Blow Off Valve VS Diverter Valve

[El_Chapusca]

Do they do the same thing, or are they two complete different types off valves that will serve different purposes

[AudiA4Turbo22]

Both do the same job: release boost pressure. The blow off valve vents the boost from the turbo to the atmosphere, while the DV take it back to the airbox, creating a kind of closed loop system. Some like the "woosh" of the blow off valve, but our cars are design to work with a DV.

[El_Chapusca]

So a blow off valve would work i was thinking HKS SS

[04QuattroTurbo]

Both do the same job: release boost pressure. The blow off valve vents the boost from the turbo to the atmosphere, while the DV take it back to the airbox, creating a kind of closed loop system. Some like the "woosh" of the blow off valve, but our cars are design to work with a DV.

Yeah, but you would get a MIL or CEL with a Blow-off valve right? Since the closed loop will cause a leak? I think unless you are looking to hear that blow-off sound, it is recommended by many here to get a better Diverter Valve than the plastic OEM one rather than using a Blow-off Valve.

[A4ringedONE8T]

HKS SSQ or a Forge 004 are the typical BOV's that will work on MOST MAF'd cars. While there are plenty of 1.8T guys running them without problems, there are certain cars which do not like them, just luck of the draw

[A4ringedONE8T]

Yeah, but you would get a MIL or CEL with a Blow-off valve right? Since the closed loop will cause a leak? I think unless you are looking to hear that blow-off sound, it is recommended by many here to get a better Diverter Valve than the plastic OEM one rather than using a Blow-off Valve.

No, as long as its a BOV that is closed at idle, it should be fine and wont cause any CEL's

[El_Chapusca]

Will the Diverter Valve still give me that "Swooosh" followed by the air release Sound that the hks's and other brand B/V's do ? i just love that sound

[aaaudiprotein]

I run Forge 004 with no problems (knocking on wood), i sold HKS SQV to one of the members and i think he runs it with no problems too.

[aaaudiprotein]

Will the Diverter Valve still give me that "Swooosh" followed by the air release Sound that the hks's and other brand B/V's do ? i just love that sound

Not that loud... some people say Forge 007 in reverse would make that noise, i tried that but nothing happened.

[dirtybrd]

Will the Diverter Valve still give me that "Swooosh" followed by the air release Sound that the hks's and other brand B/V's do ? i just love that sound

With an aftermarket intake, or just a filter on the MAF. But not as loud.

[El_Chapusca]

thanks for all the info the guys selling me one for $90 HKS SS

[A4ringedONE8T]

thanks for all the info the guys selling me one for $90 HKS SS

Its either a POS (broken) or a knock off, they are worth quite a bit more than that, even used

[El_Chapusca]

yea imma check it out first to see if its legit and if just the BOV itself or if it will also come with the components good thing he local and also

[aaaudiprotein]

Is HKS SQV is the same as SS?

[El_Chapusca]

MA bah i meant SQV and btw does anyone know the difficulty level on the installation of this thing? scale from 1-10

[aaaudiprotein]

Oh shnap, i sold one for $50 with 10k miles on it.
Install is easy, it seems difficult if you know nothing about the cars, but it is very easy.

[ProJect_*A4*]

dont forget, you need the recirculation kit, and adapter flange...

http://www.audizine.com/forum/showthread.php?t=227952

POST #9

i suggest you read it.. ^^

[A4Tuuuurbo]

^ was gonna say that..

Also, Do you have any other mods to the engine? With going BOV over Div I would like to see other mods to the engine, or at least chipped.

Majority of the time like Shawn said, you'll be fine.. BUT there are those special cases where if you are closer to stock it will just put u in a world of shit. Might want to go Forged 007 and just reverse it until you get more engine mods, if you don't have that many. Keep in mind your expelling air to atmosphere with BOV, which means your boost pressure can drop between shifts, make sure your compensating for this, hence at least a chip.

