710N DV Install (Reverse) - Pics and Tips

[a4darkness]

You bet. Glad it worked well for ya.

However, bad news... this is how it starts. In a few months you'll be taking your car apart. Yessir.

[non_quattro02]

Great writeup and great timing as well! I got a 710N sitting at home for almost a month now. Haven't gotten around to changing it. I thought only the metal DV's were suppose to be installed in reverse so I was going to install it in the normal direction. I'll be doing it in reverse after reading this post.

[a4darkness]

The 710N (as well as others) are a diaphragm style DV while most metal ones are piston... although there's examples of both for either. Regardless, reverse is fine for either style. Further info here.

Good luck.

[M-Hood]

Funny part is that Audi installed the stock Bosch valve in both ways, didn't really matter at stock boost levels. You can find them done that way on both the B5/B6 from the factor.

Not a wise idea to run the valve where it is installed with the boost routed to the bottom part of the Bosch valves when running more then stock boost levels.
It just causes too much stress on the rubber diaphram. When installed this way the boost pushes on the outer part of the diaphram while the pressure from the vac line pushes on the center part where the spring is located. This along with the high IAT's cause the rubber diphram to rip. This info is about as old as the A4 itself. lol

[EBG 18T]

I have no issue running the 710N in the regular direction. It holds 29psi with out an issue. The additional stress as Mike H mentioned was my concern for those reversing a rubber diaphramed DV.

[windsorblue]

So the consensus is that all piston-type DVs should be installed in the reverse position?

[M-Hood]

So the consensus is that all piston-type DVs should be installed in the reverse position?

Yes if compared to how a diaphram type piston gets installed.

[Tone-Dogg]

Noti,

Nice write up, I like how you almost always add a picture break in your DIY write ups. food, longboard, etc. ROFL... nice job

[EBG 18T]

Well i swapped my Dv to the reverse direction last week for shits & giggles. As of last night it is now torn. 29psi and backwards don't work well. It was fine till i flipped it. :damnit:

[M-Hood]

Well I guess it was more shits then giggles now wasn't it?

[a4darkness]

Noti, Nice write up, I like how you almost always add a picture break in your DIY write ups. food, longboard, etc. ROFL... nice job

LOL, guess it is becoming a mainstay isn't it?

Well i swapped my Dv to the reverse direction last week for shits & giggles. As of last night it is now torn. 29psi and backwards don't work well. It was fine till i flipped it. :damnit:

Which one was it?? Guess we finally found a threshold.

[EBG 18T]

Which one was it?? Guess we finally found a threshold.

I had the Bosch Motorsports diaphram DV (RS6?). Is was designed to hold a little more than the regular 710N, but apparently not in the reverse direction. I have gone back to my Hyperboost Piston DV as it holds solid at 26+psi.

Well I guess it was more shits then giggles now wasn't it?

Yep. it took a shit now. I felt obligated to give it a try, even know i was against it. Kinda sucks cause the Dv worked excellent in the normal direction. It was smoother than my Hyperboost valve, but i really don't want to buy another one since i have a couple of new Hyperboost Dv's on the shelf.

[a4darkness]

No kidding, so it was the Bosch and not the 710N or P (for some reason thought you were running one of those). Figured the Bosh wouldn't have had issues, especially since MTM used to hold it lovingly and write songs about it.
Well then, looks like it's a safe bet that the OEM / Bosch DVs' will function fine in reverse but only appropriate for lower boost applications. Anything BT + reverse = piston style. Glad we finally have an answer... and I'll be picking up an AWE, Strat or Baileys when I finally graduate from Stage 1-slowish. Or just a Bosch 110 in the standard direction. ;-)

As always, great info Eric.

[EBG 18T]

i will try to get the part number for you, but it didn't match with any of the standard Audi p/n's. It was in a Bosch Motorsports box with a different part #, but i wonder if it is the same as the 110 or RS6 P version even know the numbers don't correspond.

[a4darkness]

Appreciate it, but I've already got it. ;-)

Bosch 110 Sport Valve (not the same as a 710N, A, P which were used by Audi)
0280142110

710N (used by Audi)
Bosch#: 0280142114
Audi #: 06A145710N (current) 034145710N (previous)

710A (old, used by Audi)
Bosch #:0280142108
Audi #: 034145710B (current) 034145710A (previous)

710P (old, used by Audi)
06A145710P

I knew about the 110 but never realized it was not actually used on Audi's (but rather only on Saab's and Porsche's). A few months ago, MikTip pointed me here which cleared it up...
http://www.hoppenmotorsport.com/BoschBypass.htm

EDIT: The "P" version was run in the RS6 but contrary to popular opinion is designed for a lower boost application, although it does have nice brass innards.

[M-Hood]

Yeah I ran the 110 way back in 2000-2001. When people first started selling them they would grind the numbers off them. I pushed that 110 pretty hard with the K03. Took it out and by mistake put it in backwards into pauls(socaleuro paul) 2001 car, it didn't last but a day or 2.

[Jer]

Anyone interested in doing this I just posted a brand new 710D for sale in the classifieds here. Not trying to spam I just figured someone interested in this thread might like the heads up.

[JAG2694]

Im looking into doing this as soon as i can, but i was just wondering if anybody had any problems after it was done?

[Tone-Dogg]

Im looking into doing this as soon as i can, but i was just wondering if anybody had any problems after it was done?

