I recently bought two more catch cans to try making one for the Jeep.
Another one of those round cans with the morso mount, and I decided I wanted to try this one since I liked the way it looks.
The round catch can I normally buy has one big disadvantage.
the drain port on the bottom is some weird funky metric thread.
so, I usually just drill and tap it for 1/4 NPT, then install a ball valve.
That works great but it's a big extra step and a pita for me.
I saw the square one with clear bolts on the bottom and the top to disassemble the unit, meaning I can make my own baffles easily and install them.
I figured wth, I'll give it a shot.
Plus, I can always find a use for a spare catch can.
What I found is the drain port on the side is 1/8NPT!
I'm still on the search for a ball valve that fit's it, but for now it's perfect.
The "bad" the ports at the top still seem to be some weird metric fitting and not NPT.
I would like to one day make those AN fitting, but the nipples they provide seem to work good enough, and on this last catch can, I found I'm able to run some hard line through the larger sizes, then seal with Marine grade heat shrink tubing, then connect to the engine from there.
The issue I ran into with the Jeep, there isn't many places to mount anything.
there is a bunch of wasted space on the battery tray, but that's about it.
I found this catch can fit perfectly in the middle of some hoses and wires on that battery tray, so I decided to run with it.
One day I'll make a posting showing how I make baffles in the catch cans, but really, I just spent some time looking at high end (expensive) catch cans to see how they do it, and then work with that.
I had to take the intake off of the wife's Buick this past weekend, and while it looks like the simple design of that catch can I made for her car is working well, I did notice a tiny bit of oil in the return airline going into the intake.
This got me thinking about the design of the catch can overall.
The best working catch can I have made yet exists in the Tahoe as the #1 can.
That one built two chambers in the bottom of the can, one for the oil to sit in, and the one above it has some holes drilled into an aluminum sheet.
then in that chamber I made a little "fan" of sorts, copying my water separator that I use in my garage compressed air system.
I guess in theory it should make that air spin?
Or more likely the little blades help catch and separate more liquid from the heated air?
No clue!
but it works.
The bad part, I spent hours making that baffle.
And I have this super complex structure to help support that little "Fan" and to keep the middle chamber separated from the mesh that sits above it.
I had to break out the rivet gun to build it.
It's way over designed.
That's a one-time design, I don't think I'll ever bother making another one like that.
anyways, my rule is to always have fun with it.
