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 Post Posted: Sat May 19, 2018 5:01 pm 
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Joined: Thu Mar 06, 2014 9:20 am
Posts: 554
Location: Mountain Home Id
I have a 350 ci engine with a 650 Holley Street Avenger. I used a vacuum gauge in the line going from the manifold to the HEI distributor. The highest vacuum level I got was 16 inches. The car ran great but it smelled like it was running rich. I then tried in a dead end hose from the manifold that goes to the pvv valve. I couldn't get it over 15 inches. It ran well and didn't smell like it was rich. Any ideas on how I can do a better job?


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 Post Posted: Sun May 20, 2018 8:15 am 
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Pro Stocker
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Joined: Tue Oct 05, 2004 10:28 am
Posts: 1737
Location: Canton Mi.
Things that can cause low vac
Retarded ignition timing
Low compression
Any kind of intake leak
Tight valve timing
Large cam


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 Post Posted: Sun May 20, 2018 5:23 pm 
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Joined: Thu Mar 06, 2014 9:20 am
Posts: 554
Location: Mountain Home Id
The gauge is very steady. The initial timing is at 16 degrees and advance timing is at 28 degrees. The only problem is getting the air/fuel mixture correct. Where is the best place to take this reading?


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