Best PCV catch can design?

adampecush

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May 11, 2006
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heh, yep, we posted at the same time.

even with a check valve on the intake manifold outlet, you'd still be sucking dirty crankcase air through the turbo under boost.
 

QWIKSTRIKE

475rwhp459torq an climbin
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90T04;959616 said:
I think im going to do it that way too since I have a ffi. So what size is your port in the intake manifold providing the vacuum? The stock system does not incorporate a pcv valve, instead it has a metered hole in the TB for a vacuum source, correct? And if I understand correctly, your PCV valve is also whats protecting the crankcase from boost pressure, and thats where your hose to the turbo inlet takes over?

edit: like this:
p959957_1.jpg


This is quite accurate and you are the prize winner. I also have a PCV can in between the turbo intake as well:naughty: The vaccum line is a 1/4 vacuum feed. The line you have going to the turbo intake I have feeding to another catch can, and continuing from the catch can going to the turbo intake. Dean Marcum shared with me that his is set up simularly.
 
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QWIKSTRIKE

475rwhp459torq an climbin
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adampecush;959872 said:
I think you're defeating the purpose of the catch can like that. Under boost, the catch can will be inoperable, no? Someone correct me if I'm wrong.


This is why I am using 2 catch cans, and the PCV valve has a check valve in it that keeps the boost from coming out of the intake under boost conditions. The second catch in between the turbo and the valve cover which is on the turbo side takes over when the first catch can is blocked by the check valve in the PCV valve. This works perfectly, and I dare any genius to prove it won't.;):biglaugh::naughty: I have a clean intake and a clean turbo intake pipe as well. I don't lose boost pressure when boosting because the pcv valve keeps the intake pressurized under boost. This designed is tested and also approved by the great chevyeater who is the best emissions specialist on these forums that I pesronally know of. Emissions testing, and diagnosis was one of his specialties when working for chevy.:biglaugh:
 
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QWIKSTRIKE

475rwhp459torq an climbin
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QWIKSTRIKE;953168 said:
I functionally have 2 catch cans. One vacuum line off the back of the FFI going to the left side of the catch can, and the other port going to a PCV valve thats in between the hose, and the metal tube coming from the valve covers. The end of the pcv pipe that went to the turbo intake is going to one side of a catch can, and the other to the in port of the turbo completing the total catch can solution.

You guys forgot to read the full statement about my 2 catch can design. My second can is installed where the stock intake box was on the front radiator support, and feeds in between the turbo and Valve covers before feeding the pcv valve with the check valve in it, which continues to the catch can which then feeds into the intake which is the main vauum source under normal driving. Under boost the first catch can off of the intake has a pcv check valve in it which closes, and the catch can before the turbo thats plumbe to the other end of the check valve now takes over when boosting under presure
 
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adampecush

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QWIKSTRIKE;959980 said:
This is why I am using 2 catch cans, and the PCV valve has a check valve in it that keeps the boost from coming out of the intake under boost conditions. The second catch in between the turbo and the valve cover which is on the turbo side takes over when the first catch can is blocked by the check valve in the PCV valve. This works perfectly, and I dare any genius to prove it won't.;):biglaugh::naughty: I have a clean intake and a clean turbo intake pipe as well. I don't lose boost pressure when boosting because the pcv valve keeps the intake pressurized under boost. This designed is tested and also approved by the great chevyeater who is the best emissions specialist on these forums that I pesronally know of. Emissions testing, and diagnosis was one of his specialties when working for chevy.:biglaugh:

I was referring to the diagram, not your setup.
 

QWIKSTRIKE

475rwhp459torq an climbin
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starscream5000;959852 said:
^ I don't need no stinkin' catch can! ;)



I was told by an emissions specialist that the pcv on an engine is desgined to add equilibrium to the driveabilty of the engine. Much like a boiler system the engine needing equal pressure on the inside of the motor like that on the out side to keep a balance. This equilibrium of pressure helps the rings to seat. Without the pcv set up properly it can be hard on the engine, seals and ring seating. But hey what do I know.
 

starscream5000

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QWIKSTRIKE;960307 said:
[/B]


I was told by an emissions specialist that the pcv on an engine is desgined to add equilibrium to the driveabilty of the engine. Much like a boiler system the engine needing equal pressure on the inside of the motor like that on the out side to keep a balance. This equilibrium of pressure helps the rings to seat. Without the pcv set up properly it can be hard on the engine, seals and ring seating. But hey what do I know.

Qwik,

My response was in regards to what Ian said, you know that, right?
 

QWIKSTRIKE

475rwhp459torq an climbin
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starscream5000;961030 said:
Qwik,

My response was in regards to what Ian said, you know that, right?

Yep I wasn't singling you out Starscream I saw your quote and funny sarcastic retort, but just throwing some information out there for the one who's out there with the lights on and no one's home. I know you know what I mean;) in the case that someone may try to go literal with that thought. Then I ended with my own sarcasm about what do I know. So if I crossed you with my retort I appologize, because I am a big fan o yours and your contributions. Most of you ol timers know your stuff it's the new guys that scare me.....lol:naughty::biglaugh::aigo::nono:
 
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IJ.

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Brent: My motor doesn't breath all that hard so I have -10 lines back to in between the Turbo and air cleaner.

Any crap that comes out of the Motor is clean enough to be burned so I'm not overly concerned with catching it.
 

MK3Brent

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IJ.;961434 said:
Brent: My motor doesn't breath all that hard so I have -10 lines back to in between the Turbo and air cleaner.

Any crap that comes out of the Motor is clean enough to be burned so I'm not overly concerned with catching it.

Yeah, I put mine back into the intake to see... and sure enough, it's clean.
I'm just going to keep it this way.

Thanks for the info.
 

starscream5000

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QWIKSTRIKE;961397 said:
Yep I wasn't singling you out Starscream I saw your quote and funny sarcastic retort, but just throwing some information out there for the one who's out there with the lights on and no one's home. I know you know what I mean;) in the case that someone may try to go literal with that thought. Then I ended with my own sarcasm about what do I know. So if I crossed you with my retort I appologize, because I am a big fan o yours and your contributions. Most of you ol timers know your stuff it's the new guys that scare me.....lol:naughty::biglaugh::aigo::nono:

Nah, I'm not that old! :)