DIY - Forge Atmosheric Blow Off Valve Install

[TeknoGroover]

VAG 2.0T Fsi Atmospheric dump valve.
Tools required : - Vehicle ramp or Jack and axle stands.
4mm Allen socket, ratchet, extension.

Warning…be careful not to let any foreign body enter the inlet tract of the vehicle whilst the fitting procedure is being carried out. Severe Turbo and/or engine damage may occur if this is not adhered to.

1/ Raise the vehicle and locate the standard electronic recirculation valve located in the underside of the Turbo intake pipe. Remove the electrical connection as per the larger arrow. Then remove the 3x 5mm cap head bolts as per the smaller arrow. The electrical solenoid valve can now be removed.

http://img467.imageshack.us/img467/2851/forge22fu.jpg

2/ Now fit the new atmospheric valve into the aperture left in the turbo by the standard electronic valve. Refit the stock valve over the top of the Forge atmospheric valve and secure using the 3x new m6X35mm cap head bolts.
Refit the electrical connection to the solenoid valve. Remove all tools form the vehicle. You are now ready to use your new Forge Motorsport product.

http://img472.imageshack.us/img472/3597/forge13ap.jpg

Engineered for Performance.
Note, Due to the ECU controlled nature of the standard electronic diverter valve you may experience longer than expected operations of the atmospheric valve under certain operating conditions. This is not a fault in any way, the ECU controls the turbo pressure via the solenoid valve in order to improve driveability and soften the take up of power. In the same way you may also experience non operation of the valve under enthusiastic gear changes, this is also not a fault. It is determined by the ECU that the recirculation is not required at this point due to the rapid re-appliance of the throttle.

FROM FORGEMOTORSPORT.COM

[Scotaku]

Are there any performance gains with this gadget or is it just a noisemaker?

[Brandon]

Just a noise maker from what i can tell.

[GTI2007]

Are there any performance gains with this gadget or is it just a noisemaker?

some guy on an other forum where I regularly come had a gain of 6 HP and 21 lbs-ft after installing this Forge BOV

[Michail]

in Greece however, some others claim that they have had some loss....

I am refering to some posts in www.vwclub.gr

[GTI2007]

With the Forge BOV? Did the guy just let it put in and let changed nothing into the ECU? Cause the guy I speak of has let it install by a chiptuner and propably also let them rewrite the settings in the ECU a little for this BOV

[Scotaku]

I've looked back into this again. I'm having a hard time believing any measurable gains can be had from increasing the gap of the stock boost recirculation valve as this trinket does. When closed, boost levels will be identical unless some of the firmware has been altered as suggested. When open, this gadget will allow excess boost to vent into open air making a cute noise, but little else. Actually, instead of venting back into the turbo as the original design specifies, the lost boost will probably induce the turbo to stall... and require more from the engine to overcome lag.

Yep. Noisemaker.

[black2.0t]

the whole point of a BOV to stop back boost, when you get on the gas and then let off to shift the throttle is closed so the remaining boost inside the intake pipe needs to be released through the BOV, you may lose power because the gti was made to use this remaining boost and not release it, this really reduces turbo lag, the 2.0T was designed around the turbo

[GTI2007]

If the throttle valve closes when the engine is in overrun (when you let go of the accelerator or shift into an other gear), back pressure develops in the turbo housing. Back pressure reduces the speed of the turbine, which reduces boost pressure and increases turbo lag when the engine accelerates again. To avoid this, the turbo recirculating valve (sort of diverter valve) is opened. This allows the compressed air to flow back to the intake side of the circuit through the turbine to maintain turbine speed. That's how it normally works but if you increase the amount of intake air by installing a much better intake the turbo recirculating valve could become to small to recirculate all the excessive compressed air and then a BOV comes in handy

[Dubdr]

If the throttle valve closes when the engine is in overrun (when you let go of the accelerator or shift into an other gear), back pressure develops in the turbo housing. Back pressure reduces the speed of the turbine, which reduces boost pressure and increases turbo lag when the engine accelerates again. To avoid this, the turbo recirculating valve (sort of diverter valve) is opened. This allows the compressed air to flow back to the intake side of the circuit through the turbine to maintain turbine speed. That's how it normally works but if you increase the amount of intake air by installing a much better intake the turbo recirculating valve could become to small to recirculate all the excessive compressed air and then a BOV comes in handy

GREAT POST!!!! :thumbup:

[SollyD]

does anyone have better instructions I cant understand these that well.

[Dubdr]

does anyone have better instructions I cant understand these that well.

Those are the instructions from Forge, I think. Trust me, once you get under the car it all makes perfect sense.

