# 2009 zrLOSE about to go under the knife....

**URL:** <https://forums.speedlife.net/t/2009-zrlose-about-to-go-under-the-knife/250910>\
**Category:** Builds\
**Created:** [March 14, 2010, 7:02am UTC](https://forums.speedlife.net/t/2009-zrlose-about-to-go-under-the-knife/250910 "2010-03-14T07:02:57Z")\
**Posts on this page:** 1\
**Showing post:** 143

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**Author:** ![Eatonualive](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/eatonualive/32/6442_2.png) [@Eatonualive](https://forums.speedlife.net/u/Eatonualive)\
**Post date:** [May 18, 2011, 10:18am UTC](https://forums.speedlife.net/t/2009-zrlose-about-to-go-under-the-knife/250910/143 "2011-05-18T10:18:47Z")

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> [@The dangers of breakdancing](https://forums.speedlife.net/t/the-dangers-of-breakdancing/42296/8):
>
> and whats the dumb valve for anyways? limit boost for MPG??? or some shit?
> 
> if so its fucking dumb. its a super car, not a grocery getter! Superchargers we built to be consistant boosters.

almost everything affects a blowers boost output. the more efficient your heads are or if you have certain cams or longtube headers, etc. that will all lower your boost output with the same pulley combo (its making your motor more efficient). then when you make it colder your iats drop and the efficiency of the blower goes up and makes more boost. it goes both ways. its weird. and roots and twin screw blowers have bypass valves so the blower isnt boosting at idle or when ur cruising.

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