Best cheapo recirc BOV?
#2
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i used a 2g dsm bov before i got my loud gfb one, worked fine. A 1g dsm bov is better for higher boost levels since it's metal but has a unique flange and costs a lot more. No esperience with the bosch ones but i think the cheaper ones are problematic
i still have my 2g one for cheap if you're interested
i still have my 2g one for cheap if you're interested
#3
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Just about any OEM BOV off a car that came stock with a turbo will work fine. Volvo, Saab, DSM, EVO, Subaru, whatever. They are designed to be quiet and all will recirc.
Here's a few on eBay that will work just fine:
http://cgi.ebay.com/ebaymotors/Used-...spagenameZWDVW
http://cgi.ebay.com/ebaymotors/Bosch...spagenameZWDVW
http://cgi.ebay.com/ebaymotors/Volvo...spagenameZWDVW
http://cgi.ebay.com/ebaymotors/Subar...spagenameZWDVW
http://cgi.ebay.com/ebaymotors/DSM-s...spagenameZWDVW
Here's a few on eBay that will work just fine:
http://cgi.ebay.com/ebaymotors/Used-...spagenameZWDVW
http://cgi.ebay.com/ebaymotors/Bosch...spagenameZWDVW
http://cgi.ebay.com/ebaymotors/Volvo...spagenameZWDVW
http://cgi.ebay.com/ebaymotors/Subar...spagenameZWDVW
http://cgi.ebay.com/ebaymotors/DSM-s...spagenameZWDVW
#4
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I'm using the bosch (whatever the best made one is) at 7psi. It's VTA right now, I'm going to add a filter. I was surprised how loud it was. No problem hearing from the driver's seat with a hard top on and windows down. It doesn't sound bad though. Not obnoxious in the least bit, but there's not mistaking that the car is turbocharged. - rob
#6
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I'm using the bosch (whatever the best made one is) at 7psi. It's VTA right now, I'm going to add a filter. I was surprised how loud it was. No problem hearing from the driver's seat with a hard top on and windows down. It doesn't sound bad though. Not obnoxious in the least bit, but there's not mistaking that the car is turbocharged. - rob
I'm no expert, but wouldn't a large part of the noise come from the VTA? And mightn't a recirc'ing BOV be even worse since they didn't care when designing it?
Cheers, Jon
#10
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OEM BOV's (Bosch, etc...) are designed to be quiet, so you don't hear them. They also recirc into an enclosed space (the intake) to further reduce the noise.
#12
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
I believe it's exactly the opposite. Most VTA BOV's, like Greddy, turboXS, etc... are specifically designed to make noise, some might say "designer noise", that's why some of them are 6" long. They're practically a musical instrument. The are engineered for that high-pitched blast of air, Fast&Furious style so you know they have a big turbo (and a small ****).
OEM BOV's (Bosch, etc...) are designed to be quiet, so you don't hear them. They also recirc into an enclosed space (the intake) to further reduce the noise.
OEM BOV's (Bosch, etc...) are designed to be quiet, so you don't hear them. They also recirc into an enclosed space (the intake) to further reduce the noise.
Actually, we're arguing the same point. He said he was using the Bosch recirc but venting to atmosphere. Probably no difference in decibels though--just pitch!
![eek5](https://www.miataturbo.net/images/smilies/eek5.gif)
Cheers, Jon
#14
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
http://cgi.ebay.com/ebaymotors/Ford-...spagenameZWDVW
The housing is directional. It has a slight tapper to it so if/when you install it put the wider end towards the intake. This creates a slight pressure differential in the tube and helps hold the valve shut. You can use it as a blow-off if you don't have a MAF or use it as a bypass valve. I did a MAP conversion on my DIY turbo and I'm using this valve as a blow-off. The sound is smooth and higher in tone lacking any wistle or squeel. Just a "shhhhhh".
$.02
-LAZ
The housing is directional. It has a slight tapper to it so if/when you install it put the wider end towards the intake. This creates a slight pressure differential in the tube and helps hold the valve shut. You can use it as a blow-off if you don't have a MAF or use it as a bypass valve. I did a MAP conversion on my DIY turbo and I'm using this valve as a blow-off. The sound is smooth and higher in tone lacking any wistle or squeel. Just a "shhhhhh".
$.02
-LAZ
#16
Boost Czar
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![Default](https://www.miataturbo.net/images/icons/icon1.gif)
http://cgi.ebay.com/ebaymotors/Ford-...spagenameZWDVW
The housing is directional. It has a slight tapper to it so if/when you install it put the wider end towards the intake. This creates a slight pressure differential in the tube and helps hold the valve shut. You can use it as a blow-off if you don't have a MAF or use it as a bypass valve. I did a MAP conversion on my DIY turbo and I'm using this valve as a blow-off. The sound is smooth and higher in tone lacking any wistle or squeel. Just a "shhhhhh".
$.02
-LAZ
The housing is directional. It has a slight tapper to it so if/when you install it put the wider end towards the intake. This creates a slight pressure differential in the tube and helps hold the valve shut. You can use it as a blow-off if you don't have a MAF or use it as a bypass valve. I did a MAP conversion on my DIY turbo and I'm using this valve as a blow-off. The sound is smooth and higher in tone lacking any wistle or squeel. Just a "shhhhhh".
$.02
-LAZ
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