[Sickspeed06]

i don't know about VW but with my MSprotege the only way to run an atmospheric BOV was to relocate the MAFS to the cold IC pipe. this is because the air that was diverted through the stock unit was recirculated back into the intake AFTER the MAFS. this meant that if you were to run atmospheric blowoff the air was being read by the MAFS but then dumped causing a rich condition and idle bog/stalling/reallyfreakinannoying.

does the same apply to my new GTi? will the atmospheric ventilation cause stalling or anything? i'll see if i can find a picture on my old forum of the mazdaspeed.

now that i look sorry for the ressurected post. i feel like a tard noob!

[alf]

i don't know about VW but with my MSprotege the only way to run an atmospheric BOV was to relocate the MAFS to the cold IC pipe. this is because the air that was diverted through the stock unit was recirculated back into the intake AFTER the MAFS. this meant that if you were to run atmospheric blowoff the air was being read by the MAFS but then dumped causing a rich condition and idle bog/stalling/reallyfreakinannoying.

does the same apply to my new GTi? will the atmospheric ventilation cause stalling or anything? i'll see if i can find a picture on my old forum of the mazdaspeed.

nice bump of an old post.

this is no way a BOV, its just a space that goes between the Recirvulative valve and the turbo, and it hs a few holes to make the SHHHHHHHH sounds.

thats all.

alf

[Sickspeed06]

thanks for the info, so no stalling. i just still think it's be wise not to atmospherically vent air that the MAF is reading. or is it a different electronic signal in VW's?

[alf]

thanks for the info, so no stalling. i just still think it's be wise not to atmospherically vent air that the MAF is reading. or is it a different electronic signal in VW's?

no stlaling at all homey. its all electronic.

we dont even hove an atmospherical official BOV for the GTI.

this is just a spacer, the maf is about 8 inches from the turbo inlet.

[Sickspeed06]

oooohhh awesome, thanks meng.

[DTMRyan]

we have those in stock 2! =)

[Neon Guy]

If the throttle valve closes when the engine is in overrun (when you let go of the accelerator or shift into an other gear), back pressure develops in the turbo housing. Back pressure reduces the speed of the turbine, which reduces boost pressure and increases turbo lag when the engine accelerates again. To avoid this, the turbo recirculating valve (sort of diverter valve) is opened. This allows the compressed air to flow back to the intake side of the circuit through the turbine to maintain turbine speed. That's how it normally works but if you increase the amount of intake air by installing a much better intake the turbo recirculating valve could become to small to recirculate all the excessive compressed air and then a BOV comes in handy

Thus the reason the diverter valve is located in the turbo housing... allowing instant release of the back pressure.
:bow:

[Volks]

So is the forge BOV are overall good for application ? or is just wasting..

Thanks and Rgds'

[gillm]

i had one on my car , ended up taking it off and putting it on ebay . sounded gay and did my head in

[Mike@Forge]

So is the forge BOV are overall good for application ? or is just wasting..

Thanks and Rgds'

There are NO negative effects from the use of our spacer. We've done data logs, dyno runs, and various tests, none of which resulted in any adverse affects on the engine.

We've sold thousands of units worldwide to date. No issues reported thus far. :thumbsup:

[Volks]

Thanks Mike for the info. Very appreciate and hope i'll enjoy the BOV.
Merry Christmas in advance.

[2.0Tgti]

I think I may invest in one after I get my car. The adjustable one looks great incase you have to take the car in. I love the sound I was just concerned about the issues I had back in the day wiht my HKS valve on my old 1.8T but this is totally different. With the placement the MAF will never know either way. Very cool.

[Mike@Forge]

You guys won't be disappointed. I promise! :thumbsup:

[2.0Tgti]

You guys won't be disappointed. I promise! :thumbsup:

sounds good. I think I'll pick one up next payday. I just got the car so I dont wanna do any real power increasing mods just yet but this could be fun and hold me over till my break in miles are done. maybe this and a boost gauge.:wink:

[sk8chip98]

i just got one for the holidays and havent had a chance yet to put it in. fing working or it has been raining oh well i cant wait to get it in.......

[2.0Tgti]

Hopefully doing the install in the morning. Got one in black and dying to put it in.:)

[Volks]

To:2.0Tgti

Please let us know, Is the spacer produced a good sound ? like the HKS one's ?

And wondering is there any problems on fitting ?

Thanks and B.Rgds'

[2.0Tgti]

I'll post up if anything goes wrong. But its such a simple design im sure itll be fine. But it definitly will not sound like the HKS. The only thing that sounds like that is the HKS valve. I've used it on previous turbo cars. Its that insert thing hwere the air blows by that causes that whistle/squeek sound. the Forge is more of a hiss from what I hear.

