IML337 said:
There's not a lot of truth or fact in any of these statements. Read vwvortex and you'll see that a bunch of guys have had unexplainable performance losses with this.
I suggest you do some reading, and find out and learn what a MAF (Mass Air Flow meter) is, and then you'll understand the real reason why VW designed the car to recirculate the air, instead of venting it to the atmosphere. Venting to the atmosphere when you have a MAF will mess up your a/f mixture and cause performance losses.
Venting to the atmosphere is also illegal in a lot of markets this car is exported to.
As for prolonging the life of the turbo? Hello? I don't even know WHY you would think that?!
Someone piss in your cereal? Wow I've never heard someone get so offended by a guess at why something was a certain way.
Firstly, I've spent a lot of time on vwvortex, and not a single person has dynoed a car and gotten mechanical proof that the forge spacer has diminished their horsepower. Every one on that board is using "it feels like I've lost power" statements also so you may want to rethink your accusation.
Secondly, my thought on why the venting to the atmosphere would save your turbo is incorrect because I confused intake air with exhaust air. It was late at night when I wrote it and wasn't thinking straight. What I should have said is that reusing the now warm air is probably worse that getting fresh new cooler air for combustion. You argue that the A/F mixture will be off because of the atmosheric air dump. That's what the MAF is for, to make sure you're taking in sufficient air. Just because you're not recirculating air back into the intake doesn't mean it won't get it from somewhere else, aka environment.
As far as the legal ramifications of venting to the atmosphere, I have heard that it is illegal but cannot understand why so many companies make blow off valves if it's such a terrible idea to vent to the atmosphere. From my understanding, BOV's expell extra intake air. To my knowledge it isn't comtaminated, just filtered. Why is this illegal, I mean I'm not arguing with you, I just don't understand why it is this way.