Is it ok to have a Blow-Off Valve on A4 2.0T

[quickaudi07]

I just bought a Blow-Off valve for my A4.

http://www.ecstuning.com/Audi-B7_A4-...Intake/ES9603/

After buying it, I have talked to few people and they told me it's not the best thing to put one on the 2.0T engines.

What do you guy’s thing. I have that installed right now and I haven't noticed any problems.
Thanks

[Slo.Mo.Shun.]

Do not do it, the car does not run correctly.

I have an HKS ssq and it messes up with the mixture every time it blows off.

Get an intake if you want that BOV sound.

[Tanner]

The 2.0T engine is designed to not vent the air into the atmosphere.

The ECU will add fuel to what was metered originally (by the MAF) but guess what, it was just vented out into the atmosphere, so the mixture will be rich.

Is it okay, probably, does the engine run the best in terms of efficiency/economy? No.

[moedog]

my undertanding is that fuel milage is hindered a bit ( less then 10% ) but the biggest issues are at high RPM.

[Sh4wn]

What about a hybrid blowoff/DV, I have one from turbosmart on my B6

[quickaudi07]

I really didn't notice any difference in the gas/mileage usage. When i took my car to Audi, they told that they cant work on it because the air breather is changed so i had to put it back to stock and i don’t think i will put blow-off valve that back on. I just wanted to see what you guys have to say about that.
So from my understanding its best to take it off and put the stock breather on it. I also have cold air intake installed and few other moods like Revo Stage2 and full system exhaust from milltek with test pipe.
I'm also getting codes for cam flower. I hope they be able to fix that problem.

[Vorsprung]

The 2.0T engine is designed to not vent the air into the atmosphere.

The ECU will add fuel to what was metered originally (by the MAF) but guess what, it was just vented out into the atmosphere, so the mixture will be rich.

Is it okay, probably, does the engine run the best in terms of efficiency/economy? No.

Best answer.

[quickaudi07]

Best answer.

Thank You
I will take that blowoff valve out today, I didn't drive my car so its going to be nice and cold for me to replace it.

[Sh4wn]

Any thoughts on this Forge Motorsport Atmospheric Blow Off spacer ?

[harryd14]

that is probably the one he is speaking of... but it doesnt matter which company it is, they will all have some negative effects on the power of the engine and could increase the turbo lag taking longer to spool the turbo and get into the power band...

[Geoffafa]

Any thoughts on this Forge Motorsport Atmospheric Blow Off spacer ?

Can be annoying at times. I wouldn't put it on my car as i've seen it cause leaks. But forged is a great name brand and if will change the sound greatly.

[redlabel81]

What about the APR R1? I am considering putting one on my 1.8TQ.....

[firemedic337]

HID how did you get the hks on? I had one and Spike couldn't get it on? How dd you manage?? Thank

[Fobia]

Can be annoying at times. I wouldn't put it on my car as i've seen it cause leaks. But forged is a great name brand and if will change the sound greatly.

imo it just "leaks" when you do not put load on it.. therefore the DV is open letting out air because the engine is not under load.. if you put it under load it will seal up.

i have had it for probably 25,000 miles.. i put 200whp down on a mustang dyno with just a apr chip so i dont know how you could say it would affect performance because those are respectable numbers.

[Bryan]

^^ do you mean this one ??? Atmosheric Blow Off Valve For VAG 2.0 FSi Turbo Engines ?
I got this for free... but Im afarid that may cause engine problem..

any inputs ??

Thanks

[Bryan]

the link :http://www.ecstuning.com/Audi-B7_A4-...Intake/ES5857/

[quickaudi07]

I haven't noticed any problems. The car runs fine, But i did noticed that my gas is going down alot faster, i dont know if its because I just got that chipped with STAGE 2 Revo, or is it becasue i love the feel of being pushed in to the chair.

next time i will tank up, I'm going to see what kind of milage im gonig to get out of a full tank. Before stage2 i was getting over 350m.... I wonder what im going to get now ;)
I will keep you guys posted...

[Coderedpl]

SO whats the general idea of the Atmospheric Blow Off spacer for VAG 2.0 FSiT?

Bad on mileage?
What's the real benefit of having it?

[sl2.oturbo]

a forge D/v isn't a problem is it ?

[Hyphy]

a forge D/v isn't a problem is it ?

