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Valve cover breathers

June 4 2013 at 10:32 PM

Gord  (Login 66birdman)
Members

Just wondering on a '74 390 can I use air breathers on both valve covers or do I need to use PCV valve ? I am running Edelbrock heads and performer RPM manifold..

 
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JC DeSaveur
(Login 73F-100)
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You can but I wouldn't recommend it

June 4 2013, 10:43 PM 

The benefits of running a PCV valve far outweigh not running one. Run one breather and a PCV.

 
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Anonymous
(Login 391locker)
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Re: Valve cover breathers

June 5 2013, 4:01 AM 

The engine will last longer and your engine compartment wont end up with an oily mess if you use pcv.

 
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doug smith
(Login cjshaker)
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Re: Valve cover breathers

June 5 2013, 7:16 AM 

If you drive it in all kinds of weather you will definately be better of keeping a PCV. If it's strictly a nice weather driver, you can get away fine without one.

And a .99 cent wristband from your local sports store makes excellent breather "filters" that will keep any oil residue from making a mess. Just pop it around the breather. Replace it as needed, about every 1-2yrs. You can even color match to your engine. Of course I always use blue.

Doug
----------------------
photo mycar1-1.jpg photo DSCF0029800x600-1.jpg
69 Mach 1 R-code - 427MR 4-spd
68 F-250 4wd - 390HP 4-spd
58 2dr Del Rio Wagon - 390 4-spd
65 Galaxie 500 2dr hrdtp - 390 (automatic sad.gif )
53 F-1 239ci flathead 3-spd
09 Mustang GT 4.6 5-spd

 
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Dave Eames
(Login DEames)
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Buy a breather can with PCV

June 5 2013, 7:40 AM 

grommet and you can plumb-in a PCV valve circuit; easy-squeezy dealy.
Eames.

 
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Falcon67
(Login Falcon67)
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PCV on one cover, filtered breather on the other

June 5 2013, 8:33 AM 

only proper way to do it.

1967 Falcon 4 door 351C-4V
1970 Mustang 351C-2V
http://raceabilene.com/kelly/hotrod
Owner built, owner abused.

 
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Commish10
(Login Commish10)
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Where does the PCV hose connect to?

June 5 2013, 10:55 AM 

The manifold? I dont think my RPM intake has a provision for it.

 
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JC DeSaveur
(Login 73F-100)
Members

You could get one machined in the blank boss behind the carb (N/M)

June 5 2013, 12:35 PM 


 
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Falcon67
(Login Falcon67)
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Intake, carb or carb spacer

June 5 2013, 7:30 PM 

If there's not a hole, make it happen. Drill and tap for a 1/4" NPT x 3/8 barb fitting to hook up a 3/8 hose. The PCV connects to manifold vacuum.

1967 Falcon 4 door 351C-4V
1970 Mustang 351C-2V
http://raceabilene.com/kelly/hotrod
Owner built, owner abused.

 
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Gord
(Login 66birdman)
Members

Re: Intake, carb or carb spacer

June 5 2013, 9:49 PM 

Can I hook it up to the air cleaner ?

 
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