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Old 05-22-2020, 03:11 AM   #101
jrvariel48
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Default Re: Opinion on PCV valve for flathead?

Which PCV valve are you guys using on your set up??
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Old 05-22-2020, 09:51 AM   #102
glennpm
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Default Re: Opinion on PCV valve for flathead?

You need to pick a PCV valve made that is close to your engine displacement. I use one for a 1990 Plymouth Voyager 3.0L or 181cid, V6. The number is PCV333. I went smaller and this works well for me. No oil mist on firewall and didn’t affect my carbs. I have two 97s and 269cid on a 59A.

Last edited by glennpm; 05-22-2020 at 10:04 AM.
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Old 05-22-2020, 03:36 PM   #103
jrvariel48
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Default Re: Opinion on PCV valve for flathead?

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You need to pick a PCV valve made that is close to your engine displacement. I use one for a 1990 Plymouth Voyager 3.0L or 181cid, V6. The number is PCV333. I went smaller and this works well for me. No oil mist on firewall and didnít affect my carbs. I have two 97s and 269cid on a 59A.
Great! Thanks, I'll have to do a little searching!
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Old 09-27-2020, 02:11 PM   #104
eicke
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Default Re: Opinion on PCV valve for flathead?

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Originally Posted by glennpm View Post
You need to pick a PCV valve made that is close to your engine displacement. I use one for a 1990 Plymouth Voyager 3.0L or 181cid, V6. The number is PCV333. I went smaller and this works well for me. No oil mist on firewall and didnít affect my carbs. I have two 97s and 269cid on a 59A.
Any pics of this install? Just wonderin' which direction the PCV goes.
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Old 09-27-2020, 03:00 PM   #105
glennpm
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Default Re: Opinion on PCV valve for flathead?

Yes I do! Also look at this post listing a horizontal mounted PCV for a small block Chevy, if you want a larger one than I used:

https://www.jalopyjournal.com/forum/...#post-12322077


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Old 09-27-2020, 04:06 PM   #106
eicke
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Default Re: Opinion on PCV valve for flathead?

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Thanks, Glenn! I thought about drilling the manifold in the same spot as yours as mine also has access in tis location.
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Old 09-27-2020, 05:31 PM   #107
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Default Re: Opinion on PCV valve for flathead?

Good, glad I could help you!
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Old 09-29-2020, 09:36 AM   #108
markdtn
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Default Re: Opinion on PCV valve for flathead?

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Which PCV valve are you guys using on your set up??
The vacuum port just below the carb on an iron 8BA intake uses 7/16 banjo threads. I bought a GM disc brake 7/16 banjo bolt and a 7/16 banjo to 3/8 hose barb fitting (AKA 12mm banjo x 10mm barb). I am using a Motorcraft EV68 PCV valve and a Dorman/Help 42052 Grommet in the road draft hole.
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Old 09-29-2020, 03:20 PM   #109
1948F-1Pickup
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Default Re: Opinion on PCV valve for flathead?

My port below the carb (iron factory 8BA intake) is 3/8-18, which is NPT dimension. Just installed a fitting with a 1/16" nipple to run vacuum hose to a "Delco" distributor.
Maybe those manifold ports aren't just one size.....

Last edited by 1948F-1Pickup; 09-29-2020 at 08:38 PM.
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Old 09-30-2020, 01:27 PM   #110
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Default Re: Opinion on PCV valve for flathead?

The vacuum ports on most EFV8 intakes are generally 3/8" to accommodate vacuum for the distributor advance and wipers. The vacuum to operate the Columbia OD is tee'd into this port which is located below the rear carb on my Offie Super manifold.
Generally the engines for the larger trucks have a larger vacuum port to accommodate the vacuum assisted brake booster and/or 2spd rear axle.
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