Chevy 305 engine
(→L30 Vortec head flow: format table) |
(→Design considerations: clarification) |
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==Design considerations== | ==Design considerations== | ||
| − | The 305 engine is much-maligned and shunned as a performance build, mainly due to its small bore diameter of 3.736" which limits breathing. Limited breathing | + | The 305 engine is much-maligned and shunned as a performance build, mainly due to its small bore diameter of 3.736" which limits breathing. Limited breathing capability will limit naturally-aspirated power potential. The primary appeal of the 305 may be due to its "underdog" appeal, or its low cost, or maybe because that's what is on hand at the time. Unless you already have a pre-'87 block, the '87-up block is preferred because of the one piece rear main seal, and the cast-in provisions for the factory hydraulic roller lifters and thrust plate for the cam (although not all blocks were provisioned for a hydraulic cam, most were). Also, these later blocks tend to display less bore wear from carb-related fuel washing of the cylinders, because most were EFI. |
==Cylinder heads== | ==Cylinder heads== | ||
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