Over kill PCV
Over kill PCV Stole the idea from C6dude. http://forums.corvetteforum.com/c4-f...-it-works.html Got pump off EBay and just ordered vacuum switch. Ain’t made up my mind on catch can or location but its not going to be as cool as C6dude.
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TECH Regular
Joined: Nov 2009
Posts: 446
Likes: 0
From: Farmington Hills, MI
The size seems like overkill, but then you are boosted!
You might already know this, but I didn't so I thought I'd point it out. One thing to keep in mind is that our modern PCV system actually has a clean side and a dirty side, and you actually get fresh (metered) air drawn through the engine to prevent the buildup of water vapor and sulfer. After I did my intake swap, I just put the crankcase under vacuum (no clean side!) and my engine was not happy. Frankly, it looked like I had lost a head gasket because the water vapor in the blow-by was condesnsing in the valve covers. To keep a stock like system, you'd want to put the vacuum pump in-line with the dirty side tube, and still feed the fumes back into the engine.
You may also want to put a catch can on the clean side too. As near as I can tell, when you spend a lot of time at WOT (who would do that?) some oil gets through the clean side and into the intake too. I can see oil residue from the clean side, even though air is normally flowing into the engine through that tube.
Good luck! I'm really interested to see how this works out for you! The vacuum pump is supposed to make the rings seat better too (a little more power)!
You might already know this, but I didn't so I thought I'd point it out. One thing to keep in mind is that our modern PCV system actually has a clean side and a dirty side, and you actually get fresh (metered) air drawn through the engine to prevent the buildup of water vapor and sulfer. After I did my intake swap, I just put the crankcase under vacuum (no clean side!) and my engine was not happy. Frankly, it looked like I had lost a head gasket because the water vapor in the blow-by was condesnsing in the valve covers. To keep a stock like system, you'd want to put the vacuum pump in-line with the dirty side tube, and still feed the fumes back into the engine.
You may also want to put a catch can on the clean side too. As near as I can tell, when you spend a lot of time at WOT (who would do that?) some oil gets through the clean side and into the intake too. I can see oil residue from the clean side, even though air is normally flowing into the engine through that tube.
Good luck! I'm really interested to see how this works out for you! The vacuum pump is supposed to make the rings seat better too (a little more power)!
I really couldn’t see somebody doing this unless they were boosted. (maybe I should post this in another section of LS4 tech) The problem I’m having is oil leaking out of turbo and into the charge pipe. I’m guessing from excessive blow by pressurizing the crankcase and back feeding thru the oil drain.
I’m putting it on the clean side and using the oil separator as a catch can (no reason it was free a catch can would work just fine) under normal conditions the PCV will pull fresh air through it. When I get on it the pump will kick on and should create a vacuum in the crankcase.
Waiting on vacuum line right now.
I’m putting it on the clean side and using the oil separator as a catch can (no reason it was free a catch can would work just fine) under normal conditions the PCV will pull fresh air through it. When I get on it the pump will kick on and should create a vacuum in the crankcase.
Waiting on vacuum line right now.
