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To ensure optimal engine performance, all cylinders should have a minimum reading of 140 lbs per square inch (PSI) during a compression test. The variation between the highest and lowest readings among all cylinders should not exceed 15 PSI. A larger discrepancy indicates a potential problem that can lead to a rough idle and poor engine performance.

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What is the compression on a 1982 small block 350?

8:1.


How do you identify air leak small block 350?

A compression test.


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A compression test will determine which cylinder(s) are at fault.


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