The deezums Catch Can
#122
SADFab Destructive Testing Engineer
![](/mt2011/images_td/ranks/supporter1.gif)
![](/mt2011/images_td/ranks/moderator.png)
Thread Starter
iTrader: (5)
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 18,642
Total Cats: 1,866
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
<p>Swabbed the intake manifold side with a q-tip after a track day. There was a bit of gunk there, maybe its not filtering enough? Should it be completely clean?</p>
#126
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
EDIT: added pics.
Not sure but after running it like this for 80k miles on a K20, I saw vented catch cans on Miatas removing a vacuum source altogether and venting it to atmosphere. I looked into it for a while from dealing with the breather tube on the exhaust side when making a CAI but decided it's best to keep the vacuum source.
my K20, PCV to IM:
![](https://www.miataturbo.net/attachments/engine-performance-56/149397-deezums-catch-can-80-21178362788_3ec51ec5f6_b_4ae6b5288cd76b8da01e4b9973e29a6ba8e66cfd.jpg?dateline=1442160269)
![](https://www.miataturbo.net/attachments/engine-performance-56/149398-deezums-catch-can-80-21355451022_ae67440b51_b_8aab71e45f9a2bfca9db414708119a399ae9172d.jpg?dateline=1442160269)
VTAs
![](https://www.miataturbo.net/attachments/engine-performance-56/149399-deezums-catch-can-80-21090850096_e39f4f328e_z_2fd55e0d88df8a359ec8c6894153d1cea6d6d25b.jpg?dateline=1442160269)
![](https://www.miataturbo.net/attachments/engine-performance-56/149400-deezums-catch-can-80-21124786341_03b3df5937_b_eef94db2044ea69cc6ea11c38cc32c46b224ac78.jpg?dateline=1442160269)
![](https://www.miataturbo.net/attachments/engine-performance-56/149401-deezums-catch-can-80-engine_11fd8d06b0433e19493d2e8f50ce5b6fa4679f1b.jpg?dateline=1442160269)
They may have removed the PCV altogether, thereby not needing the valve so who knows. I do know that oil vapors do not enter/exit through the exhaust manifold side.
Not sure but after running it like this for 80k miles on a K20, I saw vented catch cans on Miatas removing a vacuum source altogether and venting it to atmosphere. I looked into it for a while from dealing with the breather tube on the exhaust side when making a CAI but decided it's best to keep the vacuum source.
my K20, PCV to IM:
![](https://www.miataturbo.net/attachments/engine-performance-56/149397-deezums-catch-can-80-21178362788_3ec51ec5f6_b_4ae6b5288cd76b8da01e4b9973e29a6ba8e66cfd.jpg?dateline=1442160269)
![](https://www.miataturbo.net/attachments/engine-performance-56/149398-deezums-catch-can-80-21355451022_ae67440b51_b_8aab71e45f9a2bfca9db414708119a399ae9172d.jpg?dateline=1442160269)
VTAs
![](https://www.miataturbo.net/attachments/engine-performance-56/149399-deezums-catch-can-80-21090850096_e39f4f328e_z_2fd55e0d88df8a359ec8c6894153d1cea6d6d25b.jpg?dateline=1442160269)
![](https://www.miataturbo.net/attachments/engine-performance-56/149400-deezums-catch-can-80-21124786341_03b3df5937_b_eef94db2044ea69cc6ea11c38cc32c46b224ac78.jpg?dateline=1442160269)
![](https://www.miataturbo.net/attachments/engine-performance-56/149401-deezums-catch-can-80-engine_11fd8d06b0433e19493d2e8f50ce5b6fa4679f1b.jpg?dateline=1442160269)
They may have removed the PCV altogether, thereby not needing the valve so who knows. I do know that oil vapors do not enter/exit through the exhaust manifold side.
Last edited by greeenteeee; 09-13-2015 at 12:04 PM.
#127
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
To catch oil so it doesn't go wherever the exit hose on the catch can goes. Whether that's a little filter, the engine's air intake, or atmosphere. I used to have a little filter on the breather on the exhaust side. After 6-8 months of daily-ing with 17 PSI, it would saturate with oil and drip on the turbo manifold. I would just clean the filter when I smelled it, but a catch can would have made that problem go away.
#129
SadFab CEO
![](/mt2011/images_td/ranks/supporter1.gif)
iTrader: (3)
Join Date: Sep 2012
Location: your mom's house phoenix, AZ
Posts: 4,560
Total Cats: 1,142
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
Wanted to post that this didn't work. I finally got it installed and im driving the car enough to get some oil in there now. I was idling the other day with the hood open, showing off, when I noticed the catch can was bubbling through the drain, at about 30kpa. So I threaded the bottom piece for a screw and sealed it up with an o-ring. I have been unscrewing the whole catch anyway and never once used the drain. But for those that want the convenience, get the valve aidan is using.
#130
SADFab Destructive Testing Engineer
![](/mt2011/images_td/ranks/supporter1.gif)
![](/mt2011/images_td/ranks/moderator.png)
Thread Starter
iTrader: (5)
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 18,642
Total Cats: 1,866
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
The one from home depot has been working for me (I think) now that it has dried out its not nasty and frothy anymore.
I also just got around to adding another one on my drivers side.
![](https://www.miataturbo.net/attachments/engine-performance-56/168900-deezums-catch-can-chdbzai.jpg?dateline=1461087730)
![](https://www.miataturbo.net/attachments/engine-performance-56/168901-deezums-catch-can-ywsijwj.jpg?dateline=1461087730)
I also just got around to adding another one on my drivers side.
![](https://www.miataturbo.net/attachments/engine-performance-56/168900-deezums-catch-can-chdbzai.jpg?dateline=1461087730)
![](https://www.miataturbo.net/attachments/engine-performance-56/168901-deezums-catch-can-ywsijwj.jpg?dateline=1461087730)
![](https://www.miataturbo.net/attachments/engine-performance-56/168902-deezums-catch-can-uve6e4j.jpg?dateline=1461087730)
#131
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
I'm in the middle of building a driver side catch can. I messed around with the air/oil separator there but noticed that some oil gets sucked back in during vac conditions.
So I decided to make a 2 way separator. I'm not sure if it really matters...
Also if you guys run to sears they have a huge version of these separators with built in brackets. I'm running one of those on my pressure side and its working great!
Sears.com
So I decided to make a 2 way separator. I'm not sure if it really matters...
Also if you guys run to sears they have a huge version of these separators with built in brackets. I'm running one of those on my pressure side and its working great!
Sears.com
#139
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
Now I see it. Had to look harder. And just to clarify, you aren't running VTA on the pcv side because you want it to create a vacuum correct? According to this http://gearheadsmiataclub.net/vB/sho...h-can-breather you don't need to have a closed system if you don't want to.