PCV VALVE QUESTION!
 

Alright guys. I have heard various things about boost and your pcv valve. Are you suppose to keep it in or take it out competly and just put a breather filter or something in its place?? Someone told me when you boost your car you need to completly remove your pcv valve or say good bye to your ringlands. Which makes sense considering i had mine still in when i destroyed all of mine. So i removed mine and have been driving it that way. But today someone said that is a horrible thing to do with a boosted car?? WHO DO I BELIEVE???!!!!!

Re: PCV VALVE QUESTION!
 

Believe me.

You don't want your PCV still hooked up under boost.

Check this out.

The PCV is on your intake, your PCV is not ready for boost, so this means... boost is getting in your oilpan... producing boost underneath your pistons... you don't want to have boost/pressure on both sides of your pistons dude.... this WILL fuckup your engine.

remove it... and hook it up for the intake of your turbo, or leave it in the open...

Re: PCV VALVE QUESTION!
 

Do what I did. Gut it & use the housing as a free breather.

Re: PCV VALVE QUESTION!
 

see thats what i thought too, thanks for clarifying that. Ive had my pcv valve completly out with just a breather on that little black box in the back for awhile, and havent had any problems yet. I just got confused because last night one of my friends with a almost 600whp civic hatch told me that i should still have it in?? I was like WTF????

Re: PCV VALVE QUESTION!
 

you can still have it, you just need to hook up a catch can.

see this thread on how to do it

https://www.homemadeturbo.com/forum/...?topic=41175.0

Re: PCV VALVE QUESTION!
 

what is the problem with removing the pcv valve why is it better to have a catch can??

Re: PCV VALVE QUESTION!
 

Just dump the pcv valve and run a catch can and do your sleeves a favor

Re: PCV VALVE QUESTION!
 

ok coo. See this is what i thought. I was pretty sure you were suppose to completly get rid of your pcv.

I threw away my pcv and I just have a filter comming out that black box in the back of the block. So you guys think that is okay??

Re: PCV VALVE QUESTION!
 

?

Re: PCV VALVE QUESTION!
 

Best setup i've seen and used so far is the "slashcut" vacuum source for your pcv. Pretty much it uses exhaust gasses to "pull" vacuum for your pcv setup. Alot of people have tried to use the intake side of the turbo as a source of vacuum, but honestly it really doesn't make that much vacuum on the inlet side. My slashcut will literally try to suck your finger down the hose, not just a little suction like the "pre-turbo" setup. And the reasoning for having a catch-can on a slashcut setup is because no matter what you do, you're sucking oil vapor of some sort. The catch can helps to trap the vapors instead of having them go straight out your exhaust or whatever your means of vacuum is. Only downfall to a slash cut is you're going to kiss your emissions inspection good-bye if you live in an area that requires one. The "search" button is your friend on this subject, there are alot of posts on this topic.

Re: PCV VALVE QUESTION!
 

oil catch cans are the ----, just run one

Re: PCV VALVE QUESTION!
 

I did the slashcut method and for some reason I receive pressure instead of vacuum. I thought I placed it in a good area of the exhaust system but obviously not.
I would love to see pics of someones slashcut setup. Post em up!

Re: PCV VALVE QUESTION!
 

OK you might have put the slash cut it backwards which would force air up the tube creating press.

-and the intake side for vacume is recomneded because it doesn't have enormous amounts of vacume. The whole idea is to release positive crank charge not suck what little amount of oil we have in there out.

One question i always had was when people put breather filters on their valve cover and also a catch can. to me it seems if your running a catch can no matter where from the whole idea is create a vacume system, doesn't the breather release that vac.?

Re: PCV VALVE QUESTION!
 

correction you can still have but with the line running to the pre turbo intake for the vaccum source.

Re: PCV VALVE QUESTION!
 

There are pros and cons to various methods of routing your PCV setup.

You can run a line from the pre-turbo intake for vaccuum but then you risk sucking oil vapors directly into your turbo and detonation sucks. You better make sure that you have a good baffled catch can and I'd throw some steel wool in there to catch as much oil vapor as you can.

Running to a slashcut in your exhaust is the best option IMO, who cares if a little extra oil vapor comes out of your tailpipe? But I do live in Wisconsin where emissions tests don't exist. God I would hate to live in California.

Or you can run the setup like mine, which is just a breather filter on the valve cover and I run a hollow PCV-size fitting directly to a catch can. It might not evacuate the crankcase as good as a setup that has a vaccuum source powering it, but it has been working fine for me for quite a while.