Re: DIY Two Way PCV System How-To (HoMedepoT style)
 

Yeah plz fix the pix, or email em to 38927@whoever.com

Re: DIY Two Way PCV System How-To (HoMedepoT style)
 

This being HMT and all I think its time to slap together a pump system using an old emissions pump. Anyone do this or know of someone who has? I'm thinking you could get the pump relatively cheap at a junkyard and the rest is all tried and true. The only thing that I don't know about is the vacuum created by these emissions pumps vs. what would be the ideal vacuum for efficient crankcase evacuation.

Hmm...time to do my homework. :6

Re: DIY Two Way PCV System How-To (HoMedepoT style)
 

pictures are back, server might suck ass and be slow tho, cause its my home computer on my cable modem line.

Re: DIY Two Way PCV System How-To (HoMedepoT style)
 

so whats the advantage of doing this?

Re: DIY Two Way PCV System How-To (HoMedepoT style)
 

read man

regular pcv system only lets the crank case vent in vacuum not in boost
fooks lets it vent in both

Re: DIY Two Way PCV System How-To (HoMedepoT style)
 

crankcase pressure is hard on pistons and rings.

a stock pcv system allows air to be pulled from the crankcase by engine vacuum. when in boost there is no engine vacuum obviously, so you tap into the pre-turbo intake, which during boost will create a vacuum source to pull the crankcase pressure and vapors out. you incorporate the two pcv/check valves so that the regular vacuum source closes during boost, and so that the turbo intake source closes during vacuum. incorporating a catchcan into this simply catches the vapors so they dont end up sucked into your intake manifold or into your turbo.

make sense?

Re: DIY Two Way PCV System How-To (HoMedepoT style)
 

so doing this fooks way with another pcv valve at the hose going to teh air intake, flipped the opposite way asnormal, will make this work properly? And putting a catch can in-line between that pcv valve and the intake will keep you from sucking all that oil back into the motor (which causes detonation)......right?
I need to do a setup like this very soon. I think crankcase pressure is causing my front and rear main seals to leak...

Re: DIY Two Way PCV System How-To (HoMedepoT style)
 

you've got the right idea.

oil in the cylinders greatly increases chances of knock, boombabba boom. I added a diagram that will hopefully clear some confusion.

Re: DIY Two Way PCV System How-To (HoMedepoT style)
 

is this necissary for low boost application, around 7 lbs?

Re: DIY Two Way PCV System How-To (HoMedepoT style)
 

couldnt hurt. at 8 lbs, oil was getting by my front main seal.

Re: DIY Two Way PCV System How-To (HoMedepoT style)
 

I just threw a hose off the valve cover and let it vent towards the ground and a hose off of the black box on the back of the block towards the ground and let it vent to

No PRESSURE!

Re: DIY Two Way PCV System How-To (HoMedepoT style)
 

sounds very stinky there fishnet tits.

damnit i have to fix the ------- pictures again.

Re: DIY Two Way PCV System How-To (HoMedepoT style)
 

I made mine as simple as possible. This is how I did it. I made my own catch-can using a 3 inch pipe. Disregard the filter on top. I plugged that hole already. I cant stand those "sightglass" method so I use a dipstick from the Junkyard. From idle, I can feel vacuum already. I will actually use the top to hook up a vacuum gauge once I find a cheap boost/vac gauge.

http://www.imag.us/x/thermal99/PCV.gif

http://www.imag.us/x/thermal99/catch02.JPG

http://www.imag.us/x/thermal99/Dyno/02oct05_06.jpg

http://www.imag.us/x/thermal99/Dyno/02oct05_05.jpg

Re: DIY Two Way PCV System How-To (HoMedepoT style)
 

not bad, but you need a pcv valve from the intake to the can to keep boost from entering the can once the turbo starts spooling. I'm no expert, but it looks like you just need to move your pcv valve to that location instead of near the exhaust...

Re: DIY Two Way PCV System How-To (HoMedepoT style)
 

Are you talking to me? The can should never gets pressurized. Nowhere in my set-up that I tapped into the Intake Manifold... unless you are talking about the valve cover... that better not be pressurized....lol. That PCV valve is made of steel tho. I basically copied the Moroso Evacuation kit with parts I have laying around in the garage. ;D

Re: DIY Two Way PCV System How-To (HoMedepoT style)
 

yea. My bad. I read your "valve cover breather" as intake manifold for som ereason. I guess cuz thats how its shaped. :-[

Re: DIY Two Way PCV System How-To (HoMedepoT style)
 

if you run a line from the pcv on the valve cover to a catch can, you can run the next line to a slash in exhaust or slash in pre turbo piping, and there won't EVER be positive pressure, there will always be vacuum. of course, there will be more vacuum in the exhaust than the intake htough. you shouldn't need any check valves that way either, since the flow is always going the same direction: away from the valve cover.

