PCV Valve specs

[PaulProe]

Has anyone ever found a site that gives spec's on the various PCV valves? Searching the Ford parts books and other resources, it looks as if the part number differences are based more on physical attributes (straight, elbow, size of hose connection, threaded). I don't see any reference to the port sizes or spring sizes, transition vacuum, etc.

Example, per the Ford parts book, the same PCV valve is used on a 289, 289 HiPo, 390 and 427, along with others. I'll guarantee the idle points and vacuum ranges is different on each of these engines.

The Wagner adjustable PCV is a great idea but very pricey. You can do a lot of part swapping for what they get for one, but where to start?

Paul

[Falcon67]

When I ran PCV valves on my engines, I bought the ones that fit the hole and had a 90 degree bend with a 3/8" hose bib.  Nothing more technical than that.  Walmart, or parts store, usually.  Never had an issues with any of them.

[Drew Pojedinec]

I just stuff a restriction in the hose, cuz I’m thrifty like that. Plus it’s nice that you can adjust the size to suit your needs.
#grassroots
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[machoneman]

I just stuff a restriction in the hose, cuz I’m thrifty like that. Plus it’s nice that you can adjust the size to suit your needs.
#grassroots
#VisitMyTouTubeChannel

Same here. Start with a OEM Ford PCV valve (289 and any V-8 up to a 429) and stuff something in the line, drilled to a .10 size. Go down in the drill size if need be. Cheap and effective!

[My427stang]

Only one I ever saw cause a problem was on Brent’s Junky Junk with the sewer size stock hose. In retrospect it had to be bad too because it should be closed at WOT, but I have not seen any difference. I like them too, in a car that runs part throttle or on and off most of the time, hard to beat