[2.0Tgti]

Well the install is done. It was a piece of cake for the most part. The top bolt is very hard to get to. I dont have a lift so getting under the car was a pain in the ass as well. Also here is a tip for the guys at forge if they ever update the directions. They make allen/torx stockets for a reason. Doing this install allen wrenches is a good way to piss yourself off again and again. you need to use a socket wrench or socketing screw driver with an allen or torx bit for an easier install. and the sound? It sounds great. No CEL like the old 1.8T days. The sound is literally a loud HISSSSSSSSSSSSSSSSSSSSSSSSSS. sounds really good. seems like a nice solid piece as well. fitment was great.

Thumbs up for Forge on another quality product;)

[Volks]

To:2.0Tgti

Thanks for you fully explanations.
I can't wait to get one. Probably if anything unsure I post you someday.

Rgds;

[sk8chip98]

put mine in the other day..... had a hell of a hard time disconecting the wires. so much so i just worked around them :) i like the way the spacer is simple and fits right in there good job forge. i cant wait to get my hands on your FMIC

[2.0Tgti]

To:2.0Tgti

Thanks for you fully explanations.
I can't wait to get one. Probably if anything unsure I post you someday.

Rgds;

Sounds good! good luck man.:thumbup:

[Geesevs]

sense this is getting a big bump from a long time ago.... I have the spacer installed on my car. I like the sound, sounds like a big-rig but the hss is longer. air bus style

[Get-a Trek]

How does the Forge BOV work with higher than OEM boost? Just flashed mine and know the B DV will be trashed in no time. And heard rumors the C DV isn't much better.

[VRmk3tomk5]

this will come in handy later this week

[brokendreams]

Alright. Small (or major) problem.

I have a 2007 GTI. I also seem to have a fourth damned bolt on TOP of the recirc valve. Anybody else experience this? The damned thing won't come off, and the damned fourth bolt is impossible to get off. No moving room at ALL (there is a long metal hose or pipe running just above it. Any work arounds?

[rickyC]

Take a pic and post it.

I did mine and there are similar looking bolts in the area, perhaps you are attempting to undo one that does not need to be undone?

Should only be 3. One is difficult to get to cuz you kind of have to reach around to the back of the valve and cannot see it very well. At least this was my experience doing the work under the car with my feet sticking out the front of the car while the car was on ramps.

[brokendreams]

I did the bottom three bolts. I saw all those. I can feel the pivot point where the other bolt is connected. I just can't see it, and there is NO way to get ANY tool in there easily. There is a bracket that hold together two pipes right above the bolt. You can Believe me, it's impossible. I tried for an hour.

No biggie. I'm selling the Spacer, if anyone wants it.

Picture to explain.

http://i167.photobucket.com/albums/u146/evilgti666/forge13ap.jpg

[brokendreams]

I'm an idiot. That bottom screw does NOT need to be removed. Duh! Guess I shouldn't attempt car surgery while on no sleep! I'll shoot again tonight... Have to go get a smaller extension for the socket wrench.

[brokendreams]

I got it installed... Not that big of a deal once you get in there (and have had some sleep) although, I do advise you to get a 5mm allen wrench and allen socket. You'll need the wrench for everything but the top bolt, and the top bolt will require the socket...

Also, your hands will cramp like a son of a bitch. It's a pretty tight squeeze.

[dubc]

On the Forge site it says this will not fit on the 2007 and on models. Is this true? I just got mine last week. Do I need the other spacer? This one?
http://forgemotorsport.com/content.asp?inc=product&cat=1703DV&product=FMFSITR

[sxedub]

On the Forge site it says this will not fit on the 2007 and on models. Is this true? I just got mine last week. Do I need the other spacer? This one?
http://forgemotorsport.com/content.asp?inc=product&cat=1703DV&product=FMFSITR

I noticed that the other day too, does anyone have any more insight on this? I was thinking of picking one up @ Waterfest.

[Neon Guy]

I noticed that the other day too, does anyone have any more insight on this? I was thinking of picking one up @ Waterfest.

"This spacer fits the remote mounted solenoid valves, as found on the 2007 year models, Audi S3, 30th Edition Golf and Leon Cupra , with the 2.0 litre FSIT engines."


If you have a UDM 2007 GTI you have a turbo mounted diverter valve.

[dubc]

UDM?

[sxedub]

"This spacer fits the remote mounted solenoid valves, as found on the 2007 year models, Audi S3, 30th Edition Golf and Leon Cupra , with the 2.0 litre FSIT engines."


If you have a UDM 2007 GTI you have a turbo mounted diverter valve.

Thanks!

[xcharlesy]

does this product make the stock diverter valve wear any faster then normal?

and how does the dealer stand on warranting it with this?

