Supercharged/Turbocharged The increase in air/fuel pressure above atmospheric pressure in the intake system caused by the action of a supercharger or turbocharger attached to an engine.

BOV, whats good for SC?

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Old Nov 21, 2007 | 08:16 AM
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BOV, whats good for SC?

Well the time has come for me to get a real BOV. I want one that will be safe, meaning no compressor surge. I did some searching and lots of reading and I’m still a bit confused. I’m on a 9lb pulley, and I want something that will sound nice.

I looked at the Tial BOV but read on here that this was not recommended for low boost will this be ok for my 9lb of boost? I will up the boost to 12lbs in the future. Is this the BOV for me?

My friend has a Turbo XS BOV on his SC maxima but he’s running 6lbs of boost only, would this BOV be ok for my setup?

Another friend with a SC maxima has the blitz BOV and says it’s the best.

Someone recommended a turbo smart BOV but that’s like $280.

I’m not trying to break the bank here either. I would like to keep things affordable. So all you SC guys what BOV would you recommend?
Old Nov 21, 2007 | 09:18 AM
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Some people like Y2KevSE used a Blitz BOV. Seems to be popular with superchargers. However, I don't really reccomend a BOV made for turbo setups, since even at idle, your SC blower will still be spinning unlike turbo.
Old Nov 21, 2007 | 10:28 AM
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Originally Posted by MaxBoost925
Some people like Y2KevSE used a Blitz BOV. Seems to be popular with superchargers. However, I don't really reccomend a BOV made for turbo setups, since even at idle, your SC blower will still be spinning unlike turbo.
100% correct this is why im confused in kinda leaning towards a turbo xs BOV but the flange setup is soo small (type H flange)
Old Nov 21, 2007 | 10:46 AM
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Originally Posted by secondtonone317
100% correct this is why im confused in kinda leaning towards a turbo xs BOV but the flange setup is soo small (type H flange)
Try to find a Blitz, otherwise get a replacement Bosh bypass.
Old Nov 21, 2007 | 11:07 AM
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HKS SSQV great bov. Now one question, do you need a bov or a recirculating valve. If your valve is before the maf then yes you can run a bov with no ill effects but if it is in fact after the maf then you may run into stall isuses. I am running a greddy rs and it is great for low boost. Also your s/c is spinng but yu arent making enough boost at idle to worry about.
Old Nov 21, 2007 | 01:11 PM
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Originally Posted by kzoosho
HKS SSQV great bov.
Sure, for a turbo application. For SC, no way.
Old Nov 21, 2007 | 01:28 PM
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Originally Posted by The Wizard
Sure, for a turbo application. For SC, no way.
Please explain? I know several S/C setups here running the ssqv.
Old Nov 21, 2007 | 03:35 PM
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The HKS SSQV never opens at idle. Its design doesn't allow for it at all. Which is great for turbo, but bad for SC.

The vortech BOVs are already set up for SC and the TiAl BOV can flow a lot of air, but they tend to be big and expensive.
Old Nov 21, 2007 | 03:39 PM
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Originally Posted by SPiG
The HKS SSQV never opens at idle. Its design doesn't allow for it at all. Which is great for turbo, but bad for SC.

The vortech BOVs are already set up for SC and the TiAl BOV can flow a lot of air, but they tend to be big and expensive.
Ok i understand that but like i said i know of 2 cars here in town running a ssqv
on s/c setups. that was all i was saying. By design they are made not to open under boost but they will open to vent. they close once it makes boost as its a pull type.
Old Nov 21, 2007 | 07:38 PM
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I have a decent vortech unit for sale.
Old Nov 21, 2007 | 08:00 PM
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i have a blitz bov that stillen supplied with the kit and it doesn't leak air at idle. should it be leaking or is it not designed to if it is how do i fix it

Last edited by brasso; Nov 21, 2007 at 08:03 PM.
Old Nov 21, 2007 | 11:23 PM
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Originally Posted by kzoosho
Ok i understand that but like i said i know of 2 cars here in town running a ssqv
on s/c setups. that was all i was saying. By design they are made not to open under boost but they will open to vent. they close once it makes boost as its a pull type.
Then they have a bad setup then?

