# BOV which side to put it on?

**URL:** <https://forums.speedlife.net/t/bov-which-side-to-put-it-on/116174>\
**Category:** SON240sx Automotive\
**Created:** [June 10, 2008, 11:30pm UTC](https://forums.speedlife.net/t/bov-which-side-to-put-it-on/116174 "2008-06-10T23:30:50Z")\
**Posts on this page:** 1\
**Showing post:** 12

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**Author:** ![Jedi\_Car\_Fan](https://avatars.discourse-cdn.com/v4/letter/j/b9e5f3/32.png) [@Jedi\_Car\_Fan](https://forums.speedlife.net/u/Jedi_Car_Fan)\
**Post date:** [June 12, 2008, 5:37pm UTC](https://forums.speedlife.net/t/bov-which-side-to-put-it-on/116174/12 "2008-06-12T17:37:37Z")

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> [@New toys](https://forums.speedlife.net/t/new-toys/17282/4):
>
> The logic doesn’t follow though…
> 
> Air is a fluid. It’s flowing in the direction of your TB. When the throttle plate closes, it’s going to seek the closest exit. If your BOV is on the hot-side, it has to flow against itself to get back to the BOV.

Maybe I’m confused but when the TB closes it technically reverses the flow (hence it going back at the turbo). There for, it would not flow against itself in order to get back.

Even without a BOV, when the TB closes the flow will be reversed back to the turbo unless the pressure is so goddamn strong that it forces the TB open.

Another thing I’d be interested in knowing is how much of the pressure actually gets dumped because I have a feeling not all of it gets out (think of how big the IC is and how much piping there is) for all of that to discharge every so briefly when the BOV opens seems unlikely to me considering most BOV’s have what a 1’’ opening ?

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