Lol. There is so much mis information on the internet it is sickening. That is what I meant by my comments. This is my personal experience. They say Oil pressure drops with a Vac Pump Pump at Idle and at WOT. I found out in my case it for sure is a Myth. I gained 8 PSI at Idle and dropped none at WOT. That is 5 in Vac at Idle and 20+ in Vac WOT. I had a similar issue as Wazoo. Excessive crank case pressure. I tried all the stuff you guys are talking about. Welded breathers tubes on the valve covers, raised them up etc. 1 Breather, 2 Breathers and a PCV. None worked at all. Oil was entering the cylinders at high Rpm. Not good for Nitrous. I had a couple oil leaks but nothing major. After the Vac Pump install, I have No oil leaks what so ever. I installed the VP 104 Vac Pump Kit from GZ. It was supposed to be a bolt on deal. Lol to that one. I had to modify the mandrel and mounting bracket and get a different cog belt after the mods. As far as oil in the canister........ I have checked it a few times after LONG runs in my car to the tune of 2 tanks of fuel per cruise and nothing worth noting was in the canister. The last time I checked the canister I had burned 4 Tanks of fuel which is about 55 gallons. Maybe, and I am being generous, there was 1 Table spoon of oil in the canister when I un did the drain plug. As far as power goes, for sure there was a noticeable difference in how the car runs. I will forever use a Vac pump from now on in every build. It makes that much of a difference in noticeable power increase. The GZ set up has Baffled breathers and an adjustable bleed valve to fine tune how much vac you want. Very easy to adjust with 2 fingers. As far as I am concerned there is NO Negative effects of running a Vac pump on the Street. Only positive results apply. Mine is a 410 Stroker that I drive the snot out of everywhere " Not supposed to do that with a Stroker" Lol. Solid Roller .634 lift at the valve "YES on the Street" I also hit it with a 200 Hit of NOS. A 904 built by me that I am throwing at least 725HP through with a Pro Transbrake "Not supposed to do that either" it has not missed a beat. That is my story.
