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'59Edsel
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Group: Forum Members
Last Active: 10 Years Ago
Posts: 163,
Visits: 3.5K
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I have a question. With this new pcv valve it seems my system is sucking less blow-by. I see some blow-by coming through my oil breather cap. Do you think the valve is worth having now? I made a video:
By the way, just curious what you guys think, I installed a better branded pcv, an ac delco, and my vacuum went down a bit. In order to bring it back up I sleeved the existing 5/16 hose with a smaller hose, and the put a vacuum restrictor into that. Still pulls a vacuum and bumped up the vacuum to about 18 inches. 
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'59Edsel
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Group: Forum Members
Last Active: 10 Years Ago
Posts: 163,
Visits: 3.5K
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Well its a no go. The increase is vacuum did not help my accelerating issue. I'll post more in the other thread.
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'59Edsel
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Group: Forum Members
Last Active: 10 Years Ago
Posts: 163,
Visits: 3.5K
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I've installed the 78 Fairmont pcv in my Edsel and my engine's vacuum is contestant at 17 inches of mercury. I will do a test drive this weekend. I do have one lingering concern though, as I rev at idle, it still feels like there is a slight hesitation at about 1600 or 1700 rpm. You can hear it in this video at about 02:16:
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lyonroad
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Group: Forum Members
Last Active: 10 Years Ago
Posts: 703,
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Cool. I just happen to have a chunk of hollow carbon fibre shaft that I found on a camping trip once. My wife asked why, as she always does, I was bringing that home, and I said as I always do. " It might come in handy some day".
Thanks.
Mark
1956 Mercury M100
1955 Ford Fairlane Club Sedan
Delta, British Columbia
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GREENBIRD56
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Group: Forum Members
Last Active: Last Year
Posts: 1.7K,
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Too many years have passed - I think it was a sawed off piece of hollow carbon fiber arrow shaft. Stuffed up into the hose out of sight - knee jerk response when I realized what the probem was for my lack of idle control. So ..... 5/32 maybe?
Steve Metzger Tucson, Arizona
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'59Edsel
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Group: Forum Members
Last Active: 10 Years Ago
Posts: 163,
Visits: 3.5K
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Thanks for the help everyone. I too would like to know what size restrictor would be good to start with. The only one I can find for sale is a Dorman 3/16. I will try a smaller pcv as well.
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lyonroad
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Group: Forum Members
Last Active: 10 Years Ago
Posts: 703,
Visits: 3.1K
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GREENBIRD56 (8/3/2014)
You can insert an orfice in the line to the valve and that will get you moving in the mean time. My outfit is using the valve for a 60's 292 truck and it is way too much flow when connected directly to the later style carb base port. But has worked fine after the orfice was installed in the hose.
Steve, as the restricter guru, what size orifice did you install?
Thanks.
Mark
1956 Mercury M100
1955 Ford Fairlane Club Sedan
Delta, British Columbia
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oldcarmark
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Group: Forum Members
Last Active: Yesterday
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'59Edsel (8/3/2014)
miker (8/3/2014)
Temporarily disconnect and plug the PCV connection. If the vacumn goes up, check which PCV valve you're using. A vacumn leak that size thru the valve would also answer the hesitation, as that much airflow (big vacumn leak) would cause a lean condition. I've done PCV valves into the manifold like that, but never saw such low vacuum. Run a search here, recommended PCV valves will show up. Most times, the valve runs either into the carb, or a drilled adaptor plate between it and the manifold.
Spell check doesn't seem to know how to spell vacumn? Vacuum? Should have paid more attention in school, I can't either.
You are spot on! I couldn't help myself and I went just now to go test your theory. I plugged the pcv valve with my finger and vacuum shot up to 17! Hooray! Now I just need to figure out which pcv valve I actually need. Thanks for your help! If you are using the type of PCV Valve that goes in a grommet in the Valley Cover I ended up using one for a 78 or so 4 Cylinder Fairmont/Zephyr.I first one I tried was for a 302 Ford and it was allowing too much Air at idle.Trial and error or try a restrictor as was suggested.
 
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GREENBIRD56
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Group: Forum Members
Last Active: Last Year
Posts: 1.7K,
Visits: 102.7K
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You can insert an orfice in the line to the valve and that will get you moving in the mean time. My outfit is using the valve for a 60's 292 truck and it is way too much flow when connected directly to the later style carb base port. But has worked fine after the orfice was installed in the hose.
Steve Metzger Tucson, Arizona
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'59Edsel
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Group: Forum Members
Last Active: 10 Years Ago
Posts: 163,
Visits: 3.5K
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miker (8/3/2014)
Temporarily disconnect and plug the PCV connection. If the vacumn goes up, check which PCV valve you're using. A vacumn leak that size thru the valve would also answer the hesitation, as that much airflow (big vacumn leak) would cause a lean condition. I've done PCV valves into the manifold like that, but never saw such low vacuum. Run a search here, recommended PCV valves will show up. Most times, the valve runs either into the carb, or a drilled adaptor plate between it and the manifold.
Spell check doesn't seem to know how to spell vacumn? Vacuum? Should have paid more attention in school, I can't either.
You are spot on! I couldn't help myself and I went just now to go test your theory. I plugged the pcv valve with my finger and vacuum shot up to 17! Hooray! Now I just need to figure out which pcv valve I actually need. Thanks for your help!
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