How to Make a Loud BOV Quiet.
3 Attachment(s)
Wrap that bitch in foam.
Attachment 208862 Attachment 208863 Attachment 208864 It's a lot quieter now. Just easing around town without boosting, I don't hear it. Before you'd hear it no matter what. If I get on it some and make a few PSI, I sometimes here it, but barely. Probably not audible from outside the car. Full boost, you hear it, but it's not much louder than at a few PSI. I'm gonna try wrapping a little piece of metal around the foam where the BOV vents tomorrow. This may make it quieter and will help keep from blowing all the foam out. Currently have 3 zip ties holding the foam. The intake is now 10x louder than the BOV. Working on a solution there too. |
I have to assume you like your cars quiet. I don't think you would enjoy my car! :giggle:
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why didn't you just recirc. it?
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Originally Posted by Rafa
(Post 358403)
I have to assume you like your cars quiet. I don't think you would enjoy my car! :giggle:
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LOL pat and his never ending quest for all things quiet:giggle:
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Hahaha Someone wants a sleeper...
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How to Make a Loud BOV Quiet.
Wrap that bitch in foam. NOT...you probably reduced the flow by a good amount. BOVs or BPVs need to be fast-acting in order to shift huge quantities of air before the charge line between the compressor and throttle body shoots up in pressure, thus causing a reversal of flow and the resultant turkey gobble. Use a bypass valve if you want a quiet BOV. If its good enough for Formula 1 and every single OEM or factory racecar ever made, its good enough for you. subaru has the best OEM bypass valve and you can have one for $20 if you look. |
with his intake consisting of a 6" (just a guess) pipe I seriously doubt recirculating the air back there will make it any quieter...that is unless he'd extend the intake and install the stock airbox or something.
is that a heat shield you are working on in the first picture Pat? |
Anything is quieter than a blowoff valve. I have a 6" pipe too and I can barely hear my bypass valve.
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Originally Posted by the_pipefather
(Post 358414)
anything is quieter than a blowoff valve. I have a 6" pipe too and i can barely hear my bypass valve.
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Basically I couldn't recirculate it. At least, not easily. The intake is basically a filter on the turbo, with no room for anything else.
Yes I'm going for the sleeper look, and sound matters too. :fawk: Whether it hurt flow or not... I really don't care. This turbo surges/flutters (whatever it's called) when I shift below 3500. That is, until the BOV finally stops dragging it's ass and opens. Still does the same thing as before with the foam, only now I hear "flutter-flutter-silence...". I should probably get a softer spring for the BOV so it will open sooner. I'm gonna wrap the air filter in foam too after I build enough heat shields to feel safe doing it. Don't care if that hurts performance either. I want a quiet, reliable, fast car. In that order. :giggle: |
Originally Posted by 18psi
(Post 358413)
is that a heat shield you are working on in the first picture Pat?
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Originally Posted by patsmx5
(Post 358418)
Basically I couldn't recirculate it. At least, not easily. The intake is basically a filter on the turbo, with no room for anything else.
Originally Posted by patsmx5
(Post 358418)
This turbo surges/flutters (whatever it's called) when I shift below 3500.
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Originally Posted by mazda/nissan
(Post 358460)
I now understand
if "some" users had let lazzer finish his electronic BOV this could have be remedied :) |
Side note- I keep looking on google for info on how to make an intake quiet, and all I'm getting is "how do I make my intake louder"....
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Originally Posted by patsmx5
(Post 358467)
Side note- I keep looking on google for info on how to make an intake quiet, and all I'm getting is "how do I make my intake louder"....
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There are electric BOV's out there.. I've heard interesting good things about them.
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Originally Posted by mazda/nissan
(Post 358469)
I think while browsing through FM's 700 some-odd (probably more now) pictures they have in their album, I saw a few of a car with what looked to be a large chunk of foam that was carved hollow with holes cut into it for air flow placed over the filter, and that it did a great deal in quieting the intake.....At least I think it was in FM's photos...
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Originally Posted by patsmx5
(Post 358467)
Side note- I keep looking on google for info on how to make an intake quiet, and all I'm getting is "how do I make my intake louder"....
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Hang in there Pat. I like my intake and BOV quiet too. I might even go to a *gasp* recirculating setup.
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