I'm in the process of installing and ETS air intake kit and it came with no instructions.

Question, what do you do with the vacuum tube from the wastegate solenoid that originally plugged into the underneath of the stock air intake tube (between MAF and turbo)?

My searches didn't come up with a clear answer. Please help! Thanks.

 

After more research turns out I just leave the vent hose from the boost solenoid as is, don't hook it back up to anything, and let it vent back to the atmosphere (VTA). Just make sure it's snug and not flopping around.

 

^^ dont listen to this guy haha, by doin that and leavin the vacuum plug open your gonna make your car run crappy, due to there being a vacuum leak pre turbo, if your using stock boost solenoid or 3 port, one line will run to that, if your running an ebc or mbc, then cap off the vacuum plug underneath the intake pipe.

 

Ok, all my searches (plus folks at ETS) confirmed to leave it be. Note I'm using the stock boost solenoid.

To be clear I'm *NOT* talking about the vacuum tube that connects the boost solenoid to the turbo wastegate. I'm talking about the vent tube that was originally connected to the stock intake. What is the difference for that tube now VTA vs venting to the air intake pipe... other than being nice to the environment and recirculating exhaust gases back to be burned off? Also note that hose does not have clamps on it so it's never under serious pressure.

Thanks. Be kind... I'm learning as I go.

 

The reason to recirc it back into the intake is that its air that has been metered by the MAF. So if its VTA'd then you have less air going to the engine than your MAF thinks.

And its intake air that goes through the BCS, not exhaust air. If I understand the OP correctly ETS didn't include a nipple to plumb the BCS back into the intake. They should have, but they didn't. All they can tell him now is its OK not to. None of this is an issue btw if you're running SD.

 

The intake only comes with 1 nipple. The nipple is for the PCV to Intake. The one from the BCS needs to be vented to the atmosphere. The reason for not including the second one is the majority of our customers seem to run a manual boost controller and bypass the solenoid all together and had to cap this nipple. It won't hurt anything to VTA the line that goes to the intake.

Thanks!

Michael

 

So correct me if I'm wrong (I am a newbie learning about Evos)... If the line from the BCS (idk what that stands for) isn't connected, wouldn't it stop the wastegate from opening? I just installed my short ram ETS intake and I'm having a bov flutter or compressor surge and I'm wondering if this is why.

 

BCS is Boost Control Solenoid.
The vacuum line mentioned above only vents What little air is bled by the solenoid. It is a very small amount. Leaving it to atmosphere affects nothing. It is just compressed air from the turbo. Technically, yes it is metered through the mass air sensor but not enough to matter.
It sounds like you may be asking about a different vacuum line?

 

I followed the instructions from a extreme turbo systems agent and let my boost control solenoid vent to the atmosphere... needless to say, it is a bad idea!! I put the stock air intake back on and I am going to have somebody weld a nipple on so I can connect the solenoid vacuum line. This company should know the importance of the solenoid, so why would they make an aftermarket part that takes control away from your wastegate. Shame on these guys. I don't know if I want to be a customer for these guys anymore

 

Why is it a bad idea?

 

I have a buddy who is very good with Evos. He said the BCS controls how the wastegate opens and closes. So by disconnecting that vaccun line, you loose control. My car did run a tad bit sluggish and after I reinstalled the stock intake, my boost returned to normal. I'd rather have that connected to be safe.

 

It's just the bleeder. I can't imagine the solenoid would care where it vents to. Though I admit I'm no engineer.

 

How true is this . I'm doing the same thing running a different intake set up

 

I Recently swapped from stock intake to an aftermarket one and did not reconnect the waste gate solenoid vacuum line to the new intake. I have previously done a lot of logs in the past and typically afr at WOT is high to mid 10s. After the swap, the car under same conditions (only intake changed) was bucking at peak boost and logging low 9s, even with target AFR at 11+. Added a vacuum nipple to the new intake and routed the line, all issues fixed. In conclusion, it was definitely dumping metered air and causing the overly rich condition.