# need compression specs

**URL:** <https://forums.speedlife.net/t/need-compression-specs/30218>\
**Category:** NYSpeed Automotive\
**Created:** [June 1, 2007, 10:08am UTC](https://forums.speedlife.net/t/need-compression-specs/30218 "2007-06-01T10:08:52Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![AShort](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/ashort/32/4947_2.png) [@AShort](https://forums.speedlife.net/u/AShort)\
**Post date:** [June 1, 2007, 10:08am UTC](https://forums.speedlife.net/t/need-compression-specs/30218/1 "2007-06-01T10:08:52Z")

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hey a guy i work with has a 70 firebird with a 74 400 engine in it, does anyone know what the compression test specs are for the 400? thanks