Re: DIY Two Way PCV System How-To (HoMedepoT style)
 

Read all this, looked up a few other setups...Now I just want to ask if this will work..
I have an ODB2 motor, so the valve cover has the pcv valve, not the back of the block...

I take a tube from the normal breather hole on the back of the head, and the normal pcv location, connect them (no pcv yet) then run them through a catch can, then split off into two tubes..one with a pcv going to the IM, one just pointing to the ground. Good?

OR

Stock PCV routing (VC to IM) and add a VC to ground with backwards pcv?

TY, its just a little wierd for me becuase the pcv is on the VC. :S

Re: DIY Two Way PCV System How-To (HoMedepoT style)
 

ive been looking things up on this and read the whole thread but other than enviroment issues what is the downside of venting both?

Re: DIY Two Way PCV System How-To (HoMedepoT style)
 

:S :S :S :S :S :S :S :S :S :S :S

Re: DIY Two Way PCV System How-To (HoMedepoT style)
 

Wouldnt one of those things for a fish tank do the same?

Re: DIY Two Way PCV System How-To (HoMedepoT style)
 

Alright, after all this it seems all you have to do is connect both pcv/vc vent sources and then connect them through a pcv to a constant vacuum source. Yes?

Re: DIY Two Way PCV System How-To (HoMedepoT style)
 

i think the problem is that you need it to be ok to get some water in it, unlike a fish tank one... and a fish tank thing goes the wrong way... it blows air and you need to suck air...

it also may not be enough vacuum...

did anyone ever figure out how much vacuum we need?

Re: DIY Two Way PCV System How-To (HoMedepoT style)
 

15hg is what I heard.

Re: DIY Two Way PCV System How-To (HoMedepoT style)
 

so in other words use this setup but use another pvc between the intake of the turbo and the catch can right in the oppiste way

Re: DIY Two Way PCV System How-To (HoMedepoT style)
 

pics for the first post not working

Re: DIY Two Way PCV System How-To (HoMedepoT style)
 

well there should be no need for a pcv valve btwn the can and the intake. Boost doesnt come out of the intake. The pcv valves are to keep boost out of the can/block.

Re: DIY Two Way PCV System How-To (HoMedepoT style)
 

Ok. Here is my current (and very simple) setup. I don't have pre intake pipe (filter directly on compressor inlet), so I do that.
There isn't PCV valve anymore.

Please comment ...

http://perso.wanadoo.fr/civic16/PCVset.JPG

Re: DIY Two Way PCV System How-To (HoMedepoT style)
 

There's really no point in connecting the other port on your catch can to your valve cover, unless you didn't have a breather filter or didn't want to buy one. I guess a hose is cheaper. Setup should be fine.

Re: DIY Two Way PCV System How-To (HoMedepoT style)
 

Thanks

So it would be a better idea to use a breather filter on the valve cover, and don't use the second port of the catch can.
(just to be sure, English isn't my mother language).

Re: DIY Two Way PCV System How-To (HoMedepoT style)
 

No it would be the same exact thing since your catch can is vented. Most people run a breather filter, but you can leave your setup as is.

Re: DIY Two Way PCV System How-To (HoMedepoT style)
 

Mine is the best. Eliminated PCV valve, dumped tube from VC and PCV to a waterbottle. :6

Re: DIY Two Way PCV System How-To (HoMedepoT style)
 

so will FooK's setup work? and what do you mean by reverseing the PCV valve?(FooK). and do you have a picture of the filter, i went to homedepot and there was only one filter there. it was kinda big.

- draconx

Re: DIY Two Way PCV System How-To (HoMedepoT style)
 

Ok I think I understand it all now. Here is the setup I am planning on doing. I know it is not ideal cause it does not incorporate a vacuum under boost but it still allows the crank to vent.

Is this better than nothing?

http://4gcivic.net/pcv_diagram.jpg

Re: DIY Two Way PCV System How-To (HoMedepoT style)
 

Just use your 2 connections on the left. The one on the right makes no sense.

Re: DIY Two Way PCV System How-To (HoMedepoT style)
 

Problem with this design is that there's no vacuum source.

