# BOV question

**URL:** <https://forums.speedlife.net/t/bov-question/97218>\
**Category:** SON240sx Automotive\
**Created:** [June 21, 2006, 4:40pm UTC](https://forums.speedlife.net/t/bov-question/97218 "2006-06-21T16:40:23Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Eggman](https://avatars.discourse-cdn.com/v4/letter/e/e99b99/32.png) [@Eggman](https://forums.speedlife.net/u/Eggman)\
**Post date:** [June 21, 2006, 4:40pm UTC](https://forums.speedlife.net/t/bov-question/97218/1 "2006-06-21T16:40:23Z")

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What’s the difference when you reroute to the intake or just venting out to atmosphere?

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**Author:** ![system](https://canada1.discourse-cdn.com/flex034/uploads/speedlife/original/2X/b/b7170c8eddc0b95ece6b88172b2f416a08489a45.png) [@system](https://forums.speedlife.net/u/system)\
**Post date:** [June 21, 2006, 4:57pm UTC](https://forums.speedlife.net/t/bov-question/97218/2 "2006-06-21T16:57:12Z")

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Keeps the air read by the MAFS in the system, car usually idles and runs alot better when recirculating. Prevents excess fuel dumping in to the engine when you change gears.