No problems, been running it REV for about 2 years, 30K

[JAG2694]

Thanks man, i'll prob end up doing it later this week.

[boostedAvant]

I wonder if I should try flipping my splitr around. Might be worth a shot if its slow at work like it has been. Nice write up as always Noti. And where the hell is my 'dilla?

Sent from my LG-US670 using Tapatalk

[JAG2694]

went to do the mod last week and my factory dv had a busted vacuum hose nipple...anyway i did the mod/repair and it made a huge difference, more noticeable boost and throttle response, it was also pretty easy

[a4darkness]

Adding this here as it's related, just swapped out my 710N for a Samco sport and started having an interesting related convo with diagnosticator about standard vs reversed and / or diaphragm vs piston. If anyone makes it this far, the following might be of interest. Starts here:

http://www.audizine.com/forum/showth...=1#post6883091

[andrew.k]

I did this last night with the 710N TT 225hp DV, ordered it from ECS ground, they have a great sale on it right now.
Those one time clamps are horrible to work with; I used a dremel as well to cut them off, but someone (one of my friends borrowed my kit) and lost the cutting wheel, so I had to drill through it, super annoying.
I installed it in the reverse fashion, and so far so good, no more fluttering or hooting owl when I start the car.

Thanks for the write up, and thumbs up to ECS for shipping everything so simply and promptly to Toronto.

[jubei4769]

i know this is an old thread, but i ordered a forge 007 so from what i read it would be ok to install this in the reverse way also?

[diagnosticator]

i know this is an old thread, but i ordered a forge 007 so from what i read it would be ok to install this in the reverse way also?

Because the pressure ballances in the DV when closed and opening are very similar with regards to the moving parts inside, the same applies to both types of DV. IIRC, the forge 007 is a diaphragm type DV, so yes, it should be installed in the "reversed" flow direction.

[EErie B6]

YRIC: Forge 007 is a piston type, not diaphragm.

But yes, same rules still apply. Charge pressure in the bottom, TIP connection to the side.

[jubei4769]

YRIC: Forge 007 is a piston type, not diaphragm.

But yes, same rules still apply. Charge pressure in the bottom, TIP connection to the side.

ok just making sure i read it right, one of these days gotta find the time to do 80k service, timing belt/water pump, dv

[diagnosticator]

YRIC: Forge 007 is a piston type, not diaphragm.But yes, same rules still apply. Charge pressure in the bottom, TIP connection to the side.

Thanks for the correction here!

[diagnosticator]

Well i swapped my Dv to the reverse direction last week for shits & giggles. As of last night it is now torn. 29psi and backwards don't work well. It was fine till i flipped it. :damnit:

Yeah, the 710N diaphragm can fail this way from being reversed. This is also why the 710P version is better since it has a fabric reinforced silicone diaphragm, and is stronger than the Buna N diaphragm in the 710N. Also, Buna N synthetic rubber, heat ages and gets stiff after awhile. No doubt this is why your N DV failed right after swapping the flow direction.

[diagnosticator]

I had the Bosch Motorsports diaphram DV (RS6?). Is was designed to hold a little more than the regular 710N, but apparently not in the reverse direction. I have gone back to my Hyperboost Piston DV as it holds solid at 26+psi.



Yep. it took a shit now. I felt obligated to give it a try, even know i was against it. Kinda sucks cause the Dv worked excellent in the normal direction. It was smoother than my Hyperboost valve, but i really don't want to buy another one since i have a couple of new Hyperboost Dv's on the shelf.

.

do you remember the PN on the Bosch MS DV that you reversed?

[EBG 18T]

.

do you remember the PN on the Bosch MS DV that you reversed?

Unfortunately not. Sorry.

The seals in my hyper boost failed again, So I am now using at Synapse DV. Seems to be holding up quite well.

[a4darkness]

do you remember the PN on the Bosch MS DV that you reversed?

Bosch 110 Sport Valve (not the same as a 710N, A, P which were used by Audi)
0280142110

710N (current, used by Audi)
Bosch#: 0280142114
Audi #: 06A145710N (current) 034145710N (previous)

710A (old, used by Audi)
Bosch #:0280142108
Audi #: 034145710B (current) 034145710A (previous)

710P (old, used by Audi - RS6)
06A145710P

The seals in my hyper boost failed again, So I am now using at Synapse DV. Seems to be holding up quite well.

If my Mitsu Evo DV ever kicks the bucket I'll be looking at those as well, really cool design. But the Evo DV has been incredible thus far so I'll be hard pressed to make the switch.

[daverdfw]

I did this last weekend to go with my Stage 1, i too am noticing a bit more "noise" under acceleration, kinda of a woosh/rushing air noise, doesnt seem to affect the performance, this is also the new brand (keyser) not Bosch, not sure if this one is any stronger than the Bosch? How do you know when you blow a DV? any codes?

[brooklynA42004]

is there room to change the DV Valve without removing anything?

[customa4]

Yes

[Tone-Dogg]

I changed mine from underneath. Seemed easier iirc, that was 10 years ago. Probably should put a new one in there.

Sent from my Samsung Note 4

[brooklynA42004]

can i get to this from the top by removing the headlight? not sure how far down the DV is.

[customa4]

Get some ramps and go in from the bottom.

[RallyeBourne]

Hell, park the passenger wheel on a curb and go in from below.