The passenger side rocker cover draws fresh air from the intake tube "post" maf. If you ran the line from the rocker cover to a open filter than you have introduced un-metered air into the system. This is why vararams instructions have you install a barb into the silicone connector "post" maf.

Either leave it the way Jeremy changed it, I know it doesn't look great, or switch to SD tune.

 

I'll leave it for now. Yeah he mentioned about it being a PITA since it has to be perfect with suck little room in between the MAF and TB. I trusted him, I just didn't know how to explain it correctly to some others, thank you.

 

I was in the same boat as you. When I had my vararam, there was zero space between the maf and the TB due to my FAST. I basicly did exactly what you did until I was able to have Jeremy tune my car SD.

 

What kinda problems would be present from doing this? I have the VARARAM and also put a filter at the end of the tube. But the car runs fine. It makes complete sense to me that this should act as a vacuum leak, but I haven't had any issues.
Changing to a SVEDE as soon as it gets here. So I should put a barbed fitting into the intake tube after the MAF with that one as well correct?

 

I will do SD eventually also, for now he just removed the MAF screen

 

It doesn't do a damn thing to your car. Disappointing to hear a reputable tuner told you otherwise.

I run one breather on each valve cover with zero problems (I also run a 100mm maf) as do countless others.

Do you have a pic of your set-up? Maybe you did something wrong?

 

That your car runs OK is fine but to say it doesn't do a damn thing is wrong and the tuner was right. Take the tube off in back of the TB going into the manifold and then cover it with your finger to stop the leak. The engine runs differently with unmetered air. SD fixes that as it doesn't care where the air is coming from.

 

All I had was the OEM breather tube that connects to the OEM intake with a filter on the end of it really. I was planning on getting a straight 90mm or 100mm Maf tube and going to an LS7 card style MAF, but I doubt it would fit right with the Vararam, but it might.

 

Yes, the breather creates the equivalent of a small vacuum leak. That may bother some folks, not me. I have the vararam with the breather, the shop that did the tune had no problems adjusting the tune with the breather after the vararam install, the Goat ran great and my fuel trims are well within the norm. I understand the concern, but it is really a non issue if you want it to be.

 

It's a small vacuum leak becaues the 'PCV' restrictor dumps air that it draws from the outside into the TB. It isn't much, but its still more air than what your MAF is telling the car is coming into the motor. That's the unmetered part. I'm wondering if you could just run the valley cover tube out into the engine bay with a breather filter on it too? Solve the whole issue?