The Edelbrock EFI PCV valve (#3592) is specified for use with EFI systems and is tuned for low-vacuum camshafts; it opens later than many PCVs so it remains closed at idle and during tip-in. That delayed opening helps reduce unwanted crankcase flow during low vacuum conditions, making it suitable where controlled ventilation timing is needed in Pro-Flo EFI or similar fuel-injected applications.
Edelbrock EFI PCV Valve