Bacon's farking useless dual catch can setup
 

You know why I did this? Because I could. Not for any shit or reasons floating around in your mind, not even one of them. And because I read some interesting stuff on the CTS-V forums about catch cans. And this being where we are, somebubby's gonna say something original like "WTF with 4 lbs of boost who cares?" or "WTF with no fucking turbo who cares?" or some shit about kittens or whatever.

Aluminum C-channel for a bracket for both. There needs to be room for two hoses on the back side and the bracket lets them lay on top of one duh other.

https://www.miataturbo.net/attachmen...ine=1368584696

Cans on firewall. I have replacement 90's ordered to get rid of these brassy ones.

https://www.miataturbo.net/attachmen...ine=1368584696

replaced PCV valve with one for 323 GTX turbo

https://www.miataturbo.net/attachmen...ine=1368584696

hose layout, which sucks. I will replace this with tubing to keep my "wire tuck" super clean look intact

https://www.miataturbo.net/attachmen...ine=1368584696

Whole motor, I got rid of my ricer red silicone adapter and replaced with all black.

https://www.miataturbo.net/attachmen...ine=1368584696

I took this out for a spin and seemed to think: Acceleration was either smoother or stronger. the gauge showed almost 1psi more boost at times. I don't know why that would be. Knock sensor never made a peep, but it was cool today only 63 so maybe there was nothing to knock about anyway.

We have few content rules here. One of them in "no profanity in thread titles."

(You can swear inside the thread itself all you want.)

I have corrected this, and you shall wear the Pony of Shame as penance for your transgression.

The thread has also been stickied.

Huh. Shamed and stickied, I'm flattered to have actually made a contribution on here given my underhood disease

Can you go into some more detail on your findings on the Caddy forum? I'm interested as to why 2 would be better than one? props for the nice bracket though :3

do you really have like 3-4' of hose just to route to a breather filter?

On the bracket: The trick is to drill access holes in the leg opposite the catch can bracket fasteners for straight shot wrench access to tighten them down

Yes this thread shows how much stuff came out of the cans

http://www.ctsvowners.com/forum/show...Dual-catch-can

Similar thread showing oil that was being entrained into the blower and how the catch can eliminated this

Dual catch can thread as promised - install and very interesting finds

Summer vs winter

Catch Can Contents Summer vs Winter

There's another thread I can't locate that shows the difference of what comes out of each can. Fuel and water condensate out of the non-PVC valve side and heavy oil out of the PCV side.

Another one I ran across that would be relevant to running an intercooler showed how the intercooler got coated with a film of oil on the inside raising IAT at the manifold, and even partially filled it reducing it's volume

If you mean the small open cone filter in the lower right of the photo no, there's only about 14 inch of 1/4 vaccum line, and that's an idle air bypass line that was originally plumbed to the stock Sebring plate style air filter unit. When I ditched the stock filter for the PRM/cowl induction setup this line still needed to be filtered

If you mean the catch cans they are closed not open to atm, and they have to reach the connection points, so that's 3/8 silicone vac line plumed and yes those are long. Those will be replaced with tubing because I don't like the look of the line. Length doesn't matter because it's flowing air, all I have to do with each line is make sure each run has a single high point so any condensate drains back and doesn't puddle and block the line.

Where does the passenger side catch can plumb back to, the intake?

Yes at the elbow on the intake side of the blower. On a stock motor this would have been the chrome line snaking around the front of the valve cover to the intake tube.

This tap is pre-blower, but post filter. When the engine is in vacuum mode clean air is drawn in through this side as vapor is drawn into the intake by the PCV valve opening, sort of a fresh air flush. In boost mode the GTX PCV valve should close (is this where my additional boost came from?) and this line's flow reverses as blow by flows out of the valve cover and goes into the intake to be burned in the engine

I think - I think - the purpose of the catch can on the PCV valve side is to keep the intake oil-free under part load when the PCV valve is open, and the one on the valve cover side is to keep oil vapor from going in the intake under boost and lowering the octane, plus keeping blower, piping, (intercooler if you have it) oil free. The two catch cans should oscillate back and forth with regard to which one is catching oil on/off boost.

So shiny. Good job.

What was your source for the cans? I tried using a single one to replace my PCV valve (it had a check valve built into it to function as the PCV) but for some reason it filled with oil a lot quicker than it should have, so I went back to the PCV.

