Which Power valve

Planojc

Planojc

Well-known member
I know this is a loaded question but after several searches here on the forum I came up empty. Asking the rebuilding experts, what power valve for a 94 do you recommend? I am at 500 ft. elevation and running a 59AB, so is 5.5 the correct PV? Thanks in advance.
 
It's a good place to start. Not all engines respond the same to a certain power valve (economizer valve). I had the same problem with Holley 4-BBL on my Corvette (the power valves are almost identical to those in a 94 and work the same way). I drove around for a couple of weeks with the hood cracked and a quality vacuum gauge taped to the windshield wiper and swapped power valves until I found a combination that I liked. I think I ended up with a 6.5.

The number on the PV is the vacuum below which it is supposed to open to enrichen the mixture. I have found that many PV's these days are not marked (at least I can't find 'em).
 
I agree with tubman. I would use a 6.5, escpecially with a mild or stock cam.
I believe that's what charlie ny uses, and he's the best with Holley 94's.

Sal
 
Talk to Charlie ny/Charlie Schwendler. He is a great source of information for your needs on these type carburetors. Unfortunately, he has been band from posting on this website.
 
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