I have an SSQV, but it's for turbo. I suggest a Vortech Mondo or a Blitz.
Old Nov 21, 2007 | 11:25 PM
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Originally Posted by MaxBoost925
Then they have a bad setup then?

I have an SSQV, but it's for turbo. I suggest a Vortech Mondo or a Blitz.
Hmmmmmm a bad setup? if you say so. I know one is a 700hp m5 with a vortech
Old Nov 22, 2007 | 12:06 AM
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Originally Posted by kzoosho
HKS SSQV great bov. Now one question, do you need a bov or a recirculating valve. If your valve is before the maf then yes you can run a bov with no ill effects but if it is in fact after the maf then you may run into stall isuses. I am running a greddy rs and it is great for low boost. Also your s/c is spinng but yu arent making enough boost at idle to worry about.
Im redoing the piping with a z32 maf after the BOV so i want that nice BOV sound
Old Nov 22, 2007 | 01:24 AM
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almost all BOV's are designed for intended use on a turbocharger. your best bet is a vortech, if not, you can use Tial 50mm since its made for turbo and sc aplications. get the 7 psi spring from www.streetunit.com i got mine there and no problems. moves plenty of air and sounds niceee
Old Nov 22, 2007 | 07:34 AM
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Originally Posted by VIP Maxima
almost all BOV's are designed for intended use on a turbocharger. your best bet is a vortech, if not, you can use Tial 50mm since its made for turbo and sc aplications. get the 7 psi spring from www.streetunit.com i got mine there and no problems. moves plenty of air and sounds niceee
i have the same and agree on the 7psi spring. i recenlty put in an 11psi spring to try and match what Tial's vacuum application calls for and it would not vent at idle.
Old Nov 22, 2007 | 08:28 AM
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Originally Posted by Ephraim
i have the same and agree on the 7psi spring. i recenlty put in an 11psi spring to try and match what Tial's vacuum application calls for and it would not vent at idle.
Ive been saying this for a while. Im actually getting tired of the Tial. I get surge at certian RPMs when cruisng. It will go away if I let off the gas or give it more, its driving me nuts. Yeah the Tial sounds ok, but sound isnt really my top concern and is not why I would choose a BOV.
Last I spoke to Stephen Max, he told he too had a bit of surge with the Mondo but it went completly away when he did the FMIC.
Anyone else have surge with there Mondos and if not what PSI are you at?

Last edited by Flava_24/7; Nov 22, 2007 at 08:31 AM.
Old Nov 22, 2007 | 08:35 AM
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Originally Posted by brasso
i have a blitz bov that stillen supplied with the kit and it doesn't leak air at idle. should it be leaking or is it not designed to if it is how do i fix it
Adjust the center screw, it should vent at idle, mine did.
Old Nov 22, 2007 | 08:39 AM
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I have the HKS SSQV right now. Sounds ok but I think im gonna get a tial. THe HKS sounds too much like one of those fake Turbo/SC Simulators lol
Old Nov 22, 2007 | 09:55 AM
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Originally Posted by wirelessdude04
I have the HKS SSQV right now. Sounds ok but I think im gonna get a tial. THe HKS sounds too much like one of those fake Turbo/SC Simulators lol
When you are looking to sell pm me i will take it off your hands.
Old Nov 22, 2007 | 11:20 AM
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the SSQV is a very nice sounding BOV. my buddy has it on his STI but man its just wayyyyy too loud. you can hear it from a quarter mile away with a normal 3k rpm shift.
Old Nov 22, 2007 | 11:36 AM
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I want it. I am running a greddy rs. but i am thinking about getting the ssqv.
Old Nov 22, 2007 | 12:40 PM
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Originally Posted by VIP Maxima
the SSQV is a very nice sounding BOV. my buddy has it on his STI but man its just wayyyyy too loud. you can hear it from a quarter mile away with a normal 3k rpm shift.

