HP500 PCV Valve
10-03-2012, 03:58 PM
#11
Where do they feed into the induction system? On most automotive carburetors, there is a large vacuum port on the carburetor base where you run the PCV hose. Can't recall if my Holley carb has that fitting on it.
10-03-2012, 11:52 PM
#12
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pcv valves use spring tension and hole(orifice) size on bottom. when i was younger used to swap pcv valves and it would effect engine, either pull or hold oil in valve cover, foaming. orifice and spring effects to idle characteristics and function. early carbs did not have pcv or any ports, mid 90's carbs seemed when pcv made it to engines.
