Catch Can INSTALLATION. The Final Debate. - 3000GT/Stealth International Message Center
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Old 01-24-2013, 08:26 AM   #1 (permalink)
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Arrow Catch Can INSTALLATION. The Final Debate.

Hey Guys,

So I read through TONS of old threads about catch can installs and it appears everyone has a different say on where to install these. I have yet to find a single distinct answer on what hose to install these on.

Using the graph below, please use the terminology in the picture so we all can be on the same page.

From what I read, some people use the PCV Valve > Catch Can & Lower Plenum > Catch Can.

I also read that some people leave the REAR VC TO INTAKE PIPE open with a breather and some say to connect that to a line to the ground under the car.

I am posting this because I want to finally install my catch can AND figure out what to do with that Rear VC to intake pipe since I will be ordering some Dejon pre-turbo pipes. I have a GM/MAF and MAFT 2.02 installed.

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Old 01-24-2013, 09:17 AM   #2 (permalink)
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Default Re: Catch Can INSTALLATION. The Final Debate.

the rear valve cover to breather goes to the catch can. simple enough

if you have more blowby than that can support then vent the valve cover cross over, fix your engine, or run less boost.
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Old 01-24-2013, 09:26 AM   #3 (permalink)
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Default Re: Catch Can INSTALLATION. The Final Debate.

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Originally Posted by Forest Gump View Post
the rear valve cover to breather goes to the catch can. simple enough

if you have more blowby than that can support then vent the valve cover cross over, fix your engine, or run less boost.
Okay I see. So pretty much the rear VC to intake will go to the catch can only.

Like mentioned before, there are a lot of different concepts on how to run a catch can which got me confused.

This is what CJByron has.

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Old 01-24-2013, 09:29 AM   #4 (permalink)
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Default Re: Catch Can INSTALLATION. The Final Debate.

the game changes when you are shooting for mid thirties boost
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Old 01-24-2013, 09:31 AM   #5 (permalink)
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Default Re: Catch Can INSTALLATION. The Final Debate.

Best recommendation I've seen is simply install the catch can inline with the current setup, catch can goes in the lines before they go into the intake(s)
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Old 01-24-2013, 09:33 AM   #6 (permalink)
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Default Re: Catch Can INSTALLATION. The Final Debate.

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Originally Posted by MichaelMR2 View Post
Best recommendation I've seen is simply install the catch can inline with the current setup, catch can goes in the lines before they go into the intake(s)
Yeah I was thinking of doing that but just installed my GM/MAFT, MAFT 2.02, SAFCII, etc. so I will be getting rid of the factory pre-turbo bubble pipes. I am ordering a set of Dejon pre-turbo pipes and was curious to know what to do to that rear vc to intake hose.
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Old 01-24-2013, 09:33 AM   #7 (permalink)
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Default Re: Catch Can INSTALLATION. The Final Debate.

Quote:
Originally Posted by Forest Gump View Post
the game changes when you are shooting for mid thirties boost
Thanks Forest. So one hose from Rear VC to Catch Can.
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Old 01-24-2013, 09:42 AM   #8 (permalink)
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Default Re: Catch Can INSTALLATION. The Final Debate.

that is the simpliest way. If you start to have issues after that then make changes then.
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Old 01-24-2013, 10:13 AM   #9 (permalink)
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Default Re: Catch Can INSTALLATION. The Final Debate.

off topic, which catch can are you using? Thanks
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Old 01-24-2013, 10:19 AM   #10 (permalink)
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Default Re: Catch Can INSTALLATION. The Final Debate.

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off topic, which catch can are you using? Thanks
Its not off topic

I am using the old box-style Greddy.

You can see it at the left. I have not installed it yet and its just sitting there for now.
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