Valve train geometry
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===Chevy small block=== | ===Chevy small block=== | ||
*Stock hydraulic flat tappet SBC- 7.8” | *Stock hydraulic flat tappet SBC- 7.8” | ||
| − | *SBC OEM hydraulic roller pushrods are 7.2” long. When using shorter | + | *SBC OEM hydraulic roller pushrods are 7.2” long. When using shorter GM OEM roller lifters from the 3.1L or 3.4L V6, or the 2.2L inline 4 cylinder engines, start with 7.500" pushrods. These lifters are mostly only used when converting a flat tappet block to use an OEM roller cam, although they might be an advantage in a roller block due to their lighter weight. |
*Crane retro hydraulic roller- 7.046" | *Crane retro hydraulic roller- 7.046" | ||
*Retrofit roller lifter pushrods are 7.300". | *Retrofit roller lifter pushrods are 7.300". | ||
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