I loved it when I had it. When I shifted above 3k rpm, everyone around me would just stare at the car LOL. They're like "WTF, is that a boosted Maxima?!?"

Bishnu, I would say go with either the Blitz, the Mondo or the TiAL.
Old Nov 22, 2007 | 12:58 PM
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Originally Posted by QnzMax
I loved it when I had it. When I shifted above 3k rpm, everyone around me would just stare at the car LOL. They're like "WTF, is that a boosted Maxima?!?"
the tial is similar but not as loud and not whisling, it sounds a lot like hydraulics releasing air, LOL ! i know what you mean about people being amazed. while walkin on campus some random kid i dont even know comes to me and goes "hey so you got a turbo ??" im like whattt ?????? hes like, dont you drive that gray maxima, im like oh ya, its supercharged. then he goes, "oh about time you do that"

stalkers you dont even know keep track of our mods list better than we do, LOL.
Old Nov 22, 2007 | 01:33 PM
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I love the sound of the ssqv. My rs sounds sweet but just not loud.
Old Nov 22, 2007 | 02:47 PM
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Originally Posted by kzoosho
When you are looking to sell pm me i will take it off your hands.


Probably in the middle of december. But ill let you know when I sell it
Old Nov 22, 2007 | 07:08 PM
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Originally Posted by wirelessdude04
Probably in the middle of december. But ill let you know when I sell it
Will do.
Old Nov 22, 2007 | 11:11 PM
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Originally Posted by kzoosho
I love the sound of the ssqv. My rs sounds sweet but just not loud.
Yes, the SSQV blows off nicely on a turbo setup, but don't expect it to sound the same with a SC. I personally had it for two weeks, and it didn't blow off at all, sound wise. Only once in a while would it make a sound, and that was when it was freezing cold out. I do have the SSQV on my 93.5 twin turbo Supra, and it blows off nicely and functions like it should.

Performance wise, the SSQV sucked too. Didn't vent at idle, causing gurgling sounds in the charge pipe (compressor surge) and caused my car to stall as I approached a stop. Lame.

Function>fashion (sound)
Old Nov 23, 2007 | 09:08 AM
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Originally Posted by The Wizard
Yes, the SSQV blows off nicely on a turbo setup, but don't expect it to sound the same with a SC. I personally had it for two weeks, and it didn't blow off at all, sound wise. Only once in a while would it make a sound, and that was when it was freezing cold out. I do have the SSQV on my 93.5 twin turbo Supra, and it blows off nicely and functions like it should.

Performance wise, the SSQV sucked too. Didn't vent at idle, causing gurgling sounds in the charge pipe (compressor surge) and caused my car to stall as I approached a stop. Lame.

Function>fashion (sound)
I can fully understand your stand point but at the same time it has been used in both situations super or turbo . i dont know about your situation maybe you got a bad one i dont know. But i do know a ton of guys running them on super setups.
Old Nov 23, 2007 | 09:43 AM
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Originally Posted by kzoosho
I can fully understand your stand point but at the same time it has been used in both situations super or turbo . i dont know about your situation maybe you got a bad one i dont know. But i do know a ton of guys running them on super setups.
He wasnt the only one who had issues,..
http://forums.maxima.org/showpost.ph...60&postcount=3
http://forums.maxima.org/showpost.ph...1&postcount=18

I30tMikeD even contacted HKS about this BOV and they even stated that its not designed to vent at idle and cannot/shouldnt be adjusted to do so.

