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Old 03-15-2010, 09:59 AM
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Default Valve cover breather question

Whats the best way to get the pressure out. Ive seen alot of breathers that are plumbed to the air cleaner my past 3 boats have been this way. Is there any better way please post pics and comments
Thanks
-Mike
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Old 03-15-2010, 11:17 AM
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Originally Posted by Sick Stinger
Whats the best way to get the pressure out. Ive seen alot of breathers that are plumbed to the air cleaner my past 3 boats have been this way. Is there any better way please post pics and comments
Thanks
-Mike
heres somthine to read about,works grear on our race cars but yet to try it in a boat, i thought about running it off of one engine and plumbing it to both engines..

http://www.dragstuff.com/techarticles/vacuum-pumps.html
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Old 03-15-2010, 03:44 PM
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I've been thinking about this for a while. I added simple K&N style Rocker breathers while waiting on the billet tall breathers. I've also seen boats with both rockers plumbed to a central puke tank which has a filtered vent.
Plumbing back to the air intake is the environmentally friendly way to go which came from the way auto manufacturers had to do it. I've often wondered if any one way or combo helps with crankcase pressure and breathing ability more or less.
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Old 03-15-2010, 07:56 PM
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I have found that simply putting a pair of breathers in the valve covers can allow some oil to leak out of them during a hard run. No big deal or big lose of oil, just enough to be a nuisance and a mess. Plumbing to the flame arrester didnt make any sense to me. The thought of allowing hot, oil soaked air into my intake, just doesnt sit right with me. My solution was to plumb both valve covers to an Imco vented puke tank. Worked out great. Leaks are gone.
I dont have a good picture, but this should show the general idea..
Attached Thumbnails Valve cover breather question-p7140182.jpg  

Last edited by Vinny P; 03-15-2010 at 08:02 PM.
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Old 03-17-2010, 11:37 AM
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Vin thats what i was thinking about doing i would say it does work better and also that same idea of hot oil and air going back into the chamber just doesnt sit rite with me.
-Mike
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Old 03-17-2010, 12:23 PM
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What about running a PCV valve, using intake manifold vacuum.
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Old 03-17-2010, 01:30 PM
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Originally Posted by mrfixxall
heres somthine to read about,works grear on our race cars but yet to try it in a boat, i thought about running it off of one engine and plumbing it to both engines..

http://www.dragstuff.com/techarticles/vacuum-pumps.html
One vac pump for both engines is what we do. It is a great solution but it is pretty pricey.
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