Catch can noob question

Sway · 03-31-2018, 05:18 PM

I just got in an oil catch can, I won’t lie it’s a cheap one I just bought better lines for it... but, the baffle is on the inlet, not the outlet... is that correct? I thought the baffle should go on the outlet to stop anything from going out, and the inlet should be free and open... am I wrong?

I was also planning on putting some steel wool in there to help it collect.

nandosman · 03-31-2018, 06:38 PM

Switch the inlet/outlet

Sway · 03-31-2018, 08:16 PM

That’s what I was thinking just hook the hoses up different, but I want to make sure if I’m right or not first, maybe I’m not lol

nandosman · 03-31-2018, 08:21 PM

Quote:

Originally Posted by Sway

That’s what I was thinking just hook the hoses up different, but I want to make sure if I’m right or not first, maybe I’m not lol

Check out the diagram in this guy's video:

https://www.youtube.com/watch?v=PWz6vCnJ4CA

Buzzkill247 · 03-31-2018, 10:03 PM

Baffle should always be on the inlet. The whole point of the catch can is to capture particulate matter and oil vapor/droplet. The purpose of the baffle is to cause a venturi-esque effect where the air is slowed, and particulates contact a surface to collect. "cleaned" air then escapes. This can't occur if a baffle is sitting right at the out/exhaust port.

TL:dr DO NOT switch the inlet/outlet like said above.

SouthArk370Z · 03-31-2018, 10:41 PM

In my experience with similar equipment in an industrial setting, it was always setup as per Buzzkill247 above - the work is done on the inlet side.

nandosman · 03-31-2018, 10:51 PM

My logic says baffle should be on the outlet too, but I'm no expert.

Sway · 04-01-2018, 01:41 PM

Thanks all! Good info in here!

-ZS-Carpenter · 04-01-2018, 05:05 PM

Are you just running lines just from the front pcv(like the DIY) or are you running both pcv and the intake breather vent into the can?

Sway · 04-01-2018, 08:58 PM

From the front pcv, but I also have an m370 so they’re t’d into a single line. Got it installed today! It looks nice! I’ll post a pic tomorrow... seb from specialty Z said my cars pulling a little timing possibly from blow by lowering my octane... I put on the catch can and used an air compressor to blow out the lines to make sure there wasn’t any oil built up in there. But I didn’t take off the upper mani and clean it... how long do you think I need to run before I can tell if it’s not pulling timing or anything? I feel like I need to take it apart and do some cleaning first.

Buzzkill247 · 04-02-2018, 01:31 AM

Quote:

Originally Posted by -ZS-Carpenter

Are you just running lines just from the front pcv(like the DIY) or are you running both pcv and the intake breather vent into the can?

Why would you run the crank intake breather side off the catchcan?? 1) always run from behind the MAF so you always have metered and filtered air. 2) always run your catch exhaust to atmospheric vent or back to intake manifold.

Those instructions are there for a reason. Far smarter people have engineered and tested and wrote the instructions. For a reason.

Sway · 04-02-2018, 10:44 AM

Maybe I didn’t understand the question, the pcv is t’d in the front, those two lines connect into a line that runs to my in on my catch can, the out then connects to the directly to the back of the m370 manifold. Is that not correct? I’ll take pictures on my lunch break and post them.

Edit: before, there was one single line that ran from the two t’d pcv valves, directly into the back of the manifold. I basically just put a catch can in the middle of that loop.

-ZS-Carpenter · 04-02-2018, 07:14 PM

Quote:

Originally Posted by Buzzkill247

Why would you run the crank intake breather side off the catchcan?? 1) always run from behind the MAF so you always have metered and filtered air. 2) always run your catch exhaust to atmospheric vent or back to intake manifold.

Those instructions are there for a reason. Far smarter people have engineered and tested and wrote the instructions. For a reason.

So just leave the breather hooked up? I must have misunderstood when i started planning this, i thought both the pcv and the cc breather would allow oil and gunk back into the intake.

-ZS-Carpenter · 04-02-2018, 08:12 PM

And isn't the admin catch can combo running all 4 vents to the cans? cap the intake and manifold ports, run both vents on the valve cover per side to the can then vented via filter?

just like the 13th post here
PCV Delete, Catch Cans, and Unmetered Air

only I was going to use 2 cheaper cans......is that all wrong?!?

Arrvaxx · 04-02-2018, 08:37 PM

Quote:

Originally Posted by nandosman

Check out the diagram in this guy's video:

https://www.youtube.com/watch?v=PWz6vCnJ4CA

LOL. My first thought was "That looks like an EE drawing." Yup. He's awesome.

