Big block Chevy heads
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BBC heads have a few different chambers. But usually what you'll hear is "open" or "closed" chambers. In the image below, the closed chamber heads are on top, open chamber heads below. | BBC heads have a few different chambers. But usually what you'll hear is "open" or "closed" chambers. In the image below, the closed chamber heads are on top, open chamber heads below. | ||
| − | There are also "semi-closed" chamber heads like the c/n 215 heads. They are shaped more like an open chamber head, but with less volume. These heads are a decent choice for a production head especially on a smaller displacement engine (up to 454 cid). | + | There are also "semi-closed" chamber heads like the c/n 215 heads. They are shaped more like an open chamber head, but with less volume. These heads are a decent choice for a production head especially on a smaller displacement engine (up to 454 cid). Casting number 820 heads are similar to the 215 semi-closed head, but with less quench pad area. |
| − | [[File:Closed vs open chamber bbc.jpg]] | + | [[File:Closed vs open chamber bbc.jpg|thumb|left|300px|Closed chamber top, open chamber bottom]][[File:Semi-closed.jpg|thumb|350px|c/n 215 semi-closed chamber]] |
| + | [[File:Bbc 820 sc.jpg|thumb|left|350px|c/n 820]] | ||
| + | [[File:Bbc 702 cc.jpg|thumb|c/n 702]] | ||
==BBC L29 Vortec heads== | ==BBC L29 Vortec heads== | ||
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