[AudiA4Turbo22]

dude 1 piece of advice, i know u wanna hear that epic whistle from our turbo, and i there's nothing wrong with that but save ur $90 and buy a 710N from a TT225 from the dealer for $40, u don't have a BAT or a BT to have the need for a crazy DV or BOV, our cars really don't agree with BOV's, that little bit of air that is recirculated by ur DV really does preserve the turbo, i have APR 1+ and i spike around 21PSI and i've had a 710N DV and it has never failed, and trust me with a cone filter and a sweet heatshield u'll hear a PSHHHHHH instead, nearly as loud as a BOV but much how should i say Classier? form. just my useless $0.02 but just wanna help.

Yo Shawn i got some good news my CEL came back lol!

[A4Tuuuurbo]

^ +1

[demea]

There ya go...
It does both and has adapters to make it either a full BOV or full DV.
I have one waiting to be put on.

http://www.forgemotorsport.com/conte...duct=FMDVSPLTR

[El_Chapusca]

I belive theres different size springs that will go in the diverter valve depending on how much HP the car is pulling but correct me if im wrong.

[A4ringedONE8T]

^ was gonna say that..

Also, Do you have any other mods to the engine? With going BOV over Div I would like to see other mods to the engine, or at least chipped.

Majority of the time like Shawn said, you'll be fine.. BUT there are those special cases where if you are closer to stock it will just put u in a world of shit. Might want to go Forged 007 and just reverse it until you get more engine mods, if you don't have that many. Keep in mind your expelling air to atmosphere with BOV, which means your boost pressure can drop between shifts, make sure your compensating for this, hence at least a chip.

Absolutely, unless you have a reason to be drawing attention to your car (IE a decent amount of power), I would stay clear of the BOV sounds. You'll feel worse when you get whipped by some POS thinking your car is fast because it has a BOV

[demea]

Absolutely, unless you have a reason to be drawing attention to your car (IE a decent amount of power), I would stay clear of the BOV sounds. You'll feel worse when you get whipped by some POS thinking your car is fast because it has a BOV

And that would be pretty much most cars out there

[04QuattroTurbo]

dude 1 piece of advice, i know u wanna hear that epic whistle from our turbo, and i there's nothing wrong with that but save ur $90 and buy a 710N from a TT225 from the dealer for $40, u don't have a BAT or a BT to have the need for a crazy DV or BOV, our cars really don't agree with BOV's, that little bit of air that is recirculated by ur DV really does preserve the turbo, i have APR 1+ and i spike around 21PSI and i've had a 710N DV and it has never failed, and trust me with a cone filter and a sweet heatshield u'll hear a PSHHHHHH instead, nearly as loud as a BOV but much how should i say Classier? form. just my useless $0.02 but just wanna help.

Yo Shawn i got some good news my CEL came back lol!

Wow, Kirk, no exclamation points, I'm proud of you. BTW, no package yet.

Is there a DIY on how to install the 710N?

[BEESIX]

i bought that hks ssqv from audiprotien and im running it fineeeeee, but its too loud for my taste, so i wanna get a greddy type s and recirculate that back into my system kind of like a DV ill post up how that works once i get it

[BEESIX]

oh nd tht hks ssqv was from a wrx, if ur good with your hands wil a little custom fab u can make it work its not hard at all

[102487thedude]

Just so u guys know they both are the exact same thing the only diffrence is if you choose to run a line from the valve back to the inlet before the turbo. the valve itsself is the same.

[A4 KiDD 810]

Both do the same job: release boost pressure. The blow off valve vents the boost from the turbo to the atmosphere, while the DV take it back to the airbox, creating a kind of closed loop system. Some like the "woosh" of the blow off valve, but our cars are design to work with a DV.

Nailed it, but in addition, for those who like the whoosh sound, you can still avoid a BOV, just get a cone intake and you will get the sound from your DV.

[AudiA4Turbo22]

Wow, Kirk, no exclamation points, I'm proud of you. BTW, no package yet.

Is there a DIY on how to install the 710N?

Correction Package received yesterday. working on the exclamations and lolz. uhm well installing a 710N is the same as installing any other DV/BOV, straight forward, if u remove the belly pan while on jack stands and look up the passenger side, u'll see ur stock DV, hard top reach as there is little space to work with, but install it in the exact opposite direction that ur stock one is pointing, good luck with the clamps.

