I posted the same question on my radiator cap question. I want to run the electric vacuum pump that is listed above. I seem to have some leakage running the .043 top and second ring and 3.0m oil ring and the header evac just is not enough. Question is do I run it all the time or only at WOT? My alternator only charges at 4500 rpm and above. If I run it all them time will it kill my batteries? Should I run a relief valve so I dont have oiling issues and do I only hook it up to one valve cover or both? Thanks Chuck