PCV Removal (substantial searching)

[Raymos24]

So after reading and searching for a good hour, I have a couple questions about removing my pcv valve. I currently have a closed greddy catch can. The catch can has two line, one that is connected to the side port on the valve cover and the other is just venting to the atmosphere. I now want to remove the pcv valve because I need to rid myself of excessive crankcase pressure. MY question is: I know many people simply replace the pcv with a barb and run it to the catch can and vent. However, I don't think I want to deal with the augmented fuel trims and the vaccuum leak that creats. My question is, would I be able to replace the pcv with a barb. Then run the both the side port and the new barb to the catch can. Then drill out on the catch can and add another line to run it to the intake pipe? If I do this system, will my system alleviate crankcase pressure, while not having a vaccuum leak?

Basically:

Side port + Barb (formerly pcv) -> Greddy Catch can---> line to intake pipe

 

[SlowChild3]

Ill tell you what now to do... put a cone filter on and let it get clogged with oil, blow the dipstick, soak the alt and PS pump with oil, and run low on oil resulting to a knock. Lol. I think that's what happens to this 90 talon awd i just got. Sorry that it doesn't answer your question.

Sent from my Eris using Tapatalk

 

[Raymos24]

Haha no problem. That is exactly what I am trying to stop from happening .

 

[99gst_racer]

Your idea would work to some extent. The size of the ports can become a restriction if you have excessive crankcase pressure. That's why many guys weld on larger ports. Also, that greddy can won't collect aresol oil vapor as well as some other options out there, so some of it will get by the can and into the intake pipe and compressor.

Read through this if you haven't already: http://www.dsmtuners.com/forums/articles-engine-fuel/366890-4g63t-pcv-system.html

 

[Raymos24]

Yea thanks for the link. I read through that entire thread and that is where I came up with this idea. Essentially during boost the vaccuum created by the intake pipe from the turbo would "suck out" even more crankcase pressure than just having it vent to the atmoshpere. I can always just place a filter instead of the line to the intake pipe. But I am trying to avoid having that vac leak and my trims augmented.

 

[mike96]

edit: i got beat to the punch...

ideally you should have to catch cans. the way the system is set up from the factory is the tube that runs from the PCV to the intake manifold pulleys crank pressure while the engine is running at a low speed and the turbo isn't really doing anything (I.E. no boost). the other tube going to from the valve cover to the intake tube before the turbo pulls the crank pressure when the turbo is working hard and boosting the engine, that's why there is a PCV valve in line with the intake manifold you don't want to pressurize the crankcase with 21PSI of boost. hooking the tube you have venting now back up to the intake tube will help.

 

[Raymos24]

Ok sounds good. My question is (please excuse me if it is dumb ), if I had both lines to the catch can and one line to the intake, would't the barb, which used to be the pcv, draw vaccuum from the catch can? While drawing vaccum, is it possible that the barb can suck in some bad fumes among other things?

 

[mike96]

yea, probably. thing you have to remember. theoretically doing what you are talking about will still put a tube hooked up to the intake so that there will still be a vacuum pulling all the crank gasses and oil and crap from the engine however i highly doubt that you will pull enough vacuum before the turbo for it to really be effective... that intake tube will flow a lot of volume of air but not a lot of vacuum when the turbo isn't working, until then it really won't do anything. something like this would probably be more effective, not so much the way he made the port bigger but how it connects to the exhaust.

http://www.dsmtuners.com/forums/cus...crank-case-evacuation-using-stock-baffle.html

 

[Raymos24]

Wow that's ingenius . I might try that idea of hooking it up to an exhaust part. I guess it would help even more.

 

[ReYnd]

Check valve? Haven't seen anyone suggest that yet. It's a given for every thread on this subject.