Cheap homemade Oil Catch Can
 

After some research i do my cheap homemade catch can too using the OEM power steering deposit

power steering deposit $0
clamps $0
air filter (found under my bed) $0
lines (free from BOOSTED D15B7) $0

Total cost (prices may vary) $0.00

some pics of how i do it

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Re: Cheap homemade Oil Catch Can
 

Mmm... what r u catching?

the vac from thr turbo inlet will suck air from atmosphere.... :S

Re: Cheap homemade Oil Catch Can
 

Then what you think if i change to this

1.- Run one line from valve cover to one port on catch can.
2.- Run the other line directly from the black box (on back of block) to other port on catch can.

Or tell to me which could be a good catch can setup

Re: Cheap homemade Oil Catch Can
 

Re-route my setup to the valve cover

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Re: Cheap homemade Oil Catch Can
 

you're just going in a circle, you need the crankcase to be in vaccuum all the time, or at least in boost for sure. I have been running mine completely open but it smokes a little in boost.

Here's one link I'll try and find another one.

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

Re: Cheap homemade Oil Catch Can
 

Then which could be a good setup?

Re: Cheap homemade Oil Catch Can
 

Here's what I did. It worked great, before I had this on my car smoked like a ----------er (to the point of "fogging" out an intersection), after I put this on it didnt burn a drop of oil.

https://www.homemadeturbo.com/forum/...?topic=69521.0

A slash cut would also be very effective and simple, pcv valve to a slash cut in the exhaust, done.

Edit: I got some head from some people saying it was a waste, the thing worked great, I will be making another one within the next few days for my new setup.

Re: Cheap homemade Oil Catch Can
 

Then this is basically what you do, i'm right?

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Re: Cheap homemade Oil Catch Can
 

Thats tite!

But should go in tech! MOVED...

Re: Cheap homemade Oil Catch Can
 

Great thinking on using the PS resevoir...that way you can mount it in a factory manner without having to make anything. Great idea.

Re: Cheap homemade Oil Catch Can
 

Using the pre-turbo pipe as a vac. source can be bad because the oil vapors lower the octane rating of your fuel, resulting in detonation.

Re: Cheap homemade Oil Catch Can
 

Then which could be a good vac instead of that pre-turbo line

Re: Cheap homemade Oil Catch Can
 

Thats why you use a catchcan. I dont understand why you would want a vented catchcan anyway? you're vaccum source would just suck through the vent in the catchcan and lower the vaccum on the crankcase.

Re: Cheap homemade Oil Catch Can
 

On my last diagram vac are taken from intake mani before boost, and from pre-turbo intake at boost, then, i was thinking this setup work better for vacuum under boost from pre-turbo intake if i use a non-vented setup, because from pre-turbo it suck air from the catch can (at boost suck air from crank case and intake mani) and if i use a vented setup also is going to suck air from the air filter reducing the vac pressure from pre-turbo.

Re: Cheap homemade Oil Catch Can
 

A catchcan won't trap vapors, just liquid oil.

Re: Cheap homemade Oil Catch Can
 

Here i attach an image showing what im talking about.

People says crank case must be in vac all the time

On number 1: intake mani suck air from crank case as stock before boost
On number 2: in boost the intake mani becomes presurized, so now we need another vac source, thats the reason we use pre-turbo intake as vacuum

Re: Cheap homemade Oil Catch Can
 

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Just set it up like that and throw a catch can somewhere in the mix. Otherwise how you have yours setup will end up with a massive vacuum leak out of boost.

Re: Cheap homemade Oil Catch Can
 

dude thats one of the cheapest ones i have seen so far

Re: Cheap homemade Oil Catch Can
 

i still say this design my buddy and i came up with is the best.

http://www.lukekailburn.com/media/misc/pcv2.jpg

-Luke

Re: Cheap homemade Oil Catch Can
 

I ran my BOV line to the old PCV manifold fitting. Then I ran the PCV and valve cover to the catch can which is sealed, and ran a vacuum line from the catch can to the turbo intake. I'll get some pics.

Re: Cheap homemade Oil Catch Can
 

I make some small changes into my setup, and i think this is the one im going to keep, here is the pic on car

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Re: Cheap homemade Oil Catch Can
 

I like it. I wonder how many people will notice at first glance.

Re: Cheap homemade Oil Catch Can
 

Wrong! You can do it that way, but the stock PCV needs to be on the IM side of that tee. Otherwise, when you boost the pressure in the IM will just flow through the can and back into the pre-turbo intake. Your crankcase will NOT see Vac under boost the way you show it in the pic.

Also, I think you already know that you need to lose the vent or else the system won't work. And you can stuff the resevoir with steel wool to catch oil VAPOR. Works like a filter.

P.S. I like the inline filter idea, but it needs to be over on the pre-turbo line. You're not going to get any detination from oil vapor while you're in vacuum.

Re: Cheap homemade Oil Catch Can
 

what is wrong with just running a line from the black box to a catch can, then a line from the VC to the catch can? on a 180-200whp D....

Re: Cheap homemade Oil Catch Can
 

???

Re: Cheap homemade Oil Catch Can
 

well thats how ive been told to do it by several people. what is a cheap and effective way to do it then? this is the last part of my build and its proving to be the most skeptical.

Re: Cheap homemade Oil Catch Can
 

Valvecover - vent to atmosphere
Black Box - to catchcan

Re: Cheap homemade Oil Catch Can
 

thats it??... does my catch can need to be vented? its got 2 ports, what do i do with the other?

Re: Cheap homemade Oil Catch Can
 

One goes to a vacuum source pre turbo, the other goes to the vacuum source on the intake mani. Make sure you have one way PCV valves on both of those lines.

Re: Cheap homemade Oil Catch Can
 

this is my problem, everybody says something different. is there a PCV for dummies thread? if i understood it a little more i wouldnt be so confused.

Re: Cheap homemade Oil Catch Can
 

You are going to hear a lot of different methods for routing your PCV.
One thing is for sure You do not want your bottom end to see boost, you can damage your main seal, that is why we disconnect the PCV system.
The valvecover is connected to the intake from the factory b/c it draws in air, but after our cars are boosted it forces air out, this is not healthy for the motor to vent properly.
I have been too lazy to research how factory turbocharged cars have their PCV set up. :P

Re: Cheap homemade Oil Catch Can
 

so what is wrong with just venting the VC and Black box to a catch can? this seems to be very simple, what i dont understand is all the complicated set-ups :S

Re: Cheap homemade Oil Catch Can
 

Dumb question:

What is a catch can for?
And what does it do?? catch oil??

Im confused

Re: Cheap homemade Oil Catch Can
 

That's what I do, I have my VC go to a Gatorade bottle with a brass barb in the cap with a breather filter on it for catch can. Then from the charcoal box I have another Gatorade bottle. They seem to work fine for me.

Re: Cheap homemade Oil Catch Can
 

ive tried setups with the preturbo intake for vac in boost and found it makes almost none. u will get some junk in the tank regaurdless. i also thought of the using one way valves so it still gets vac at idle like stock but i was told its pointless?

ive always wanted to see how stock turbo cars have there pcv system, anyone know?

Re: Cheap homemade Oil Catch Can
 

i like the idea of using the power steering resevior. that would be stealthy.

Re: Cheap homemade Oil Catch Can
 

I'm confused as well. This is what I'm using currently, and I'm just running one line to the black box, and the other to the valve cover. I'm in the process of having another set up built, and this is one thing that I have heard several different opinions on. I'm planning on running a lot of boost on this motor, so what do I need to do? I bought another catch can, but it pretty much looks like it does the same thing as this does.
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