 mph (sec) ||14.20|
|1/4-mile (sec) ||14.20 @ 100 mph |
|Top speed (mph)||120 (est)|
|Axle ratio ||3.31:1 |
|Engine type ||454/360 LS-5|
*Source: Muscle Car Review
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