710N's- NO Blow Off!?!?!

[dennisS4]

I recently installed two brand new 710N's and i hear no boost blow off ot all now. I hear the spool up but no blow off at all like im used to with the stock
valves. I'm Giac chipped and have a Darintake modded air box.

I don't really care either way if I hear it blow off at all but should I?

[chris.mcneal]

You won't hear blow off with functioning 710n's... you were hearing a cool blow off sound with your stock ones because they were probably torn. I had the exact same scenario when I upgraded my valves.

[Das General]

It is a recirculating system, not vented. You won't hear any noise unless you DV is leaking.

[Jayco88]

i always hear a high pitch air release with my 710n's.

[Dr. Jekyll]

i always hear a high pitch air release with my 710n's.

You shouldn't.


You can hear a little bit of a blowoff sound if you have an cold air intake with an open element (not an airbox). But even then you can only hear it with windows up and at very low boost (so the exhaust and road noise is low).

In other words... your DV's are probably broken.

[washyourrhands]

no man ive heard this from multiple people along with myself i hear a smal little CSHH for like a quarter of a second only in high rpms ever since i installed the 710s

[speedydragon]

you'd hear it if you had some open filter set up

[SourDieselS4]

my 710N's were fine for a year or so, then started leaking and making the pssst noise when i shifted under hard acceleration. Replaced them with other rebuildable DVs and the sound it gone

IMO 710n's are over rated, id rather spend the money on a better valve the first time than blow through the stockers, then the 710n's

[Klum00]

ok so here's another question...

a buddy and i got into a disagreement about this last night when I was replacing my EGT sensor. which direction are you guys running your 710N's? When i replaced mine i'm fairly certain i put them back in just as the stock ones had been sitting. This means the small vacuum hose is facing to the side, each towards the throttle body.

He was saying that on his bailys the small vacuum tube faces up towards the hood. we found a few pictures online with DV's going each way. It looks like the aftermarket ones are facing up but most of the stock looking (710N's) are facing to the side.

How are you guys running yours?

[highPSI-S4]

My bailey's are facing up. but they work both ways, as ROB has baily's also and they are mounted with the vaccum tube to the side.

Not sure about 710's

[AudiSportB5S4]

ok so here's another question...

a buddy and i got into a disagreement about this last night when I was replacing my EGT sensor. which direction are you guys running your 710N's? When i replaced mine i'm fairly certain i put them back in just as the stock ones had been sitting. This means the small vacuum hose is facing to the side, each towards the throttle body.

He was saying that on his bailys the small vacuum tube faces up towards the hood. we found a few pictures online with DV's going each way. It looks like the aftermarket ones are facing up but most of the stock looking (710N's) are facing to the side.

How are you guys running yours?

some people think that it makes more "noise" if they are reversed lol, at first when I was new on the boards i installed my hyperboost valves with the vacuum going up everyone was like they are backwards! then others told me facing eachother is wrong as well! then i was like ok WTF?! so i called Stratmosphere who sells the hyperboost they said facing eachother is correct, at least for their valve. they said otherwise the air is pushing the wrong way on the piston and thats not what you want. for 710ns i would install them factory oreintation.

[Slow4]

I have my 710ns top-end facing each other...

[Evilevo]

Damn, you all have me confused. I am gonna check my DVs when i get off work.


SOOOO to clarify, The way the piston moves, should not be up and down, the piston in the DV should move so that air that is being pushed through it goes out where there Piston goes up and down.


Posting this, than going to go draw something up in Paint :D

[AudiSportB5S4]

I have my 710ns top-end facing each other...

here's how mine are... this way is CORRECT according to the makers of the valve, Hyperboost from Stratmosphere

[dennisS4]

I have my 710's in pointed towards the throttle body. I figured just replace them the same way the stock ones were in.

I want to replace them with baileys after some other mods and when I have 300 to drop on a pair...

[Evilevo]

here's how mine are... this way is CORRECT according to the makers of the valve, Hyperboost from Stratmosphere

Well than, previous owner fucked something else up.......


:walks away to go change DVs:

[Myallroad]

On the 710n, yes you wont hear any blow off, but with chip and intake, you will actually hear it a little bit with the recirculation. My 2.7 710ns are loud as hell if you let off at a certain rpm. it actually sounds like your car is sucking in and not blowing off.

[Evilevo]

OKKKKK, now APR shows the Baileys the other way on their install page.

[VR4-S4]

I have baileys and they are to the side. Same way as stock and the only way that makes sense. Doing it the other way will leak.

[Evilevo]

I have baileys and they are to the side. Same way as stock and the only way that makes sense. Doing it the other way will leak.

It makes sense when i think about it, But than why does APR have it shown the wrong way on their website?