03-31-2018, 05:18 PM	#1 (permalink)
Sway Track Member Join Date: Sep 2012 Location: TX Posts: 697 Drives: 2018 GTR Rep Power: 37871	Catch can noob question I just got in an oil catch can, I won’t lie it’s a cheap one I just bought better lines for it... but, the baffle is on the inlet, not the outlet... is that correct? I thought the baffle should go on the outlet to stop anything from going out, and the inlet should be free and open... am I wrong? I was also planning on putting some steel wool in there to help it collect. __________________ - White 2018 GTR FBO+E85 - Check out my old build thread: Sway’s Journal-Hitomi ~Live and let live!~

03-31-2018, 06:38 PM	#2 (permalink)
nandosman Enthusiast Member Join Date: Mar 2017 Location: IL, US Posts: 344 Drives: 2014 370Z T/S Rep Power: 9	Switch the inlet/outlet __________________ FI Non-Res Test Pipes \| FI 18" Res CBE \| Stillen Gen 3 CAI \| Dynotuned @ Dynosty EcuTek 325 whp

03-31-2018, 08:16 PM	#3 (permalink)
Sway Track Member Join Date: Sep 2012 Location: TX Posts: 697 Drives: 2018 GTR Rep Power: 37871	That’s what I was thinking just hook the hoses up different, but I want to make sure if I’m right or not first, maybe I’m not lol __________________ - White 2018 GTR FBO+E85 - Check out my old build thread: Sway’s Journal-Hitomi ~Live and let live!~

03-31-2018, 10:03 PM	#5 (permalink)
Buzzkill247 Base Member Join Date: Jan 2018 Location: FL Age: 50 Posts: 91 Drives: 16 370z KAD GunM 7AT Rep Power: 664	Baffle should always be on the inlet. The whole point of the catch can is to capture particulate matter and oil vapor/droplet. The purpose of the baffle is to cause a venturi-esque effect where the air is slowed, and particulates contact a surface to collect. "cleaned" air then escapes. This can't occur if a baffle is sitting right at the out/exhaust port. TL:dr DO NOT switch the inlet/outlet like said above. SouthArk370Z, Sway and -ZS-Carpenter like this.

03-31-2018, 10:41 PM	#6 (permalink)
SouthArk370Z Premium Member Join Date: Nov 2010 Location: South Arkansas Posts: 8,435 Drives: 2014 Challenger Rep Power: 324198	In my experience with similar equipment in an industrial setting, it was always setup as per Buzzkill247 above - the work is done on the inlet side. Sway likes this. __________________ Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

03-31-2018, 10:51 PM	#7 (permalink)
nandosman Enthusiast Member Join Date: Mar 2017 Location: IL, US Posts: 344 Drives: 2014 370Z T/S Rep Power: 9	My logic says baffle should be on the outlet too, but I'm no expert. Sway likes this. __________________ FI Non-Res Test Pipes \| FI 18" Res CBE \| Stillen Gen 3 CAI \| Dynotuned @ Dynosty EcuTek 325 whp

04-01-2018, 01:41 PM	#8 (permalink)
Sway Track Member Join Date: Sep 2012 Location: TX Posts: 697 Drives: 2018 GTR Rep Power: 37871	Thanks all! Good info in here! __________________ - White 2018 GTR FBO+E85 - Check out my old build thread: Sway’s Journal-Hitomi ~Live and let live!~

04-01-2018, 05:05 PM	#9 (permalink)
-ZS-Carpenter A True Z Fanatic Join Date: Sep 2016 Location: Illinois Posts: 2,410 Drives: 13 370z 6MT Rep Power: 2684367	Are you just running lines just from the front pcv(like the DIY) or are you running both pcv and the intake breather vent into the can?

04-01-2018, 08:58 PM	#10 (permalink)
Sway Track Member Join Date: Sep 2012 Location: TX Posts: 697 Drives: 2018 GTR Rep Power: 37871	From the front pcv, but I also have an m370 so they’re t’d into a single line. Got it installed today! It looks nice! I’ll post a pic tomorrow... seb from specialty Z said my cars pulling a little timing possibly from blow by lowering my octane... I put on the catch can and used an air compressor to blow out the lines to make sure there wasn’t any oil built up in there. But I didn’t take off the upper mani and clean it... how long do you think I need to run before I can tell if it’s not pulling timing or anything? I feel like I need to take it apart and do some cleaning first. __________________ - White 2018 GTR FBO+E85 - Check out my old build thread: Sway’s Journal-Hitomi ~Live and let live!~

04-02-2018, 10:44 AM	#12 (permalink)
Sway Track Member Join Date: Sep 2012 Location: TX Posts: 697 Drives: 2018 GTR Rep Power: 37871	Maybe I didn’t understand the question, the pcv is t’d in the front, those two lines connect into a line that runs to my in on my catch can, the out then connects to the directly to the back of the m370 manifold. Is that not correct? I’ll take pictures on my lunch break and post them. Edit: before, there was one single line that ran from the two t’d pcv valves, directly into the back of the manifold. I basically just put a catch can in the middle of that loop. __________________ - White 2018 GTR FBO+E85 - Check out my old build thread: Sway’s Journal-Hitomi ~Live and let live!~

04-02-2018, 08:12 PM	#14 (permalink)
-ZS-Carpenter A True Z Fanatic Join Date: Sep 2016 Location: Illinois Posts: 2,410 Drives: 13 370z 6MT Rep Power: 2684367	And isn't the admin catch can combo running all 4 vents to the cans? cap the intake and manifold ports, run both vents on the valve cover per side to the can then vented via filter? just like the 13th post here PCV Delete, Catch Cans, and Unmetered Air only I was going to use 2 cheaper cans......is that all wrong?!?

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