Chevrolet Small Block Combinations - Small-Block Power
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Study this chamber for a moment. Note that there is a more pronounced hook (or kidney) between the exhaust and intake valve pockets for additional mixture direction back toward the exhaust valve and spark plug. Also note that the spark plug is pointing more directly toward the exhaust valve where it is desirable to have most of the burn take place. One other item: Distinguish the small ledge running from the plug hole to the exhaust-side wall. This aids mixture "tumble" immediately after the "swirl" that’s generated passing over the spark plug (clockwise motion as viewed in the photo). View Related Article
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