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IS YOUR BOV open or closed???
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12-31-2008, 05:25 PM | #3 |
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12-31-2008, 06:15 PM | #4 |
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it's supposed to be open under vacumm (idle)
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12-31-2008, 07:39 PM | #6 |
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1clean335i has the aa bov and charge pipe and his stays open.. another friend has the greddy and it stays shut ..?? i have no idea which its suppose to be lol
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01-01-2009, 11:49 AM | #9 |
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lol it amazes me how little people know about what they're so confident to write about.
A bov releases pressure, plain and simple. It does this by being pulled open by a preset vaccum pressure from the engine (when the engine isn't under load, i.e. under decelleration, idle.) The correct vaccum pressure for a bov for any engine is that of which it idles at. All of this means that a bov should be at least slightly open under idle and anytime the throttle is qucikly released, causing the engine vaccum to increase to the point that is the same as it is at idle or greater |
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01-01-2009, 11:57 AM | #10 | |
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Quote:
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01-01-2009, 07:49 PM | #14 |
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06-12-2009, 07:57 PM | #16 |
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Are you saying your bov stays open when idle or when you are boosting? If its under idle its suppose to stay open. If its open under boost then your bov is faulty, boost is what holds a bov close.
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06-12-2009, 09:38 PM | #17 |
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When accelerating the bov stays closed,when you let off the gas and the throttle plate closes,like in between shifts it vents the excess boost either into the atmosphere (bov) or back into the intake (DV).A Diverter Valve is not the samething as a BOV,even though they are always called the samething.A BOV vents to the atmosphere,and a Diverter valve vents back into the intake tube.I think i got that right.
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06-13-2009, 11:32 AM | #19 |
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My AA is open at idle. Closes on load, and opens at off throttle to release the excess pressure.
Had also forge dv before, but I am happy with my AA!!
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06-13-2009, 01:20 PM | #20 | |
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-on some of the race cars I have built running 30-45 psi we actually needed to use very hard spring AND run the typical vacuum source(for decel/shifting blow off) with 2 check valves and a Y fitting with the pressure source coming right after the turbo(before any pressure drops due to intercooler and TB restrictions) OPPOSITE OF THIS we had to use a VERY light spring on our twincharger(turbo into supercharger) systems as we needed to vent any positive pressure under part throttle prior to the supercharger and a vacuum reference prior to the roots blower and a pressure reference post blower. Last edited by TurboBullett@Ambient Thermal Management; 06-13-2009 at 04:05 PM.. |
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