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post #1 of 2 (permalink) Old 06-26-04, 11:05 PM Thread Starter
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Join Date: Oct 2003
Location: Washington State
Age: 63
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Holley vacuum ports

I'm installing a new Holley 750 double pumper carburetor. I know where to connect the vacuum for my distributor advance. There is a 3/8 male hose nipple in the rear base of the carb for the PCV connection, according to the manual. There is also a small tap supplied in the front base of the carb.

Where the heck can I pickup vacuum for my brakes and accessories. I'm running a supercharger so I can't pickup vacuum from the intake manifold. It needs to come from somewhere above the intake manifold and supercharger.

I can use the PCV connection at the carb base for my brakes, but where then do I provide vaccum to my PCV and crankcase ventilation? I have thought about putting a tap in the base of my air cleaner plate for providing some draft from the crankcase. I have a vented oil filler cap on one rocker cover and a pvc-equipped cap on the opposite rocker cover.

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post #2 of 2 (permalink) Old 09-12-04, 02:34 AM
Join Date: Aug 2004
Location: sydney
Age: 42
Posts: 16
Re: Holley vacuum ports

i have a alloy space plate with the extra pipe and new studs for the carby ... (an old redline manifolds product ) its about 1/2 inch thick ...
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