power valve recamendations

[Michael C Henry]

You would think the Cam manufactures with all the information they have before they reccamend or make a cam ,would be able to reccamend a power valve range that would work.They surely know about how much vacume an engine will maintain with what cam and carb setup.When you ask for a reccamendation they ask every questio upto and incluning what you had for lunch.
Mine is a 427 Ford side oiler aluminum Dove Canadian Super Cobra Jet heads, 11.5 -1,Dove tunnel wedge 2x4 intake two 600 cfm Holley 4160 carbs.Comp Cams solid lifter cam 252° at .50" and .598"lift>That is close enough.Oh sealevel.

[CJ428CJ]

I don't know of any way to determine the right PV other than hooking up a vacuum gauge and measuring the actual vacuum on your motor. That's easy to do though. If you don't have a vacuum gauge you can buy one for about $20 or rent one for a couple bucks.

[Michael C Henry]

I have a vacum gauge but getting the thing to a point of running to determine what power valve would make it right.The plugs are all black now .Start with freshened plugs.still have to set timing adjust valves etc.

[427 S/O]

Mike, one aggravating thing about the PV's is the gasket, you need to hold it in a centered position while you tighten it by hand, once snug then put the wrench to it. From your description I would start with a 5.5 PV and work from there.

[427 S/O]

Mike, I'm still asleep.......The rambling about the PV gasket was just to let you know it will leak and dump gas like crazy if it's not installed correctly....I know...