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09-01-2014, 10:04 PM
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Registered User
Join Date: Aug 2006
Location: Redmond, WA
Posts: 6,334
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Idle Vacuum - How much?
With a good large 2" gauge I'm seeing 15inHg of vacuum on my stock rebuild 402 at idle around 600-700rpm.
Since its a stock cam, I was expecting more. It runs fairly smooth, not perfect. The needle is steady, doesn't move more than 0.5" and doesn't bounce around. What would be normal for vacuum on one of these? Or is it? Thanks, Dave
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1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible |
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