Chevy 305 engine
(→Cylinder heads: add text) |
(→Vortec L30 5.0 L 305 head: clean up) |
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===Vortec L30 5.0 L 305 head === | ===Vortec L30 5.0 L 305 head === | ||
| − | + | In 1996 the 305ci RPO L30 engine got different heads than were previously used. These heads featured revised intake bolt pattern and a small swirl vane in the intake port (the swirl vane is much smaller/different that what's used on the swirl port heads). | |
| − | + | Unfortunately the '96-up 305 Vortec heads did not get the same type combustion chamber design as the 350 Vortec. The 305 Vortec combustion chamber is similar to the swirl port head. This chamber design places the spark plug more towards the center of the chamber and slightly biased towards the exhaust valve, all of which are improvements over the old smog castings. | |
| − | + | The L30 heads use self-aligning rocker arms and the same center bolt valve covers like used since '87. They also use the same intake bolt pattern as the L31 5.7L Vortec heads, but have a smaller chamber volume (~58cc) than the 5.7L Vortec heads. The ports are a bit smaller as well (~160-165cc). | |
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| + | In addition to the 059 casting number, there is a c/n 12552520 head listed in the databases as a '96-'97-up "Vortec" head, comparable to the c/n 059 head by all appearances. | ||
===Swirl-inducing vane=== | ===Swirl-inducing vane=== | ||
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