[BoostedThrills]

One thing I found odd after getting mine in today:

The Forge instructions say you need a 4mm allen socket, but it doesn't come close to fitting their bolts that come with the spacer; they're definitely 5mm. Is the 4mm for the stock bolts? (I haven't done the install yet, just curious.)

Luckily while at the hardware store, I picked up a 4mm and 5mm just in case.

[Kool_aiD]

for those curious about the sound (like i was) here is a link to a video
http://www.youtube.com/watch?v=HNmFczwDhRQ&feature=related

[Raven6t9]

There are NO negative effects from the use of our spacer. We've done data logs, dyno runs, and various tests, none of which resulted in any adverse affects on the engine.

We've sold thousands of units worldwide to date. No issues reported thus far. :thumbsup:

Do you have this data that you can post and we can look at? Im not trying to put you on the spot, but it would be rather helpful.
I can see a good debate from both sides. But one has to be better that the other, either recirculate or blow off.

[Raven6t9]

for those curious about the sound (like i was) here is a link to a video
http://www.youtube.com/watch?v=HNmFczwDhRQ&feature=related

Are you serious? Thats friggin it!?! I get that sound now with Stage I and a stock DV!!! What the Hell!! Please tell me that the Forge Spacer is much louder than that!

[Raven6t9]

does this product make the stock diverter valve wear any faster then normal?

and how does the dealer stand on warranting it with this?

Ive heard that your stock DV is much more likely to bust from using this spacer (thats what Ive heard many times), and I doubt that any dealer will warranty your stock DV with this mod attached to it, but you could always remove it before taking it to them.

[bwzimmerman]

I would say it would reduce the chance for a stock DV to tear. IMO it would releave the held presure on the stock DV. I am by no means a mechanic or turbo expert. I am just using logic..

Either that or it wont effect it at all.. i dont see how it would wear it out more. It doesnt change much besides where air goes.

[Raven6t9]

for those curious about the sound (like i was) here is a link to a video
http://www.youtube.com/watch?v=HNmFczwDhRQ&feature=related

I just installed mine and this video does not do the sound justice. Im not really happy with the sound. Unless you're racing or really pushing your car the BOV sound is more of a sputtery whooshing sound. Only when your really pushing it does it sound attractive to me.

[theonlyz]

Ok kinda new to the whole VW world!! Well actually about as new as new gets!! I want that Blow off sound but, what I really want is this HKS. Do they make one for the jetta's?? Why settle for second best if it's being removed in a couple weeks! Also is the adjustable one any closer sounding to this HKS that was mentioned.

Thanks hope to see more of you guys!!

[Housetek]

how long does this typically take to install?

Is it just as easier to take it off as it is to put on?

Id like to have it off when i go in for oil changes and such.

[MKV Turbo15]

how long does this typically take to install?

Is it just as easier to take it off as it is to put on?

Id like to have it off when i go in for oil changes and such.

Its pretty easy to put on, about 15-20 mins but the first time I guarantee you will take longer. One of the bolts is particularly hard to get off. And NO, you will not have to take it off for an oil change unless your dealer absolutely positively retardedly insists that you do......then in that case if they keep giving you shit, go someplace else.

Also Here are a couple off of mine.

With an intake you can hear it differently, and it doesnt go as long as some of the others ive heard. I like mine a bit better.

http://www.youtube.com/watch?v=hUh4z2KZoMk
http://www.youtube.com/watch?v=5aWW91ndTZ0&feature=related

LOL its also funny seeing the looks on peoples faces when a "girls" (jetta) car goes boostin by them

[Nolte]

One thing I found odd after getting mine in today:

The Forge instructions say you need a 4mm allen socket, but it doesn't come close to fitting their bolts that come with the spacer; they're definitely 5mm. Is the 4mm for the stock bolts? (I haven't done the install yet, just curious.)

Luckily while at the hardware store, I picked up a 4mm and 5mm just in case.

Sorry for the uber-bump of an old thread, but this question was skipped and never answered by the group and it happens to be one of mine as well.

The instructions actually state you need a 4mm, that you actually use a 5mm, and may have said 6mm towards the end. I need to go pick up this kind of socket in advance.

[esman7]

anyone had problems with bov's causin your car to run rich? ie. decreasing fuel efficiency

[FAS777]

just did the install, pretty easy.

you dont need a ratchet or extension peice.

you do need a 4mm Allen Key. using a L shaped allen key is all you need. getting to the top bolt is really easy with this type of allen key.

tried following instructions but using a ratchet in small space was very frustrating. I could do it again in about 15mins now know all you need is a allen key.

[JDraft]

Chiming in to say that the top bolt was a BITCH. It literally took me almost an hour for just that bolt. I swear to god it was like someone put Loctite on it at some point. The fact that I have big hands made it an even more arduous process.

[kwongo]

^^^ there was loctite on mine