breathers, PCV bypass etc...
Originally Posted by See5
Sounds like a winner- just restrict the line to the intake so it just keeps the can vent from huffing.
I just found these and am going to start using them>
http://www.ovalcraft.com/catalog/ind...5a85afbfcad914
I just found these and am going to start using them>
http://www.ovalcraft.com/catalog/ind...5a85afbfcad914
Robert
I like the: http://www.ovalcraft.com/catalog/pro...5a85afbfcad914
but not sure how you are going to mount. Mounting to front of pass side head with spacer works.
but not sure how you are going to mount. Mounting to front of pass side head with spacer works.
Originally Posted by Stang's Bane
I have the GMPP valve covers like SLT does and this is what I was planning on doing. Drill a hole in the back of each of the valvecovers and T them together into a larger diameter line Run that line to a Catch-can and run a line from the catch can to to the Intake. The catchcan would have a breather in it. Does this sound like it would work. Motor details in sig. It is being built to be wound out to ~7200 peak.
You may have to fab some kind of baffle arond the holes in your valve covers... there is a lot of oil flying around in the valve covers..if you look at the stock valve cover you will see a lot of baffling... I was thinking about doing some plumbing myself in the beginning and decided on trying the breather with LS6 valley and PVC to see how it works..it seemed like the least complicated way to go ... so far I am happy with the results..I welded in a piece of aluminum as a baffle in the hole with the breather because I was getting too much oil in the breather off the the rockers..but the baffle cured that problem .. I wash out the breather with brake clean and compressed air about once a month ...
After much thought and agonizing, I am going to go with this:
Oil fill cap with an integral PCV-->-6an line to a tee fitting
LS6 valley cover PCV--> -6an line to the same tee
Tee fitting-10 an line to catch can with a breather cap in the top of it
Catch can -6an to Intake Manifold to provide slight vacuum.
Any opinions on how this will work??
Keith
Oil fill cap with an integral PCV-->-6an line to a tee fitting
LS6 valley cover PCV--> -6an line to the same tee
Tee fitting-10 an line to catch can with a breather cap in the top of it
Catch can -6an to Intake Manifold to provide slight vacuum.
Any opinions on how this will work??
Keith
TECH Senior Member
Joined: Apr 2002
Posts: 6,080
Likes: 17
From: So.Cal.
Originally Posted by Stang's Bane
I wonder about a fill cap with a PCV already in it????
Rubber grommet is GM 10198949.
PCV fits snug in rubber grommet; fuel hose fits over end of PCV.
To drill cap, I used a 3/4" woodborer and started on underside of cap;
insert grommet and test fit PCV...
if PCV won't go, remove grommet and lightly file hole;
repeat until PCV fits snug.
The line to the intake can be small because you only need ~1/8" bleed to keep from huffing.
If you have a vent on the breather cap and one on the can the one on cap will likely huff.
If you have a vent on the breather cap and one on the can the one on cap will likely huff.
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Originally Posted by See5
The line to the intake can be small because you only need ~1/8" bleed to keep from huffing.
If you have a vent on the breather cap and one on the can the one on cap will likely huff.
If you have a vent on the breather cap and one on the can the one on cap will likely huff.
Originally Posted by Stang's Bane
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post revival...
I have a amw catch can. IT has a filter built into the cover peice with a hole in the top of the cover and one hole in the side of the can. It works like a cylinder inside a cylinder The direction of flow is supposed to be in from top out the side to the intake. The hole in the side in bigger than the top hole. I have billet valve covers. They have a vent hole already tapped in the passenger side cover and uses a 3/8's id fuel line to connect to the tb. I get oil on my intake blade most likely from this vent line. Right now I pulled it off the TB and am running a sock over it til I figure this out, I dont want oil going into the fast 90 or on the tb blade.
My thought is this. Reverse the lines and run the vent line from the valve cover to the side of the catch. I have a $45 billet oil cap and am not in a hurry to drill and tap it. The valve cover is drilled and tapped. Cap the valley pan line, get rid of the pcv, and run a t on top of the catch can and run a small line from the T to the intake and put a breather on top of the tee. The intake line is for vacuum right? so if it draws from right under the breather on the t it shouldnt suck oil right? Even thought the flow is being reversed in the catch can?
I have a amw catch can. IT has a filter built into the cover peice with a hole in the top of the cover and one hole in the side of the can. It works like a cylinder inside a cylinder The direction of flow is supposed to be in from top out the side to the intake. The hole in the side in bigger than the top hole. I have billet valve covers. They have a vent hole already tapped in the passenger side cover and uses a 3/8's id fuel line to connect to the tb. I get oil on my intake blade most likely from this vent line. Right now I pulled it off the TB and am running a sock over it til I figure this out, I dont want oil going into the fast 90 or on the tb blade.
My thought is this. Reverse the lines and run the vent line from the valve cover to the side of the catch. I have a $45 billet oil cap and am not in a hurry to drill and tap it. The valve cover is drilled and tapped. Cap the valley pan line, get rid of the pcv, and run a t on top of the catch can and run a small line from the T to the intake and put a breather on top of the tee. The intake line is for vacuum right? so if it draws from right under the breather on the t it shouldnt suck oil right? Even thought the flow is being reversed in the catch can?
You really want an open breather with just enough vacuum (very restricted line) to intake so as to prevent huffing. The line to the intake can have a PCV check valve in it if you have one, so that when the can is pressurized under deceleration oil is not forced back.
The line from the valve cover should be as large as possible to keep velocity low.
The line from the valve cover should be as large as possible to keep velocity low.
I can take the filter element out of the can, its a brillo pad, and then it will be almost completly open except for the cylinder inside a cylinder effect but the botton is open on the inside cylider. I'm a little confused. Whats the direction of flow for the line to manifiold?
