Home made oil catch can and routing questions

[LRS95TSI]

so i know this topic has been but i have decided to make my own oil catch can. here are my two methods including routing, please make comments as to which method is better/cleaner

1. make a catch can that resembles the greddy one...basically a 3d rectangle with two fittings and a drain fitting at the bottom. a line will run from the left hand side of the valve cover(like stock) to one fitting, another line will run from the other fitting to the intake pipe(stock) configuration.

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

2. make a catch can that resembles the JM fabrications one with a filter on the top. one line will run from the left hand side of the valve cover(like stock) to one fitting, and the intake pipe nipple will be capped off.

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

which method is better (are both methods even correct routing?), and if i use 1/8" thick sheet metal will i need to have the inside powder coated or plated somehow to prevent rust?

hopefully this will turn out good, i'd like to use ss lines and some good fittings and have it all polished/powder coated. if it turns out well, i'm going to make a coolant overflow as well.

here are real pictures for reference.

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

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

 

[Boostin2High]

There both gonna serve the same purpose..
I think the one with out the filter looks a lot cleaner.
And as far as the setup, it is correct.

Also too there is no chance of blowing oil in your engine bay..

 

[blcknspo0ln]

Both method's have been used forever now. The first design is the OEM routing, which recirculates back into the intake pipe. The second is a vented solution. Most people (including myself) will run this if the PCV system is eliminated. This way, you can run both ports off of the VC to the can. In terms of which one is better, that's really a matter of educated opinion. Most will argue for either side, but you'd have to search and make your own thoughts on that.

 

[turbosax2]

Your 1st catch can diagram is fine.

For the second catch can diagram, read these links before you make a decision:
http://www.dsmtuners.com/forums/newbie-forum/254437-oil-catch-can-help-needed.html
http://www.dsmtuners.com/forums/newbie-forum/229338-stupid-pcv-question.html

You're right, this has been beaten to death

 

[LRS95TSI]

i will probably stick with the first method, mainly because i'm not going to eliminate the pcv system and i want the routing to be similar to stock.

what about coating the inside and outside so it doesn't rust?

 

[Boostin2High]

If I'm not mistaken I believe 9 out of 10 are Stainless Steel so it shouldnt rust from the factory..The only ones I can consider other wise are home made ones..

If thats what you are doing then theres a few companies that make rust proof primer and paint..I wouldnt suggest paint the inside just incase it were to flake, unless you were to have it powder coated..just my .02

Also too just make sure you put some kind of pressure relief in there kind of like in pic 1.
If you dont you just create pressure with a possible chance for hose failure.

Make sure to post pics also. I've been thinkin of doing this but can't decide on the many options..

Good Luck

 

[LRS95TSI]

there shouldn't be any pressure present since there will be two hoses. i'm either going to have a stainless one made and polish it or just stick with normal 1/8" sheet metal and have it chromed or powder coated.

 

[ndsti]

I just made one but my approach was a lot easier. Here's how I created mine, I used a fuel water separator from a 94 polaris 650 jetski then just routed hoses to the proper locations. The separator works great because it's air tight and has a clear visible housing and the bottom portion is removable just unscrew it to clean the oil out. Here's a link to what i'm talking about.

I also relocated my battery so I mounted it under where the battery tray would be. It's out of the way and cost me $12 + cost of hose so ~$20

 

[Defiant]

The "pretty" one with the filter on it will coat everything under your hood with oil fumes, which do a marvelous job of attracting and holding dirt.

 

[daren_p]

1st method, would be my method of choice, stock routeing & a sealed system. The vented system will let unmetered air into the intake via PCV valve under vacuum conditions & as Defiant said, can leave a nice oily coating over your engine bay. With the sealed system hooked back into the intake, the vacuum created here helps evacuate the crank case better. I've ran this setup for a couple years & don't have any oily resadue in my intake/IC pipes. Sounds like the OP is making his own but for others that are reading this, JM Fab will make any of their catch cans for a sealed system, without an air filter, thats what I run.

 

[LRS95TSI]

yeah i plan on making my own, just because i'm an engineer at a company that has a machine shop so it's going to be free besides having it chromed or powder coated. i just got to decide if i'm going with steel or aluminum.