Recommend an affordable recirculating BOV?
Thread Starter
Joined: Apr 2008
Posts: 2,023
Total Cats: 19
From: Outside Portland Maine
Recommend an affordable recirculating BOV?
I am currently using a knock-off BOV, and in addition to whistling at part throttle, the diaphram inside has torn. This is the second one I have had and this one only lasted a year.
I have looked at buying the real version of this valve, but they are pretty expensive. I was hoping I wouldn't have to re-weld the flange.
Does anybody have a recommendation for a BOV that would use the same flange, but that is higher quality? I don't mind paying more than that particular knock-off, but $250-$300 for a genuine Greddy is a lot. Is there a higher-quality knock-off or something?
Otherwise, what are other people using for recirculating valves? If I have to change the flange, there must be something decent at a reasonable price. I would like a relatively quiet valve, but it doesn't have to be anything super-stealth.
I have looked at buying the real version of this valve, but they are pretty expensive. I was hoping I wouldn't have to re-weld the flange.
Does anybody have a recommendation for a BOV that would use the same flange, but that is higher quality? I don't mind paying more than that particular knock-off, but $250-$300 for a genuine Greddy is a lot. Is there a higher-quality knock-off or something?
Otherwise, what are other people using for recirculating valves? If I have to change the flange, there must be something decent at a reasonable price. I would like a relatively quiet valve, but it doesn't have to be anything super-stealth.
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The plastic ones tend to leak. I'm happy with my Forge. It is a 007, which seems to have been replaced by the 008:
$167 and re-buildable
Side entrance is high pressure. It can take lots of spring, as the vacuum will pop it open.
$167 and re-buildable
Side entrance is high pressure. It can take lots of spring, as the vacuum will pop it open.
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Junior Member
Joined: Aug 2018
Posts: 98
Total Cats: 9
From: Baton Rouge, LA
I am currently using a knock-off BOV, and in addition to whistling at part throttle, the diaphram inside has torn. This is the second one I have had and this one only lasted a year.
I have looked at buying the real version of this valve, but they are pretty expensive. I was hoping I wouldn't have to re-weld the flange.
Does anybody have a recommendation for a BOV that would use the same flange, but that is higher quality? I don't mind paying more than that particular knock-off, but $250-$300 for a genuine Greddy is a lot. Is there a higher-quality knock-off or something?
Otherwise, what are other people using for recirculating valves? If I have to change the flange, there must be something decent at a reasonable price. I would like a relatively quiet valve, but it doesn't have to be anything super-stealth.
I have looked at buying the real version of this valve, but they are pretty expensive. I was hoping I wouldn't have to re-weld the flange.
Does anybody have a recommendation for a BOV that would use the same flange, but that is higher quality? I don't mind paying more than that particular knock-off, but $250-$300 for a genuine Greddy is a lot. Is there a higher-quality knock-off or something?
Otherwise, what are other people using for recirculating valves? If I have to change the flange, there must be something decent at a reasonable price. I would like a relatively quiet valve, but it doesn't have to be anything super-stealth.
A recirculating TurboSmart has a loud "pssh" (not VTA loud) if you leave the port unplugged. If you attach a length of hose to it, it quiets down a lot. You get the ability to adjust the loudness. That is how I would do it, if I changed my BOV setup.
They have tons of adapter kits, but they are a little pricey for something you can DIY. The TurboSmart Greddy adapter is $36.58 on their website. BOV-TS-Greddy-Flange-Adapter
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I'm using a $28 Bosch black plastic recirculation valve as a BOV. I've been using it at 22psi, 320whp+ including track duty for many years. It doesn't leak and hasn't failed. They only leak if they're plumbed incorrectly. The inlet from the intercooler piping is the port perpendicular to the diaphragm on the Bosch units according to their literature. Most people plumb them to allow the pressure to push the diaphragm open contrary to Bosch's design specs.
$28 is pretty affordable.
$28 is pretty affordable.
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Thread Starter
Joined: Apr 2008
Posts: 2,023
Total Cats: 19
From: Outside Portland Maine
Thanks for all the help guys!
Those Bosch valves are super cheap, and if I can make an adapter I can try that out without spending much. Then if it doesn't work the way I want I can go the $150ish route, where there appear to be a number of good options.
Those Bosch valves are super cheap, and if I can make an adapter I can try that out without spending much. Then if it doesn't work the way I want I can go the $150ish route, where there appear to be a number of good options.
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I'm using a $28 Bosch black plastic recirculation valve as a BOV. I've been using it at 22psi, 320whp+ including track duty for many years. It doesn't leak and hasn't failed. They only leak if they're plumbed incorrectly. The inlet from the intercooler piping is the port perpendicular to the diaphragm on the Bosch units according to their literature. Most people plumb them to allow the pressure to push the diaphragm open contrary to Bosch's design specs.
$28 is pretty affordable.
$28 is pretty affordable.
Can you point to a specific P/N and / or source?
Last edited by DNMakinson; Oct 30, 2018 at 07:52 AM. Reason: Added the question
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Senior Member
Joined: Apr 2016
Posts: 790
Total Cats: 188
From: Atlanta
I started with a knockoff GReddy from silicone intakes. I suspected it was leaking, and replaced it with a real GReddy FV. I picked up 1-2 psi at all RPM. So I'm not a fan of knockoff GReddy BOV's.
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