A Tale of Two Camshafts

For example, Keith Black KB157 hypereutectic pistons (0.5 cc dome) with proper head gasket selection will increase the actual compression ratio to near 10.5:1, and the late-closing inlet valve can tolerate higher than OE compression ratio. Despite what GM advertised, the typical as-built compression ratio of 327/300s is about 9.7:1. ................
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