As i posted before


:walks away to go change DVs:

[FrimmelNoJerz]

here's how mine are... this way is CORRECT according to the makers of the valve, Hyperboost from Stratmosphere

i recall a previous argument about this exact picture and the position of the DVs. yes, its wrong, but i assume thats where stratmosphere gets the "early torque" option from.

[VR4-S4]

good question

[dennisS4]

i recall a previous argument about this exact picture and the position of the DVs. yes, its wrong, but i assume thats where stratmosphere gets the "early torque" option from.

That makes sense to me. I believe the right way has to be the top facing the TB though.

[AudiSportB5S4]

ah flip a coin and install it that way lol. no but it does make sense if you think about it and look into the valve itself, idk why APR has them that way, maybe the construction of those are different or the guy just made a mistake

people who are talking about the "sucking in air" noise, that willll happen also if you've done the darintake mod. I hear it with my darintaked RS4 airbox but only at low rpms.

[Evilevo]

Any Vendors of DVs care to chime in?

[VR4-S4]

Stick your finger against the valve (the hole opposite the vacuum nipple)...if you can push it in you dont want to have that on the charge side.

[Evilevo]

ah flip a coin and install it that way lol. no but it does make sense if you think about it and look into the valve itself, idk why APR has them that way, maybe the construction of those are different or the guy just made a mistake

people who are talking about the "sucking in air" noise, that willll happen also if you've done the darintake mod. I hear it with my darintaked RS4 airbox but only at low rpms.

No, all Piston Type DVs are the same. The vacuum nipple goes above the Piston in the DV.

I am so confused about what is right that i have forgot which way the DV was on my Evo!!!!

[AudiSportB5S4]

i recall a previous argument about this exact picture and the position of the DVs. yes, its wrong, but i assume thats where stratmosphere gets the "early torque" option from.

i sent this exact picture to stratmosphere they said keep them this way so thats what im doing lol. it is quite torquey, id say +100wtq the way i have them.

[Evilevo]

Stick your finger against the valve (the hole opposite the vacuum nipple)...if you can push it in you dont want to have that on the charge side.

That is my reasoning in believing that the set up on APRs picture is wrong, But how could APR, a huge company. Get that wrong

[VR4-S4]

That is my reasoning in believing that the set up on APRs picture is wrong, But how could APR, a huge company. Get that wrong

Everyone makes mcSteaks

[highPSI-S4]

The local shop i took my car 2 told me my DV's were in wrong, with the top facing each other. Then i changed them and posted this on the board and was told, they can be mounted both ways as far as the bailey's are concerned.

I've had my baily's mounted like the APR pic for 3+ years now as I was told that is the correct way, but mounting them the other way will not hurt and they will work the same.

[AudiSportB5S4]

Everyone makes mcSteaks

lol.

so are MINE in backwards or not? now im in with the confused group. I should have never posted that picture!

[Evilevo]

I just looked at the way the DV was on my Evo and everyother Evo. including the stock DV. and the charged air does indeed push against the piston.

SOOO, from that, the APR picture is showing the correct position of the Baileys

[Klum00]

this is retarded!!!!

haha, looks like APR has them mounted up, but AWE has them mounted inwards. I'm gonna keep mine how the factory ones were, with the small vacuum nipple facing inwards towards the TB.

[highPSI-S4]

I just looked at the way the DV was on my Evo and everyother Evo. including the stock DV. and the charged air does indeed push against the piston.

SOOO, from that, the APR picture is showing the correct position of the Baileys

Here's a link to AWE install instructions. Different from APR


http://www.awe-tuning.com/media/pdf/...A6_allroad.pdf

[Evilevo]

Here's a link to AWE install instructions. Different from APR


http://www.awe-tuning.com/media/pdf/...A6_allroad.pdf

OK Lets just come to the conclusion that the DVs will work EITHER way


On another note, i am going to turn my DVs like the way shown by AWE to see if it runs differently

[AudiSportB5S4]

OK Lets just come to the conclusion that the DVs will work EITHER way


On another note, i am going to turn my DVs like the way shown by AWE to see if it runs differently

throw it on the butt dyno for us.

[Evilevo]

throw it on the butt dyno for us.

Ehh, wont matter. Car isnt running right anyway. Im hoping this fixes it

Gotta make an intake too, I think my intake sitting right on the MAF isnt helping either

[Jung]

It doesnt matter which way the DVs are, they're going to work the same, for Forge or anyone with a piston like that anyways. I was at Audi a while back, the tech tells me, "your DVs were on backwards, but they still work, do you want us to change them so they're good?"... Asshats...

[ThirdStrike]

OK Lets just come to the conclusion that the DVs will work EITHER way


On another note, i am going to turn my DVs like the way shown by AWE to see if it runs differently

this is correct. your valve piston can be pushed from the bottom by boost (which makes it louder) or pushed from the top by boost (the recommended way of installing)
either way it doesnt matter.

p.s. off topic; i have shims in my valves for faster boost response/tighter spring. you guys should try it.