Re: DIY Two Way PCV System How-To (HoMedepoT style)
 

any comments on this setup??
-------------------------------------------------
http://www.we-todd-did-racing.com/we...MXk1NDE%3D.jpg
http://www.we-todd-did-racing.com/we...MXk1NDE%3D.jpg
http://www.we-todd-did-racing.com/we...MXk1NDE%3D.jpg
http://www.we-todd-did-racing.com/we...MXk1NDE%3D.jpg
http://www.we-todd-did-racing.com/we...MXk1NDE%3D.jpg

here's how you install it:
http://www.we-todd-did-racing.com/we...MXk1NDE%3D.jpg
or like this:
http://www.we-todd-did-racing.com/we...MXk1NDE%3D.jpg

I made this catch can with a 7 inch long 2" id pvc tube.
It cost $1.30 at home depot, they sell it by the foot if you don't wanna buy the 10ft tube they'll cut it for you.
The top and bottom are caps for 2" pvc tube .88 each.
the fittings are the small vacuume fittings for the oil viewer but i had some and didn't feel like buying 90 degree vacuume fittings so i just cut 2 Ts' and plugged the hole with jb weld.
As you can see I drilled a hole at the bottom of the container after I glued the bottom cap to the longer tube with some jb weld, not a whole lot, just a light film around the inside of the cap, not the tube.
Then I measured how much of the clear plastic drinking water tube I needed after I installed and glued the 2 90 deg. fittings. Put glue in the holes you drilled in the pvc tube for the fittings so there's something in there to seal it, and glue around the outside hole too.
For the top I just drilled one hole 3/8" and trimmed it some so the 3/8" to 1/4" T would fit. jb weld that in there too for a good seal.
oh, all I paid for this was .88 x 2 for the caps and 1.30 for the pvc tube. and you can never have too much jb weld so I bought some of that too $3.99 I think it was? plus the fittings that I already had, along with the hoses that I had.

-----------------------------------------------

Re: DIY Two Way PCV System How-To (HoMedepoT style)
 

Reaaallly, you dont neeed a vaccum source. If the engine can push all the ---- it wants out on its own, you'll be ok. 0 restriction will do the trick for budget setups. Only ballers need ~12hg of vaccum, which afaik is ideal.

Re: DIY Two Way PCV System How-To (HoMedepoT style)
 

This was my setup I ran according to your ideas for some month.
Now i removed the valve cover filter and T-ed it into the line between catch can and "black box". The only difference i have noticed is a bit more oil smell in cabin.

http://i62.photobucket.com/albums/h8...pcv_system.jpg

Re: DIY Two Way PCV System How-To (HoMedepoT style)
 

I have the backcut slash (bertoulli) method on my car. Works great. I have a sealed catchcan coming off the block. Breather on my valvecover (stock location) and a nipple welded onto my valvecover, behind the baffle, running to a 1way check valve to the backcut slash tube. Runs much better, but I do smoke occasionaly when getting on it. Not a big deal, just hard for some people to understand that my car is not burning oil-thats its actually supposed to be that way.

My buddy and I experimented with the slashcut tube. I had bought one from Moroso (like $10) and than noticed how easy it would be to make. Moroso has an extra lil slit on the backside of the angled cut. We put the one we made w/o the slit, and than put the Moroso one back in. We didn't notice a thing, no tests though. Just go to a plumbing/heating supply store and get a 6" section of black iron pipe and cut a 45degree cut in it. $2 instead of $10

Heres a pic of how the setup works. If anyone wants actual pics if they think it might help them out let me know.http://memimage.cardomain.net/member...81_51_full.jpg

Note: You need a one way check valve inline with the slashcut tube. You can use the 1 way check valves that are inline with the brake booster, just grab a few from the junkyard.

You can't use a slashcut tube with a vented catchcan either because you wont be creating and pulling vaccuum out of the engine, you will be pulling it from the breather can.



****Stinkyfeet****

Your catchcan looks great, but your setup is all wrong. With the slashcut tube you want to be pulling straight from your engine. There are 2 ways to do this, either putting the tube in your exhaust (which proves to get more vacuum but will make your car burn a lil bit) or preturbo intake tube. You can go for the stock rear nipple or its best to weld a nipple on to the front (all i know is b-series have a baffle up front, DO NOT weld in a nipple if it is not hidden by an internal oil baffle!!!).

You are making the slashcut tube work hard and waste some vacuum its creating by having to pull out all the extra air inside the catchcan, and possibly oil. If the catchcan is full you are going to be pulling oil straight into your turbo :3

Also on the other setup it looks as if you are pushing air into the valvecover....You are adding pressure, that is what you are trying to eliminate.