Were gonna keep it consistent here. With the crankcase breather in the oil cap opening, and a breather on top of your can. Literally ALL you need is the -10 an check valve so it holds vacuum in the crankcase at idle, off throttle conditions. Under boost, and crankcase pressure situation. That breather is similar in size to a -22 fitting, it can vent a TON of volume. You also have the -10 hose to the breather on the can when positive pressure is present. Y, fitting for what? You are looking for positive vacuum pulling on the crankcase at idle, and off throttle conditions, and as much venting as you need under boost, etc. That set up will provide that. Nothing else is needed. I would make a diagram but away from the computer. Just take our external pcv stock valve cover vtt on the high side guide, and add a -10 check valve on the high side, a vacuum relief.So @[email protected] I know you said you may have Tony redo the guides, but I think I have a one-off (or close to) system so I have a question on how to run it with stock VC.
My low side is externalized using your parts (8an PCV delete > 8an hose w/ inline 2jz valve > can > VTT check valve > TB adapter) but my high side is a bit more complicated. Essentially it's a modified version of the VS breather setup so I can run vacuum on low side and full VTA on boost. Its running as such:
Stock flapper > 10AN line > breather can w/ filter on top ("center" of my high side setup)< 10AN line with 10AN VTT check valve stopping flapper from pulling air from anything other than breather filter < 10AN fitting on front of head. I also have your oil cap breather for more venting.
Would I just pull off the flapper and run a Y like mentioned above still? So basically flapper delete > Y with one side going to this valve, and the other running to my can? Or would I need to add a check valve on the can-side of the Y still? Only reason I'm confused is because it sounds like if I had a check valve on the can side of the Y prior to the can ( Y > vacuum valve, Y > check valve > breather can) I would no longer have a vacuum source due to the only inlet/filter being blocked by the check valve. Or am I still misunderstanding, and this valve would now be my entire source of vacuum for the system rather than the breather filter providing the inlet for vacuum? If the latter is the case, would I just move the check valve from the head port side of my dual input can to the (currently) flapper/CCV side since theres no vacuum being pulled from the can? Or would I need to add an additional check valve, thus having one on both sides of the breather can?
I know you guys like to KISS when it comes to PCV at VTT, and it sounds like for your system on a stock VC this would just plug into the outlet on your CC. But I like having all the extra venting for safe measure so I'd rather not get rid of the dual inlet breather can setup if possible, however I've always wondered if I'm pulling enough vacuum with my current setup. I dont experience any smoking or other vacuum-deficient symptoms right now so I know it's at least okay, but if I could get more ring seal etc out of my setup I'm okay with a hair more tweaking.