Vortec L31 cylinder head
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The L31 Chevy Vortec cylinder head is the best flowing production head for the Gen I SBC engine. They are made of cast iron, have 64cc combustion chambers (actual size is closer to 66-68cc) and 170cc intake runners. | The L31 Chevy Vortec cylinder head is the best flowing production head for the Gen I SBC engine. They are made of cast iron, have 64cc combustion chambers (actual size is closer to 66-68cc) and 170cc intake runners. | ||
| − | Because of the superior port and combustion chamber designs, total timing requirements for maximum power is 4-6 degrees less than the earlier heads. | + | Because of the superior port and combustion chamber designs, total timing requirements for maximum power is 4-6 degrees less than the earlier non fast burn heads. |
==Design limitations and modifications== | ==Design limitations and modifications== | ||
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