http://forums.maxima.org/showpost.ph...3&postcount=11


Just because a ton of guys are using it, doesnt mean its the most practical setup. Many choose the sound over function, thats even obvious in this thread.
Old Nov 23, 2007 | 10:22 AM
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But also just because a few have had problems that doesnt mean its bad. Maybe for the Max is not good but to say its not good for a certain setup is just not right. Thats all i am sayin. And wasnt mike turboed?
Old Nov 23, 2007 | 01:54 PM
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Originally Posted by kzoosho
But also just because a few have had problems that doesnt mean its bad. Maybe for the Max is not good but to say its not good for a certain setup is just not right. Thats all i am sayin. And wasnt mike turboed?
Yes he was, he wasnt saying he was having issues. Mike just posted about how that BOV isnt meant to vent at idle.
HKS states that its not designed to vent at idle, so if you know a SC setup that doesnt need to vent at idle then yeah, it can be used for that setup but as far as I know they do. So yeah I would say the SSQV isnt the most ideal BOV for a SC setup. You can believe what you wish, but when the manufacturer states
As long as it's not leaking at idle, your fine
I would believe that its not designed to vent at idle.
In that post, the HKS rep also states
Some vehicles have more vacuum than others. If high enough, it is possible for a vehicle's vacuum at idle to accidentally pull the valve open, causing a vacuum leak.It is for this reason that HKS employees an adjustment nut on the back of the valve to allow the spring tension to be adjusted, ensuring that the valve is closed and not leaking while the vehicle is idling
Old Nov 23, 2007 | 02:11 PM
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Originally Posted by Flava_24/7
Yes he was, he wasnt saying he was having issues. Mike just posted about how that BOV isnt meant to vent at idle.
HKS states that its not designed to vent at idle, so if you know a SC setup that doesnt need to vent at idle then yeah, it can be used for that setup but as far as I know they do. So yeah I would say the SSQV isnt the most ideal BOV for a SC setup. You can believe what you wish, but when the manufacturer states

I would believe that its not designed to vent at idle.
In that post, the HKS rep also states
Ok i agree with you there . No doubt about it.
Old Nov 23, 2007 | 04:37 PM
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Originally Posted by Flava_24/7
He wasnt the only one who had issues,..
http://forums.maxima.org/showpost.ph...60&postcount=3
http://forums.maxima.org/showpost.ph...1&postcount=18

I30tMikeD even contacted HKS about this BOV and they even stated that its not designed to vent at idle and cannot/shouldnt be adjusted to do so.

http://forums.maxima.org/showpost.ph...3&postcount=11


Just because a ton of guys are using it, doesnt mean its the most practical setup. Many choose the sound over function, thats even obvious in this thread.


Additionally, it's more than a few that have had problems with the SSQV on our centrifugal SC's.... Those of us that have been around for 3+ years have read all about it numerous times. FWIW, my unit was bought brand spankin' new from an Authorized HKS dealer and was genuine, not an ebay knockoff. Had I searched the org before buying it, I would have learned about it and not bought it. I based my decision solely on it's great performance on my TT Supra.
Old Nov 24, 2007 | 04:32 AM
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after reading all this stuff.....I think im going to go with the blitz DD
Old Nov 24, 2007 | 05:11 AM
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Yea I even asked my cousin Jeeve about running the HKS on a SC car and he said its really not meant for the SC cars. I just ordered a Tial last night.
Old Nov 24, 2007 | 11:46 AM
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Originally Posted by wirelessdude04
Yea I even asked my cousin Jeeve about running the HKS on a SC car and he said its really not meant for the SC cars. I just ordered a Tial last night.
So ill be getting a pm soon then right?
Old Nov 26, 2007 | 09:32 AM
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blitz is your best bet. Most guys i know running a SC setup are running the Blitz... I mean it doesn't sound that great, but it's made for an SC setup.
Old Nov 26, 2007 | 09:37 AM
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Originally Posted by A33 VQ30DEK
blitz is your best bet. Most guys i know running a SC setup are running the Blitz... I mean it doesn't sound that great, but it's made for an SC setup.
Yea they dont sound all that great but the function is there. Tial for low boost arent great.
Old Nov 26, 2007 | 08:24 PM
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Originally Posted by kzoosho
So ill be getting a pm soon then right?
yup yup as soon as my Tial comes in well make a finish price and everything on the HKS



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