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Fixed orifice PCV valve for MP cast aluminum valve cover #3061468
07/21/22 05:51 PM
07/21/22 05:51 PM
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tucson az
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frank Offline OP
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Using Mopar Performance cast aluminum valve covers on 511 build with Sniper. I have the correct PCV grommet for this valve cover but I can't locate a fixed orifice PCV valve that works with the grommet designed for this cover. The ID of the grommet is .470. I can't find any fixed orifice PCV valve for this application. Does anyone know where I can get the correct size valve for this application. Even an old style PCV valve would be OK. I know they can be modified into a fixed orifice type. Thanks
Frank

Re: Fixed orifice PCV valve for MP cast aluminum valve cover [Re: frank] #3061472
07/21/22 06:11 PM
07/21/22 06:11 PM
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Bend,OR USA
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I think a Ford type with the large metal bottom works scope
Sorry for not having a brand and part number shruggy


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Fixed orifice PCV valve for MP cast aluminum valve cover [Re: frank] #3061476
07/21/22 06:52 PM
07/21/22 06:52 PM
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The only fixed orifice PCV valves available are for Chevy applications so you have to modify the valve cover to work with a Chevy style fixed orifice PCV. In your case it might be easier to just make a fixed orifice restriction to go in the vacuum line from the valve cover to the intake manifold. Just plug the vacuum line and drill a 0.100 hole in the plug.

Re: Fixed orifice PCV valve for MP cast aluminum valve cover [Re: AndyF] #3061651
07/22/22 03:10 PM
07/22/22 03:10 PM
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frank Offline OP
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Thanks for your input
Frank

Re: Fixed orifice PCV valve for MP cast aluminum valve cover [Re: frank] #3061667
07/22/22 04:27 PM
07/22/22 04:27 PM
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I make my own fixed orifice valves (restrictions) for Mopars. Very simple job if you have a small tool room lathe. Just start with some bar stock and drill the center hole to what you need. Or drill and tap the center hole for a Holley jet so you can tune the vacuum signal.

Re: Fixed orifice PCV valve for MP cast aluminum valve cover [Re: AndyF] #3061672
07/22/22 05:08 PM
07/22/22 05:08 PM
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frank Offline OP
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Nice. Always wanted a lathe. This is turning into an expensive build.

Re: Fixed orifice PCV valve for MP cast aluminum valve cover [Re: AndyF] #3061758
07/23/22 04:05 AM
07/23/22 04:05 AM
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Originally Posted by AndyF
I make my own fixed orifice valves (restrictions) for Mopars. Very simple job if you have a small tool room lathe. Just start with some bar stock and drill the center hole to what you need. Or drill and tap the center hole for a Holley jet so you can tune the vacuum signal.


That's a great idea! up

Last edited by SNK-EYZ; 07/23/22 04:06 AM.

Kayse can't keep up at all now. lol
Re: Fixed orifice PCV valve for MP cast aluminum valve cover [Re: SNK-EYZ] #3061911
07/23/22 06:34 PM
07/23/22 06:34 PM
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Originally Posted by SNK-EYZ
Originally Posted by AndyF
I make my own fixed orifice valves (restrictions) for Mopars. Very simple job if you have a small tool room lathe. Just start with some bar stock and drill the center hole to what you need. Or drill and tap the center hole for a Holley jet so you can tune the vacuum signal.


That's a great idea! up


Here are a couple of pictures of the fixed orifice that I use on my Coronet. This is fancier that required but it provides an idea. I drill and tap these blocks for Holley air bleeds but Holley jets would also work.

DSC_4982 (Large).JPGDSC_4986 (Large).JPG






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