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Had problems with too much oil sucking past the pcv. I tried an adjustable pcv to no avail. My solution is a take-off of GM using a simple orafice. I aquired a pill (jet) holder for a mechanical fuel injection systems from Enderle along with a few different size pills. This is a simple bolt-on solution that costs very little money and it works.
I have heard the orifice is the way to solve oil consumption issues on boosted applications. I removed my full flow PCV since it used a good amount. I think I want to try this. What size is the jet?
I have heard the orifice is the way to solve oil consumption issues on boosted applications. I removed my full flow PCV since it used a good amount. I think I want to try this. What size is the jet?
I ended up using a .100" that is about the same size as the GM fixed orafice unit.
I don't even run a pcv on mine . Just a catch can between blower and rear of pass valve cover. Run a vent on dr side valve cover. Can has maybe a teaspoon in it every 2k or so.
It's definitely excessive vacuum. The spot you have your pcv, I actually have my brake booster hooked up to. I bought the hose from whipple. They use it in the 5th gen kit.
It's definitely excessive vacuum. The spot you have your pcv, I actually have my brake booster hooked up to. I bought the hose from whipple. They use it in the 5th gen kit.
Thanks Jimmy for the info. It never occurred to to me that the amount of vacuum could change from port to port since they all are in the same chamber. Looking back at my instructions they do show it in the center port. However, since my truck is smog exempt, I do not have a purge solenoid. That means I could actually use the port closest to the tb. And if the port closest to the rotors does indeed have more vacuum, my brakes will benefit by moving it there. I will give it a try since it is a simple swap. Thanks again.
Any reason you went this route instead of just a vented catch can?
I am running a Saikou Michi dual catch can. I opted to retain the pcv as it helps in scavenging the crankcase pressure much like a vacuum pump. My thoughts are that a vented catch can is limited because of the hose size feeding it especially on a boosted engine. It isn't the same as a valve cover mounted vent with a large diameter.
The problem is that with a free flow pcv and what appears to be excessive vacuum filled up my catch cans too quickly. Now with the fixed orafice all is fine.
Last edited by Duntov1967; Jan 1, 2018 at 08:42 PM.
I’m actually building a catch can, was thinking of running 12an lines from each valve cover to the can, then like a 1/4 from the top of the can above the baffles and screen, to the turbo air filter. Should get a slight amount of suction? Any thoughts on that? What size was your original line you were sucking too much with?
Whipple sent me the 5th gen Camaro instructions . It told me to cap the pvc. ( mine is in the valley cover) if it still gives you problems, you could try setting it up like mine. What are you running for boost? I'm running a 3.50 pulley, makes 13-14 up top
Yep. It could never be boost pressure, valve cover baffle design, high pressure pump, aftermarket rockers, cam choice, excessive vacuum, etc...
Now I realize that if nobody gets my sense of drunken late night humor, maybe it isn't funny. The punch line was something about you already knowing enough to fix the problem yourself.
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Whipple PCV Problem Solved 
