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Old 03-12-2011, 09:55 AM   #1
NicoSlam
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Vacuum help

I am in the process of connecting the vacuum lines but need a little support. I need to connect the Pcv from the valve cover and the vacuum gauge on my cluster. I have two spots, vacuum port on the intake and vacuum port on the carb (625cfm Carter ). Which connection goes where??

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Old 03-12-2011, 11:39 AM   #2
GASoline71
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Re: Vacuum help

The PCV is gonna be a bigger line (3/8" or so). So it needs to go to a large vac port. Usually in the back of most carbs. I would hook the gauge up to mainfold vacuum port if it's possible. If not... hooking it up to the carb port will be okay.

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Old 03-12-2011, 11:41 AM   #3
yob2kanobe
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Re: Vacuum help

PVC valve goes to the carb port, vac guage reads manifold vacuum.
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Old 03-12-2011, 12:12 PM   #4
bsteenburg
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Re: Vacuum help

Both need direct manifold vacuum source. The PCV is larger hose to pull a greater volume of air from the crankcase. The gauge is the smaller hose, just needs a source to sense vacuum.


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Old 03-13-2011, 08:04 PM   #5
NicoSlam
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Re: Vacuum help

thank you guys for the help. I usec a 3/8 barb fitting and connected the PCV valve to intake and connected the vacuum gauge to te port in back of the carb. thanks again.
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