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Old 06-08-2017, 08:22 PM   #1
41LjH
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Default Power valve

Starting to build some Holley 94s. I looked thru the parts box and found a couple of power valves. One seems to be OK but the only marking I can find is the letter" F" stamped on the rim.
I have looked but I can't find anything that tells me the opening vacuum. It is an older valve without the radius so if I can find out the opening vacuum I will use it.
thanks.
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Old 06-08-2017, 08:27 PM   #2
Bored&Stroked
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Default Re: Power valve

Something to think about with old power valves . . . a lot of times the diaphragms are dried out and stiffer than Hell . . . which means they don't actually do any 'power adder' functions. If the diaphragm seems flexible and works well (you can just suck on the dang thing), then you might be okay. Or - you can buy new power valves from Edelbrock (because they make new 94's) that will work just fine.

Best of luck!
B&S
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Old 06-09-2017, 05:42 AM   #3
41LjH
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Default Re: Power valve

Quote:
Originally Posted by Bored&Stroked View Post
Something to think about with old power valves . . . a lot of times the diaphragms are dried out and stiffer than Hell . . . which means they don't actually do any 'power adder' functions. If the diaphragm seems flexible and works well (you can just suck on the dang thing), then you might be okay. Or - you can buy new power valves from Edelbrock (because they make new 94's) that will work just fine.

Best of luck!
B&S
Thanks..
The one I am considering is flexible but I have no idea what the opening vacuum is. Does anyone know if a chart exists that list part numbers or letters and opening specifications?
Do the Edelbrock valves have a radius ?
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Now THAT is a hot rod !!

https://www.youtube.com/watch?v=ZmwwB34vxJE
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Old 06-09-2017, 08:17 AM   #4
Ol' Ron
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Default Re: Power valve

You cam get any size PV from Charley NY.
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Old 06-09-2017, 09:41 AM   #5
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Default Re: Power valve

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Charlie checks them out to assure proper fit and function. A parts warehouse usually justs sell from the box on the shelf.
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