Brice's NA V6 Build

They idle at low pressure, 4psi~. Much lower than that and i'd imagine it would complain

 

Not yet In my case.

 

Do you have any vacuum issues while not under boost with your pcv set up like this? If your pcv intake is taking in unmetered air then isn't that a vacuum leak? I'm completely on the isolated pcv wagon now. While I agree the system has benefits, the bottom line is outside of an auxiliary vacuum unit the pcv system will never be operating as intended while under boost. Even keeping it in tact you will only see it's benefits while not creating boost which I would argue based only on intuition is not nearly as important as high load conditions where boost is being produced.

Under stock configurations you're also using the intake vent of the pcv as an exhaust port for blow by which is routed pre turbo while under boost. No personal experience but I have not yet seen an article claiming this is ok for the turbo. Although as you stated you have your intake vent to atmosphere so this is not an issue for you but that brings me back to my vacuum leak question.

 

Oh an also where are you guys plumbing your oil feed for the turbo? I used the 4 way adapter provided by CX into what I think is the oil pressure sensor off the block. The sensor has a single wire going to it and is on the front, bottom portion of the block on the driver side, just forward of the oil filter for reference

 

I never realized why you kept bringing up the vacuum leak deal until I watched a youtube video explaining it...I'll Have to look into that..

 

Right below the Oil sender is a hex bolt that is pressurized oil, and it's what I used.

 

A good descriptive video will always make the explanation resound with clarity.

 

Which video did you watch btw?

 

this'n
https://youtu.be/OIvv3BM_350?t=393
Pretty nice channel, hopefully when I get a better camera and a mic I can make some stuff like this.

 

This method will have blowby during boost going straight into the turbo. I think it's actually a legitimate solution IFF you use a good catch can between the breather vent and the intake. It will work with your set up as well since you moved your MAF pre turbo. My MAF is on the cold side charge pipes so this isn't an option for me but if I ever move it this is definitely the set up I will use.

 

I originally had both vents routed to the catch can (vented) and for some reason this gave me low oil pressure at idle. The crank pressure must have some effect on oil pressure

I had a remote pressure installed for bit after my front end rebuild, why?

This vid is wrong on so many levels. To have the breather connected pre turbo, it will see vacuum causing the vent pressure to be sucked out pre turbo. The PCV is irrelevant at this point as the crank pressure will remain a vacuum.

Additionally, the PCV is connected to the charged side of the turbo and is a one way valve. When building boost, the crank pressure will have to overcome the charged pipe pressure in order to vent out the PCV (but in this case, it will just vent straight into the turbo).

Youtube videos are dangerous.

 

During non boost there will be less pressure at the TB than the intake tube, vacuum will be in the direction of the TB. PCV will work exactly as intended. During boost it will simple work in the opposite direction. The pcv closes, crank pressure will build higher since there is little or no actual vacuum at the intake (pre turbo) but will eventually be able to vent into the intake as crank pressure exceeds intake pressure. This is what the video had intended. His method to use the geometry of the intake fitting to create more vacuum is actually quite clever although to what extend it helps is up for debate.

There aren't many ways to keep the pcv functional when going from NA to boost. From my research this method is legitimate or at the very least works better than simply venting to atmosphere as you have a fully functional pcv system while not under boost and one that vents as well as to atmospheric pressure while under boost.

 

A catch can, breather, and one way check valve will maintain/enable the basic functionality of the PCV system and completely remove it from your intake, boosted or vacuum

 

If you're talking about venting both ends to atmosphere then I agree and is the route I will be taking initially. There are many benefits to having a functioning pcv system i.e. Crank case seeing vacuum at all times but with a boosted system the only way to have that crank vacuum while making boost (when crank pressure is at its highest) is with an auxiliary vacuum under your hood (big $$$).

 

I have to agree with Clay. In my mind it makes sense, retains stock function and some level of vacuum. Not that I will do it that way, but that it works. Atm I'm venting the FAI for the crank to atmo and running the PCV through a can to atmo.

 

Also there would only be a vacuum leak if the PCV was attached to the intake, which mine is not. Just remembered that

 

The "fresh air" vent should have a one way valve. The design is to have a fresh air in-put and the crank pressure to be vented out the PCV valve. The design is to have a flow of air to "clean out" the moist air from in your crank case.

You can still have a vacuum on the system cheaply by hooking up the PCV pre turbo but it's advised to put a catch can in between to keep the oily residue from gumbing up the turbo, intake, and MAF.

Only if you do what the guy in the video did and create a connection post MAF

 

I'm 99% sure the check valve was causing me to seep oil through the valve covers.

 

Remove your PCV valve and shake it. If it rattles its good but clean it out with some gum out spray (TB cleaner). If the one way valve caused the pressure to build, then the PCV is clogged.

Its supposed to flow like this:



Otherwise you don't get rid of all the hot moist air in your crank and when you shut off your engine, the water condenses in your crank case as the engine cools. There needs to be a one way flow of clean air and vent of oily air. Its not just a system to "vent" the pressure but also introduce clean air into your crank case.

 

Im not actually sure how much vacuum if any there is pre turbo but I hadn't even considered this option and it sounds like it might work. is this hoe yours is set up?