Nope, you'll be fine.

[JMG]

imo it just "leaks" when you do not put load on it.. therefore the DV is open letting out air because the engine is not under load.. if you put it under load it will seal up.

i have had it for probably 25,000 miles.. i put 200whp down on a mustang dyno with just a apr chip so i dont know how you could say it would affect performance because those are respectable numbers.

Here's my reasoning with that:

That "leaked" air is still metered air that is supposed to DIVERT back to the intake. Having a DIVERTER valve with a spacer is, in function, the same thing as leaking with a bov.

Adverse effects are probably not noticeable to the butt dyno and will not negate gains from a chip. So just because your chip is giving you better numbers doesn't mean the spacer is adding or at least not harming your setup. The harm you are doing to your cats won't be noticed until the car is older, by then you probably won't be the owner of it anymore. ie you will probably not notice any harmfull effects of running an open atmosphere part on a closed system car in this case, BUT, you aren't gaining anything either. So you have ZERO performance gain for POSSIBLE harm. I think most people know what the SMART decision is. Now, if you are going for pure sound and sound only with no performance gain and possible harm, then that is your decision. People have a label for that mentality, and whether or not it's a fair label is irrelevant to the fact that it is their opinion of you. You either live with it, or fight it, but it doesn't change anyone's opinion.

SO whats the general idea of the Atmospheric Blow Off spacer for VAG 2.0 FSiT?

Bad on mileage?
What's the real benefit of having it?

On a closed system A4, there is no benefit other than sound.

[Slo.Mo.Shun.]

SO whats the general idea of the Atmospheric Blow Off spacer for VAG 2.0 FSiT?

Bad on mileage?
What's the real benefit of having it?

Let me put it this way... Every time you let go of the gas and the BOV vents, the car freaks out and there is a noticeable power loss and increased lag.

[sl2.oturbo]

Nope, you'll be fine.

thanks man

[quickaudi07]

Thanks guys for all the help. The car is back to stock DV is placed where it should be and Blow-OFF valve is out of the car. The sound was getting anoying after while.

Thank You all

[Hyphy]

hi

[davis449]

If you want sound, get an intake.

[quickaudi07]

If you want sound, get an intake.

allready have a cold air intake.

[Slobo7x]

HKS SSQ is superior in design to stock, get the blow off vavle recirculation hose and hook it up. You'll be good.

[Slo.Mo.Shun.]

HKS SSQ is superior in design to stock, get the blow off vavle recirculation hose and hook it up. You'll be good.

The SSQ becomes obnoxious really fast, it might be a different story with the DV kit, but it must still flutter all over the place.

For those looking for a serious DV get a Forge Supersize valve.

[clemsongt]

If you really, really wanted a BOV without sacrificing any performance or pissing off the computer, couldn't you just try to relocate the MAF sensor to after the turbo? That way any air that is or isn't recirculated would be accounted for. The MAF would only register the air that went into the intake manifold.

[JMG]

HKS SSQ is superior in design to stock, get the blow off vavle recirculation hose and hook it up. You'll be good.

A proper DV has superior design and true function without macgyvering a part that does something it's not supposed to do. It's like buying square wheels and molding rubber fittings to get a round wheel. Just get a round wheel.

[SykoraA4]

If you really, really wanted a BOV without sacrificing any performance or pissing off the computer, couldn't you just try to relocate the MAF sensor to after the turbo? That way any air that is or isn't recirculated would be accounted for. The MAF would only register the air that went into the intake manifold.

I've seen it done on a b5. if you really wanted it to work you'd need a pretty good catch can setup. The oil vapors will jack up your maf pretty quickly if you dont. it wasnt recommended

[kelvin1414]

Hi man look in to a forge bov made for an audi

[Axis]

[Danaldson]

lol

[kelvin1414]

Get a forge bov recirculation kit works and sounds great on my audi a4 08 b7.reference to YouTube forge bov kit installation on a vw I don't think they would've done it ,if it was harmful to your vehicle.

[Jake@JHM]

no

[p0isin]

10+ years since the b7 a4 was released and we are still talking about blow off valves. God damn

[Jake@JHM]

10+ years since the b7 a4 was released and we are still talking about blow off valves. God damn

People wanna go choo man

[AllroadCorbin]

no

Lol


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