Thread: Vacuum port
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Old 12-29-2019, 07:39 AM   #9
Terry,OH
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Default Re: Vacuum port

The Offy vacuum port should go to the distributor vacuum brake. If you place a vacuum gauge there the vacuum will be the highest at idle 18-20 and decrease as engine speed increases. I would cap the Edlebrock vacuum ports if you place a vacuum gauge on the Carb port and increase engine speed the vacuum there should increase with RPM.
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