# i have 2 SBC questions having to deal with HP

**URL:** <https://forums.speedlife.net/t/i-have-2-sbc-questions-having-to-deal-with-hp/187560>\
**Category:** PittSpeed Automotive\
**Created:** [January 21, 2007, 7:11pm UTC](https://forums.speedlife.net/t/i-have-2-sbc-questions-having-to-deal-with-hp/187560 "2007-01-21T19:11:54Z")\
**Posts on this page:** 1\
**Showing post:** 37

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**Author:** ![eurodad](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/eurodad/32/5988_2.png) [@eurodad](https://forums.speedlife.net/u/eurodad)\
**Post date:** [January 23, 2007, 5:15pm UTC](https://forums.speedlife.net/t/i-have-2-sbc-questions-having-to-deal-with-hp/187560/37 "2007-01-23T17:15:26Z")

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> [@Official NHL playoffs thread](https://forums.speedlife.net/t/official-nhl-playoffs-thread/27476/26):
>
> yeah, but we cant get it tuned right, the idle mixture screws on the carb dont seem to work, checked for vacuum leaks and found none, checked the vacuum and it seemed good, and the carb was rebuilt.
> 
> (the carb is a holley 600cfm, but i plan on getting a 750)

how much vacuum is the motor making at idle?

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