Jm Fab Oil Catch Can

[DSMinn0vati0ns]

im gonna be purchasing a JM FAB oil catch can i think and have a quick question on the install. the ad says: "It can be installed by running a hose from the valve cover directly to the catch can, or by utilizing the 2nd inlet, and eliminating the PCV valve."

my question to you is how eliminating the PCV will work.. dont you still need the PCV valve to use vaccum and draw crank case pressure? not to sure on the install.. i have a SMIM.. anyone help me out?

i have researched the topic and i am still confused about the install thanks..

 

[talonalex92]

Im not familiar with the jm catch, but for mine I just ran the line off the valve cover to the catch, and left the pcv.

 

[snowborder714]

Call up JMFab and talk with them about it. They should be able to tell you all you need to know.

I wouldn't recommend eliminating the PCV system though. Maybe if it's a track-only car, but definitely not if it's street driven.

 

[DSMinn0vati0ns]

ya i dont plan on eliminating it.. i do drive it on the street a lot.. im just unfamiliar with how to hook the PCV valve up to the catch can and will the PCV valve still do its job with it not beging connected to a vacum source.

 

[snowborder714]

Well, I'm really not sure how the JMF catch can works, but it looks like it's just that - a catch can. If you plan on putting this on either your valve cover to intake line or your PCV line, you want the catch can to be in-line, not an end. If you haven't purchased it already, I'd suggest putting in Husky catch cans. I've done this (as well as many other people - not DSM specific, but Vette's, GTO's, SRT-4's, etc.) and it works very well and is very cheap!

Home Made Oil Catch Can Photo Gallery by AZ Solo at pbase.com

As I said, if you're going to put a catch can on either of those two lines, you want it in-line. Say you want to do the PCV line. You'll have a line coming from the PCV valve to the catch can and then a line from the catch can to the intake manifold. This way all the catch can does is catch the oil that blows out. It won't disrupt the normal system or flow of air.

 

[DSMinn0vati0ns]

i havent purchased a catch can yet.. but i have the magnus SMIM so i wouldnt be able to run a line from the CC to the intake manifold.. and i dont wanna run a line to the air intake either cause i dont wanna get any oil build up in my IC pipes and core..

am i making sense or do i still sound lost?

 

[brute]

Well, I'm really not sure how the JMF catch can works, but it looks like it's just that - a catch can. If you plan on putting this on either your valve cover to intake line or your PCV line, you want the catch can to be in-line, not an end. If you haven't purchased it already, I'd suggest putting in Husky catch cans. I've done this (as well as many other people - not DSM specific, but Vette's, GTO's, SRT-4's, etc.) and it works very well and is very cheap!

Home Made Oil Catch Can Photo Gallery by AZ Solo at pbase.com

This is the setup I use, although it's not 'name brand' I just have the Pepboys brand.

i havent purchased a catch can yet.. but i have the magnus SMIM so i wouldnt be able to run a line from the CC to the intake manifold.. and i dont wanna run a line to the air intake either cause i dont wanna get any oil build up in my IC pipes and core..

am i making sense or do i still sound lost?

The only reason it's routed to the air filter is so that it draws in clean, fresh air as opposed to engine bay air. I use a Dejon Tool intake without nipples and one of those APC or whatever Napa Pepboys ricer brand small filters. But if you want to run it to your filter, don't worry; as long as your PCV is working fine and is truly one way, you shouldn't get oil pre-turbo.

As for me, I snapped the PCV off with the threads in the valve cover when I was craning my motor out with the cherry picker. Sudden chainlink shift and it gave easy fix: just bought a brass nipple with some common threads, retapped the valve cover, and reconnected the hose. I have a check valve in there as well so it's like I made my own PCV. It has never leaked on me (i.e. oil coming out of the APC filter) and the catch can itself works great.

If any of this is hard to understand, I can draw up one of my famous MS Paint diagrams to help so just let me know!

 

[DSMinn0vati0ns]

right now i dont have anything hooked up to my PCV.. after i drive the car for a while when i pop the hood i see a little bit of oil that sprayed out of the PCV on the SMIM.. so i guess its working properly?

 

[Defiant]

As a motor igniter? Yes, that's the way to set it up.

 

[fourreGsixty3]

I can help tie this up.
If your car sees street use removal of the PCV isn't suggested, due to the fact that the PCV allows crankcase air to be drawn into the intake manifold when vacuum is present in the intake manifold. Once you start boosting the PCV valve will close, and your only ventilation of those vapors is through the small line on the right side of the valve cover that goes to the intake pipe (stock location). If the PCV is removed (race applications suggested only) it allows you to remove twice as much vapors while under boost.

If you keep the PCV then run the line on the ventilation hose to the catch can, then from the PCV to the other nipple on the catch can. This will keep it acting as stock, but will catch all the oil

For those that look to this in the future searches.

There is this as an option for those not wanting a PCV: Jay Racing Constant Crankcase Ventilation Pseudo PCV valve [CCV1] - $10.00 : Jay Racing

Hope that helps,

 

[DSMinn0vati0ns]

couldnt of said it better.. thanks man!

 

[blcknspo0ln]

FYI, that jay's racing vent hose is the same valve/fitting found on a stock intake manifold. Sorry Dustin, I had to throw that out there for us cheaper DSMers.

 

[fourreGsixty3]

HAHA Tom you cheap-o yes they are the same things though.

 

[Flash]

More info I talked about in a previous thread a while ago...

...What I never saw discussed was when your boosting for extended periods of time crankcase oil can get past the rings and cause detonation and fry rings, crack pistons, etc... Correct? For daily driving you will not be boosting for extended periods of time like around a road course for example; therefore you could benefit from keeping the PCV valve.

Link: http://www.dsmtuners.com/forums/newbie-forum/269071-pcv-valve-question.html

 

[DSM Jeff]

I have a question about all of this. I understand if you want to eliminate the pcv, you run lines to the catch tank and then a line back to the intake to draw vaccum. My question is, most catch can's have breathers. Is that going to cause any issues with drawing unmetered air or create some type of leak?
Or do you want a sealed catch can?

 

[fourreGsixty3]

What you do is that you put one line from the pcv to the catch can, and the breather vent on the VC goes to the other nipple on the oil catch can, and you want the catch can with the breather filter on it...thats how all the bad vapors get out of the system.

 

[DSM Jeff]

What you do is that you put one line from the pcv to the catch can, and the breather vent on the VC goes to the other nipple on the oil catch can, and you want the catch can with the breather filter on it...thats how all the bad vapors get out of the system.

I was under the impression that you needed to run another line back up to the intake manifold so that the catch can would still be in the circut and actually draw the vapors from the VC. I have a catch can for the VC breather and kept the PCV as stock. So Basically I can put a straight fitting in place of the pcv valve and run a 2nd line down to the catch can. Then use that nipple on the manifold as another vaccum port?

 

[fourreGsixty3]

Removal of the PCV is recommended for race applications only.


There are only 2 lines needed, if using stock locations. One line goes from the VC breather to the catch can, then the 2nd line goes from the catchcan to the PCV. Ill post a pic when i get back to my PC at my house as I am at work right now.

 

[fourreGsixty3]

Don't mind the custom placement of the second -AN line that would be where the stock PCV is.

You must be logged in to view this image or video.

 

[DirtyBirdRacing]

Hi,

So for race only applications, you mount your catch can. Run one line from the valve cover breather to the catch can. Take the PCV valve out, install one of those nifty nipples that was talked about before, and run a line from that nipple to the catch can, correct. Just making sure that Im not missing anything.

Bill