[04QuattroTurbo]

Correction Package received yesterday. working on the exclamations and lolz. uhm well installing a 710N is the same as installing any other DV/BOV, straight forward, if u remove the belly pan while on jack stands and look up the passenger side, u'll see ur stock DV, hard top reach as there is little space to work with, but install it in the exact opposite direction that ur stock one is pointing, good luck with the clamps.

You're right, I got the package a few hours after posting that. Anyway, great job on the exclamations! I read somewhere that some A4's already have the 710N installed. Does anyone have pictures on how the "stock" one differs from the 710N so I can "eyeball" it and see if I already have the 710N?

Clamps? I have a snap ring pliers set, would that make things easy?

[AudiA4Turbo22]

710N:



stock 710A:

[04QuattroTurbo]

That's what I was afraid of they look identical! Where does this thing sit exactly in relation to the engine...I hate getting underneath my car! LOL

[AudiA4Turbo22]

^^it sits in front of the radiator near the air box, or right below the timing belt cover, u can tell the difference, the stock one is much smaller.

[AyFourBeeFive]

Okay, this is a very touchy topic for ANY turbo car owner....BUT to re-ask on this topic.!
I own a Stock 2000 A4 B5, and admire the 'Psss' sound...so I did ALOT of research and it was said by many to go with the Bosch TT 710N and to NOT deal with a True "Blow Off Valve"..My question is can I turn this "Diverter Valve" into a "blow off valve" by simply plugging the turbo hose inlet and having it run to atmosphere without consequence..In other words a common CEL or Rubbish Idle? ANY insight is appreciated as I have the part on order..Thank you!

[aaaudiprotein]

Okay, this is a very touchy topic for ANY turbo car owner....BUT to re-ask on this topic.!
I own a Stock 2000 A4 B5, and admire the 'Psss' sound...so I did ALOT of research and it was said by many to go with the Bosch TT 710N and to NOT deal with a True "Blow Off Valve"..My question is can I turn this "Diverter Valve" into a "blow off valve" by simply plugging the turbo hose inlet and having it run to atmosphere without consequence..In other words a common CEL or Rubbish Idle? ANY insight is appreciated as I have the part on order..Thank you!

DV and BV have the same "design" but do "different" functions.
i used my forge 004 for 6 months with NO problems, yeah car felt a BIT slower though. but my mechanic freaked out when he found out i was using it :)

[JMRQuattro]

Will the Diverter Valve still give me that "Swooosh" followed by the air release Sound that the hks's and other brand B/V's do ? i just love that sound

instead of being loud like what you hear, it will be a lot quieter. I've had friends in reference to the diverter valve say it sounds like my car is breathing. You can hear it but it's not really loud. But if you got a FMIC it would be louder like a BOV while still maintaining the enhanced performance of the DV.

Here you go, GOOGLE:

Technically part of the intake system. A diverter valve redirects turbo backpressure to the intake side of the turbo. This accomplishes two things, 1) does not damage turbo, 2) re-uses boost. A Diverter Valve is not to be confused with a Blow Off Valve or BOV which releases excess boost into the atmosphere while making the famous ‘Fast and the Furious’ “PSSSH” sound. Many say this sound can be somewhat replicated with an aftermarket or custom intake and a good diverter valve.

[AyFourBeeFive]

Okay, I own a 2000 Audi A4 B5 and SIMPLY just want an easy setup. all I'm looking to do is to setup filter to MAF sensor to stock pipe as shown in the picture(with the red car).....I went to unplug my air box and the Air Pump line(on the top of the box) seems permanetley attached ...Can I simply run a small air filter on the air pump,, or how do I go about this>?? ANY info is very much appreciated...Thankyou
(I have a 710n diverter valve I plan on running to atmosphere just to make this thread related)

[teg2audi]

Forge Splitter Valve, then you get the recirculation and blow off depending on the setting. I run a Forge 007, didn't want the blow off sound that loud.

[diagnosticator]

I belive theres different size springs that will go in the diverter valve depending on how much HP the car is pulling but correct me if im wrong.

The HP level has no bearing on the spring rate used, it's only a matter of boost pressure levels, and the installed orientation of the valve, as effects the several pressure related forces on the valve during operation.