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> Bov Question.
john1006
post Aug 17 2008, 03:48 PM
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What are the pros and cons to Open Atmosphere and Closed Loop BOVs?
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amessforone
post Aug 17 2008, 06:24 PM
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Well, from my understanding of the two different types of blowoff valves. One is used two vent the air into the atmosphere creating the characteristic sound that is often associated with turbochargers. The other which over here in North Jersey we call diverter valves basically recirculates the air into the intake without the noise. They both work to release pressure and to avoid compressor surge.

My personal opinion is that it is totally up to the user which type to use. If you want the noise then opt for the open atmosphere type and if you don't want the noise then opt for the closed loop.

Remember... You could go for a hybrid type which essentially does both and in this instance you could make it into an open atmosphere type or the closed loop type. Depends on your mood.


Hope this helps.
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fullmetalpanic
post Aug 17 2008, 08:33 PM
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pro for open loop...more choices.

cons for open loop.... The air that goes into the intake is metered, and if you let some out than there's less going into the combustion chamber than the ECU thinks...causing you to run rich between shifts.

Both open and closed can sound cool, though, open tends to be a bit louder

my personal opinion, stick with a closed system. You can get an aftermarket closed loop BOV, but dont risk throwing a bearing.
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john1006
post Aug 18 2008, 02:07 PM
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Is there any closed ones that you can actually hear? lol
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EMC 3000gt
post Aug 18 2008, 04:26 PM
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all of them.

There are no pros to not recirculating on a your car.
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BlinkRA182
post Aug 18 2008, 11:32 PM
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i can hear my stock one...with the radio off and windows up :)
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ERZperformance
post Aug 19 2008, 12:06 AM
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I like Stock BOV, because car will run rich with aftermarket open atmosphere Bov
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BlinkRA182
post Aug 19 2008, 12:36 PM
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QUOTE(aerogear2000 @ Aug 18 2008, 11:06 PM)
I like Stock BOV, because car will run rich with aftermarket open atmosphere Bov
[right][snapback]195465[/snapback][/right]


there are aftermarket BOVs that recirculate you know...
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EMC 3000gt
post Aug 19 2008, 01:17 PM
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Alot of them do


the HKS SSQV has an adapter now to re circ. I have it. its nice.
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