Catch Can Setup
Thread Starter
Joined: Aug 2003
Posts: 114
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From: Pleasant Hill, Ca, USA
Catch Can Setup
Well, I am still confused on what catch can setup to run. Even after reading many a threat after thread, of ppl arguing and presenting different views. What I have gathered from these threads is a knowledge of how the PCV system works. I have a setup in mind that I wanna try but I wanna run it thorugh you guys first to see if you can pick out major problems or inneficiencies...
Would this setup work (Street Setup not Race)?
This would be normal driving and Idle:
This would be hard driving:
P.S. I want a closed loop system. Im in cali, and i dont particularly like sludge buildup in my engine bay or being able to smell oil fumes etc...
Would this setup work (Street Setup not Race)?
This would be normal driving and Idle:
This would be hard driving:
P.S. I want a closed loop system. Im in cali, and i dont particularly like sludge buildup in my engine bay or being able to smell oil fumes etc...
Honda-Tech Member
Joined: Jun 2001
Posts: 7,261
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From: Northern, VA
Re: Catch Can Setup (Kack)
That looks right, but I wonder if anyone can confirm if there is enough vacuum at the turbo inlet under high load conditions? Would it depend on the size of the turbo inlet piping?
Member
Joined: Apr 2002
Posts: 1,842
Likes: 1
From: Somewhere in, FL, USA
Re: Catch Can Setup (Kack)
I am currently running tests the pvc system ... and I don't want to speculate before all the data is gathered and analyzed.... I'll post the results when I'm done(few weeks).
Here was one of my first tests done....
https://honda-tech.com/zerothread?id=697498
more on the way
Modified by dasher at 10:06 AM 12/16/2003
Here was one of my first tests done....
https://honda-tech.com/zerothread?id=697498
more on the way
Modified by dasher at 10:06 AM 12/16/2003
Member
Joined: Apr 2002
Posts: 1,842
Likes: 1
From: Somewhere in, FL, USA
Re: Catch Can Setup (Kack)
some comments however....
---I don't like how you use a single catchcan for both the valve cover breather line and the PVC line running to the crankcase. During idle and low load situations the valvecover breather line will want to draw in air and the PVC line is trying to evacuate blowby. The flow differentiation under these conditions will cause alot of turbulence inside that single catchcan. Another concern I have is that you will be recyling some of those unburnt fuels and throwing them back in the valve cover at low load/idle conditions.
--. Simplify your setup, eliminate the line going to the Intake manifold... not needed because you can use the intake (pre-turbo) as the source of vacuum.
--- I am not terribly happy with dumping all those oil vapors and unburnt fuels into the turbo.... but you have to do it because you said that you need a closed system which makes things a bit harder.
Here is a better Idea.... but will require some work.
Instead of throwing oil vapors/ unburnt fuel after the intake filter -- throw them in before the Filter!
You will need to construct a sealed chamber around the filter and have a large duct to feed it from an airsource outside the engine bay.
Here are the lines you would want to plumb inside this chamber you created.
So the lines will run as follows :
Line 1 : Slashcut tube in filter chamber(facing airflow) ---- Tube going to Catchcan ---Catchcan A --- tube going to valve cover breather.
Line 2 : Slashcut tube in filter chamber(facing away from airflow to provide vacuum) --- tube going to catchcan -- catchcan B --- tube going to crankcase
Plug the hole in the Inatke manifold and Don't use the PCV valve in this setup.
This arrangements allows you:
1)Completely closed system with no leak in blowby.
2)Allows for you to help direct cooler air outside the engine bay into the intake.
3)Uses both a catchcan and a filter to "catch" those oil vapors/ unburnt fuel before the turbo.
4)Simple to clean the K+N more often.
If you only want to use 1 catchcan then you can simply eliminate catchcan A. It is also extremley important that you have large ducting feeding the Filter chamber otherwise you will restrict the airflow.
---I don't like how you use a single catchcan for both the valve cover breather line and the PVC line running to the crankcase. During idle and low load situations the valvecover breather line will want to draw in air and the PVC line is trying to evacuate blowby. The flow differentiation under these conditions will cause alot of turbulence inside that single catchcan. Another concern I have is that you will be recyling some of those unburnt fuels and throwing them back in the valve cover at low load/idle conditions.
--. Simplify your setup, eliminate the line going to the Intake manifold... not needed because you can use the intake (pre-turbo) as the source of vacuum.
--- I am not terribly happy with dumping all those oil vapors and unburnt fuels into the turbo.... but you have to do it because you said that you need a closed system which makes things a bit harder.
Here is a better Idea.... but will require some work.
Instead of throwing oil vapors/ unburnt fuel after the intake filter -- throw them in before the Filter!
You will need to construct a sealed chamber around the filter and have a large duct to feed it from an airsource outside the engine bay.
Here are the lines you would want to plumb inside this chamber you created.
So the lines will run as follows :
Line 1 : Slashcut tube in filter chamber(facing airflow) ---- Tube going to Catchcan ---Catchcan A --- tube going to valve cover breather.
Line 2 : Slashcut tube in filter chamber(facing away from airflow to provide vacuum) --- tube going to catchcan -- catchcan B --- tube going to crankcase
Plug the hole in the Inatke manifold and Don't use the PCV valve in this setup.
This arrangements allows you:
1)Completely closed system with no leak in blowby.
2)Allows for you to help direct cooler air outside the engine bay into the intake.
3)Uses both a catchcan and a filter to "catch" those oil vapors/ unburnt fuel before the turbo.
4)Simple to clean the K+N more often.
If you only want to use 1 catchcan then you can simply eliminate catchcan A. It is also extremley important that you have large ducting feeding the Filter chamber otherwise you will restrict the airflow.
Honda-Tech Member
Joined: Feb 2003
Posts: 3,219
Likes: 0
From: Oregon
Re: Catch Can Setup (dasher)
I don't think it would be a good idea to go in before the filter.. Any oil accumulation on the outer part of the filter will be a magnet for dirt.. even though the filter will catch it. Just my $.02
Member
Joined: Apr 2002
Posts: 1,842
Likes: 1
From: Somewhere in, FL, USA
Re: Catch Can Setup (5thgencivic)
their is alot of surface area on the filter, it won't be coated that quickly... you would have to clean the filter every 1-2 months ...
but thats the whole Idea I'm proposing... Id much rather spend 15 minutes cleaning the filter more often then having all that contamination enter my incoming air, which decreases reliability of your turbo, engine, and make you more prone to detonation...
its your choice however.... keep in mind that I am proposing this setup to someone who needs to maintain a closed system ... If given the choice I would go with another setup with an open PCV system
but thats the whole Idea I'm proposing... Id much rather spend 15 minutes cleaning the filter more often then having all that contamination enter my incoming air, which decreases reliability of your turbo, engine, and make you more prone to detonation...
its your choice however.... keep in mind that I am proposing this setup to someone who needs to maintain a closed system ... If given the choice I would go with another setup with an open PCV system
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