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Old 10-13-2019, 09:43 AM   #1076
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Quick question. What do you guys do with your pcv valve? Where did you route it? Also the iacv where did you route those hoses?
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Old 10-13-2019, 01:06 PM   #1077
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Quote:
Originally Posted by b005t3drsx View Post
Quick question. What do you guys do with your pcv valve? Where did you route it? Also the iacv where did you route those hoses?
I took a slightly different approach to still satisfy the original intent of the system.

From the PCV, mine goes to a catch can. From the catch can, I have a tee and it goes to the original intake manifold port and the compressor inlet. On each of those two lines, I have a PCV system rated check valve (UPR check valve).

Doing it the way I did ensures that there will always be a pressure differential supporting crankcase ventilation (IM at low RPM, and compressor inlet at higher RPM). The two check valves essentially turn off whichever side is helping less or hurting it, such as the IM under boost.


IACV hoses? Do you mean the coolant lines for the throttle body heater in the IACV? If so, you can typically skip those in climates that donít frequently see freezing temps. I bypassed mine so that I could use those ports for water cooling the turbo. My IACV lines are just open, but I probably should have capped them to make sure it doesnít rust or anything inside it.
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Old 10-13-2019, 01:40 PM   #1078
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Quote:
Originally Posted by claymiester View Post
I took a slightly different approach to still satisfy the original intent of the system.

From the PCV, mine goes to a catch can. From the catch can, I have a tee and it goes to the original intake manifold port and the compressor inlet. On each of those two lines, I have a PCV system rated check valve (UPR check valve).

Doing it the way I did ensures that there will always be a pressure differential supporting crankcase ventilation (IM at low RPM, and compressor inlet at higher RPM). The two check valves essentially turn off whichever side is helping less or hurting it, such as the IM under boost.


IACV hoses? Do you mean the coolant lines for the throttle body heater in the IACV? If so, you can typically skip those in climates that don’t frequently see freezing temps. I bypassed mine so that I could use those ports for water cooling the turbo. My IACV lines are just open, but I probably should have capped them to make sure it doesn’t rust or anything inside it.
Can you post some pics?

My issue is I don't have stock IM port because I went with a Skunk2 Manifold. Okay ill cap my iacv port.
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Old Yesterday, 12:21 PM   #1079
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These pics don't show all of it, but maybe they help? (Disclaimer - these pics were when I was test fitting it, so some of my misc. hoses aren't fully connected yet)

The hose connecting to the PCV system runs across the front into the catch can, and the large brass tee on the outlet of the catch can is the tee I referred to. There's another small tee you can see in there, but that's unrelated to the PCV system - IIRC it's for the BOV, since I can't exactly tap a hole in my plastic manifold and needed another IM reference line.



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Old Yesterday, 12:31 PM   #1080
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Quote:
Originally Posted by claymiester View Post
These pics don't show all of it, but maybe they help? (Disclaimer - these pics were when I was test fitting it, so some of my misc. hoses aren't fully connected yet)

The hose connecting to the PCV system runs across the front into the catch can, and the large brass tee on the outlet of the catch can is the tee I referred to. There's another small tee you can see in there, but that's unrelated to the PCV system - IIRC it's for the BOV, since I can't exactly tap a hole in my plastic manifold and needed another IM reference line.



Wow. yeah that helps and makes me more confused lol. I'm going to have to take some pictures of what i'm confused on and maybe you guys could help.
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Old Yesterday, 01:16 PM   #1081
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Alright, how about a diagram? Taken from the PCV system description in the Helms.

Number 20 is the PCV valve. I have a hose going to my catch can.

On the catch can, I have a tee which leads to two outlet hoses. Each of these outlet hoses has a check valve that only allows flow away from the catch can.

When idling, the IM is the highest vacuum, so the CV closest to the IM is open, which closes the CV on the compressor inlet side.

When under boost, the positive pressure closes the IM CV, and the compressor inlet is generating a stronger vacuum to pull air through the catch can.

Also of note, the PCV valve is never truly closed, whereas the check valves can be. Honda designed the PCV valve to "leak" and essentially allow airflow both directions, with the predominate airflow of course being to vent towards the intake manifold.

Many people tackle this different ways, but this is the way I felt satisfied the original intent of the factory system.

For reference, I didn't include the BOV portion in this. I did include the valve cover vent method I chose, though. This is the hose you can see in my second picture with the 90į bend.

Hope this helps!

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Old Yesterday, 01:18 PM   #1082
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Quote:
Originally Posted by b005t3drsx View Post
Quick question. What do you guys do with your pcv valve? Where did you route it? Also the iacv where did you route those hoses?
Drill it and tap it 3/8 npt and run it to catch can and empty it like a man in the driveway every 1k miles or so.
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Old Yesterday, 06:49 PM   #1083
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Drill it and tap it 3/8 npt and run it to catch can and empty it like a man in the driveway every 1k miles or so.
lmao i just drilled mine and had a filter on it lmao
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Old Yesterday, 07:56 PM   #1084
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lmao i just drilled mine and had a filter on it lmao
I think that's what I am going to do for now. Got to much other crap to work on.
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Old Today, 01:30 PM   #1085
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yeah I got rid of the PCV valve and just put an open nipple fitting on it and ran it to my catch can.
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