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any disadvantage with a exhaust vacuum crank case vent?

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Old 01-04-2008, 05:50 PM
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Default any disadvantage with a exhaust vacuum crank case vent?

ok ive been doin some research and i have a bullet muffler so i dont have much back pressure. could i use my exhaust as a vacuum and run this via a T into both valve covers with a filter of some type to catch the oil, and maybe a one way valve just to be safe? would there be any disadvantages? and this is a lt1 if it makes a diffrence.
Old 01-04-2008, 07:35 PM
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Originally Posted by 4SFEDZ
ok ive been doin some research and i have a bullet muffler so i dont have much back pressure. could i use my exhaust as a vacuum and run this via a T into both valve covers with a filter of some type to catch the oil, and maybe a one way valve just to be safe? would there be any disadvantages? and this is a lt1 if it makes a diffrence.
If its a turbo car you'll end up spitting oil out the exhaust.....good for n/a though.
Old 01-04-2008, 09:42 PM
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Originally Posted by otherwhitemeat
If its a turbo car you'll end up spitting oil out the exhaust.....good for n/a though.
what if i got some type of filter to filter the oil out?
Old 01-04-2008, 09:54 PM
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Originally Posted by 4SFEDZ
what if i got some type of filter to filter the oil out?
If you find one let me know too.......I think it would get saturated way to fast and would be useless
Old 01-04-2008, 11:03 PM
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what bout this? http://app.infopia.com/Shop/Control/...d/0/rid/126348
Old 01-04-2008, 11:13 PM
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The vacuum signal would be ruined if you put a catch can inline between the valve cover and header. The header mounted evac systems dont pull much vacuum therefore any inline restriction would kill any benifits of it.
Old 01-05-2008, 01:08 PM
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so i could just use a baffle under the vc breather, that should work right?
Old 01-05-2008, 06:50 PM
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Yes, that would work if there is enough room. All you need is something to keep the oil from reaching the vacuum hose and being pulled into the exhaust system.

I would get some more feed back on doing this with 02 sensors before pulling the trigger, when I ran this set up it was on a 69 Camaro.
Old 01-06-2008, 01:04 AM
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come on guys there are some big dogs in here along with some sponsors that should no!!!
Old 01-11-2008, 06:59 PM
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so no one knows?
Old 01-12-2008, 04:06 PM
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I am currently testing this and show have some results here soon.

Keith
Old 01-13-2008, 04:37 PM
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sweet let me know, anyone else?
Old 01-13-2008, 05:08 PM
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you are better off running the pcv from the
driver side only or the ls6 type pcv it has the baffle,
where the passenger side does not and is
probably where most of the lost oil gets sucked up.
negative crank case pressure is good for power.




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