Cheapest I found by far

Moroso Air Oil Separator - Lightning Motorsports - Made with bits of real lightning, so you know it's good !

Thank you kindly sir.

Yes. As soon as I put the Soopra PCV in my car I picked up 0.8psi errywhere, I even had logs to prove it (until I deleted them) so I could see 1psi being a legit number. Leaky PCV is suxorz.

Way nicer than my 1 quart paint can with a breather on top.

Finished the hard piping setup. I did put the white pill back in the air hose coming from the cam cover and it made a difference in startup (came up to idle right away) and I also think a hair more boost. Without that white orfice / pill it must act as both a vacuum and boost leak.

Materials were 3/8 hose, misc hoses with 90 degree angles in them sourced from hands-on at the auto parts store, 3/8 brake line and some metal clamps to hold the lines together that were originally transmission line clips from a Jeep of some sort.

https://www.miataturbo.net/attachmen...ine=1373218705

https://www.miataturbo.net/attachmen...ine=1373218705

https://www.miataturbo.net/attachmen...ine=1373218705

The hard piping was a bit of fussiness but IMHO it looks way better than all that 3/8 hose just laying on top of the motor

Dammit how long do I have to wear the pony of shame? Its embarrassing

:rofl::bowrofl::rofl:

Very well. The penance having been served, you may now wear the Pony of Enlightenment.

OMG so pretty! I bet it would be good in bed

Hahahahaha. Oh, man, that's just disturbing on so many levels...

Ok, no more avatar for you. :D

Dammit. There is no way to misbehave on this forum any more. :cry: Time to kick out the cash and become a supporter I suppose

Joe giveth, and Joe taketh away.

Here's the contents of the cans. 800 weekender road miles (no race or autocross) since install. Left one is the PCV valve side and right one is the vent (drivers) side can.

https://www.miataturbo.net/attachmen...ine=1378252198

PCV side can has a few sixteenths inch of oil in it, and it stinks a lot more than what is on the dipstick

https://www.miataturbo.net/attachmen...ine=1378252198

Poured it out in a glass bowl to take a closer look. It doesn't seem like there is much water or anything else in it, its mostly oil

Right now, this says catch can on the PCV valve side is useful, the other one is bone dry. Since this motor spends most of its time at part throttle on the street that seems to indicate the oil in the catch can has to be mostly fume drawn out of the crankcase under manifold vacuum. Blow by would show up in the other can from boost.

Your results may vary.

Questions:

1. Is there some type of internal baffle on the caps to catch the oil rather than it just travel in and out of the taps? I looked on the link, but didn't see any info there. I'm wondering if there's even more oil getting through than just what's caught.

2. I'm interested to see if you're catching the same amount of oil now with the hardlines that have a much more complex travel path, than the straight shot you basically had from the PVC to the catch can. Do you think the hard pipe angles will contribute to less oil collection - at least in the can? For example the bend on the top right for the driver's side, seems like oil would collect there and roll back towards the valve cover. I guess it'd generally serve the same purpose.

3. This is MT.net Next time you make hardline, it needs to be mandrel bent with mini-v-bands!

The catch cans have some sort of metallic baffle and a wire gauze in the top section and it looks like all the flow is forced down into the bowl. With vapor still flowing through im sure there is still some fraction of oil going through, but to what degree or efficiency at oil removal these run at I have no idea. Would be a question for moroso

I didn't run it hardly at all with the rubber hoses. I don't think a low spot in the tube matters because even if oil collects the engine will produce more than enough vacuum to clear it out. Manifold vacuum on my car is 20 to 23 inHg so it will certainly pull oil over an elevation of just a few inches.

I'm not sure if with a stock PVC system like mine if its relevant to consider the restriction of the tubing vs hose when the PCV valve is the flow restriction all by itself on the one side. On the other side the rubber elbow going out of the valve cover has the stock orfice pill inserted into the line, so that's clearly foing to be the restriction there.

I liked your set up so much I copied it.
I had been searching for oil catch can threads and found all sorts of shit that helped me on my way but then I stumbled upon this and knew what I had to do. Thanks for posting.
I still need to make a few changes but they're on for now. I really like your hard lines... maybe one day.
https://www.miataturbo.net/attachmen...ine=1403053504

Thanks. Now that Ive contributed something I deserve a special "man of the week" avatar. My setups been running fine since install with no issues other than replaced some silicone hose with rubber.