Proper PCV Setup
Thread Starter
Instructor
Joined: Apr 2005
Posts: 130
Likes: 0
From: Drasco Arkansas
Proper PCV Setup
I've seen in a couple of threads the mention of inadequate PCV setup causing engine failure on FI motors. What is considered a proper setup. I have the line that went to the intake going to the air filter.
Burning Brakes
Joined: Oct 2004
Posts: 925
Likes: 0
From: Johnston, Iowa
Posted elsewhere, do a search here @ CF for "McMaster"...
http://www.mcmaster.com/
search for "7775 K52" on mcmaster's site. ~ $12.16 plus shipping. Then add a couple of brass barbs to it.
Place the check valve inline with your pcv system (and between your catch can if you have one.) Make sure the valve is oriented so that boost from the intake cannot be forced into the valve covers.
http://www.mcmaster.com/
search for "7775 K52" on mcmaster's site. ~ $12.16 plus shipping. Then add a couple of brass barbs to it.
Place the check valve inline with your pcv system (and between your catch can if you have one.) Make sure the valve is oriented so that boost from the intake cannot be forced into the valve covers.
Burning Brakes
Joined: Jan 2005
Posts: 1,066
Likes: 2
From: fort worth texas
Originally Posted by mwbmd11
I've seen in a couple of threads the mention of inadequate PCV setup causing engine failure on FI motors. What is considered a proper setup. I have the line that went to the intake going to the air filter.
same here...
curious(sp?)
Melting Slicks
Joined: Mar 2002
Posts: 2,931
Likes: 2
From: Tx
There is more to it than a check valve. It basically needs to also vent under boost.
There have been a ton of threads on it and I have spent time creating detailed diagrams, taking pictures..., but the forum search feature sucks so bad that I can't find any of them.
This site is run very poorly from a search persepctive. You sponsers need to get on them.
There have been a ton of threads on it and I have spent time creating detailed diagrams, taking pictures..., but the forum search feature sucks so bad that I can't find any of them.
This site is run very poorly from a search persepctive. You sponsers need to get on them.
Supporting Vendor
Joined: Jul 2003
Posts: 6,486
Likes: 2
From: http://www.mphparts.com 800-364-1975
Originally Posted by QuickSilver2002
This site is run very poorly from a search persepctive. You sponsers need to get on them.
Melting Slicks
Joined: May 2003
Posts: 2,100
Likes: 52
From: Massapequa Park, NY [This is Not an EXIT]
Originally Posted by QuickSilver2002
There is more to it than a check valve. It basically needs to also vent under boost.
There have been a ton of threads on it and I have spent time creating detailed diagrams, taking pictures..., but the forum search feature sucks so bad that I can't find any of them.
.
There have been a ton of threads on it and I have spent time creating detailed diagrams, taking pictures..., but the forum search feature sucks so bad that I can't find any of them.
.
this is something I've been trying to get good info on but cant find much through a search 
Team Owner
Joined: Jul 2003
Posts: 20,474
Likes: 2
From: Detroit
Burning Brakes
Joined: Jan 2005
Posts: 1,066
Likes: 2
From: fort worth texas
Originally Posted by mdhmi
very nice
thanks
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Melting Slicks
Joined: Mar 2002
Posts: 2,931
Likes: 2
From: Tx
Originally Posted by bernrex
I've looked over the thread mdhmi linked us to.
Looks like this would be needed only if we boost above say 8 lbs....
Do I infer correctly about critical pressure @ 8 or above ?
Looks like this would be needed only if we boost above say 8 lbs....
Do I infer correctly about critical pressure @ 8 or above ?
I've seen it be a major issue at 8psi.
Former Vendor
Joined: Oct 2004
Posts: 2,592
Likes: 0
From: FI Performance : Norwalk Connecticut www.FIPERFORMANCE.com
Originally Posted by denscor
What are the kits going to cost? And how soon will they be ready?
Brian
Pro
Joined: Apr 2001
Posts: 589
Likes: 0
From: Torrance CA
Originally Posted by QuickSilver2002
It is a potential problem with just about any boost level, but the issue becomes more serious as boost and blowby increase.
I've seen it be a major issue at 8psi.
I've seen it be a major issue at 8psi.
If I remember correctly you have that trick little K&N filter on your valve cover port. If so were did you get it. I'm not refering to a breather on the oil fill cap.
Pro
Joined: Aug 2004
Posts: 596
Likes: 0
From: PA
Originally Posted by QuickSilver2002
It is a potential problem with just about any boost level, but the issue becomes more serious as boost and blowby increase.
I've seen it be a major issue at 8psi.
I've seen it be a major issue at 8psi.
I saw your diagram of the system you made.
What kind of restrictor valve do you use for your fresh air intake into the crankcase?
Thank you,
Chris
Melting Slicks
Joined: Sep 2002
Posts: 2,366
Likes: 0
From: Chandler Az
St. Jude Contributor
Originally Posted by hpcubed
Quicksilver,
If I remember correctly you have that trick little K&N filter on your valve cover port. If so were did you get it. I'm not refering to a breather on the oil fill cap.
If I remember correctly you have that trick little K&N filter on your valve cover port. If so were did you get it. I'm not refering to a breather on the oil fill cap.
Kevin
Safety Car
Joined: Aug 2004
Posts: 4,067
Likes: 62
From: Houston Texas
From my research this is the best way to vent the pressure, I know this is a diagram for a 3000gt, but it is the same principle. Run the small one way Krank vent from the PCV to the manifold, and the larger KV tie in both valve covers to the KV and then to a catch can. It will allow pressure out under boost, and keep vaccum in during normal driving.
http://www.stealth316.com/2-krankvents.htm
http://www.stealth316.com/2-krankvents.htm
Last edited by vertC6; Mar 13, 2006 at 01:15 AM.
