ITT: quiet BOVs/bypass valves
#1
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ITT: quiet BOVs/bypass valves
After doing a search I have come to the conclusion that:
-Not running a BOV is not an option.
-Recirculating BOV is quiet
-Recirculating may or may not be a bad thing and is only done on AFM cars. (pretty unclear on this, but MS so speed density)
-Taking a recirc BOV and venting it to atmo is just as loud?
-Spaghetti
I'm not into the whole WHOOSH thing. I feel like I belong in F&F. I'd rather it be damn near silent when I have to release pressure because, also, I don't want to attract the wrong kind of attention (cops). All I've gathered so far is that a Bosch recirc BOV is quiet.
Excuse the ignorance, but I don't know if a BOV and bypass valve is the same thing. If they are not, I'm not sure if a bypass valve is quieter.
Some education on the subject would be appreciated. Mainly:
wut bov is quiet and gud
-Not running a BOV is not an option.
-Recirculating BOV is quiet
-Recirculating may or may not be a bad thing and is only done on AFM cars. (pretty unclear on this, but MS so speed density)
-Taking a recirc BOV and venting it to atmo is just as loud?
-Spaghetti
I'm not into the whole WHOOSH thing. I feel like I belong in F&F. I'd rather it be damn near silent when I have to release pressure because, also, I don't want to attract the wrong kind of attention (cops). All I've gathered so far is that a Bosch recirc BOV is quiet.
Excuse the ignorance, but I don't know if a BOV and bypass valve is the same thing. If they are not, I'm not sure if a bypass valve is quieter.
Some education on the subject would be appreciated. Mainly:
wut bov is quiet and gud
#2
-Recirculating may or may not be a bad thing and is only done on AFM cars. (pretty unclear on this, but MS so speed density)
recirculating is done normal because MAF\AFM's meter air and releasing air after it has been metered throws off fueling calculations causing stumbles and other issues.
You have to recirculate if your bov is after the maf\afm.
If its before the AFM\MAF you don't need to.
-Taking a recirc BOV and venting it to atmo is just as loud?
I am using a stock rx7 turbo 2 diverter valve, its just as loud as when I wasn't running anything.
-Not running a BOV is not an option.
depends on turbo and pressure, ran my T3 fine with no valve for a while, no issues
You could try muffling the bov with a container of some sort
recirculating is done normal because MAF\AFM's meter air and releasing air after it has been metered throws off fueling calculations causing stumbles and other issues.
You have to recirculate if your bov is after the maf\afm.
If its before the AFM\MAF you don't need to.
-Taking a recirc BOV and venting it to atmo is just as loud?
I am using a stock rx7 turbo 2 diverter valve, its just as loud as when I wasn't running anything.
-Not running a BOV is not an option.
depends on turbo and pressure, ran my T3 fine with no valve for a while, no issues
You could try muffling the bov with a container of some sort
#5
I am running a forge vent to atmosphere bov that i can barely hear. Wouldn't mind exchanging it for something louder of equal quality.
#6
The problem with recirculating valves is that most of them are only 1 piston therefore they are open when in vacuum and allow unfiltered air to enter into the engine.
I am running a forge vent to atmosphere bov that i can barely hear. Wouldn't mind exchanging it for something louder of equal quality.
I am running a forge vent to atmosphere bov that i can barely hear. Wouldn't mind exchanging it for something louder of equal quality.
You could use a Bosch bypass valve VTA and put a filter on it for idle situations. It is extremely quiet and only makes a "sigh". It's nearly inaudible when in recirc configuration too.
#9
Hmm I guess i'll flip my piping around and hope for some luck. You using those silicone T pipes? http://www.siliconeintakes.com/produ...3ec5ce6b7945d7
#12
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****. So many ways to go about this. I may just do the recirculating BOV and try it in recirc and in VTA and see what I like.
So other than the unfiltered air situation, I should be fine just venting a recirc? Is there a specific place you guys are getting your Bosch BOVs or a specific type (obviously recirc)?
/ignorance
So other than the unfiltered air situation, I should be fine just venting a recirc? Is there a specific place you guys are getting your Bosch BOVs or a specific type (obviously recirc)?
/ignorance
#13
you dont really need one though. It helps with boost response on gear changes, and at higher boost levels supposedly helps with turbine life, though thats yet to be proven.
Dann
Dann
Last edited by nitrodann; 04-21-2011 at 08:05 AM. Reason: Some of what i said was incorrect and the rest didnt come out how I meant it to.