Blowby
Thread Starter
Burning Brakes
Joined: Nov 2005
Posts: 1,228
Likes: 44
From: Houston MN
St. Jude Donor '10
So after stopping at 4 parts stores yeaterday and not being able to find the right PCV valve, Chris is just going to send me one. Thanks once again ECS for great customer service!
Le Mans Master
Joined: Aug 2002
Posts: 8,472
Likes: 38
From: Houston TX
St. Jude Donor '11
Here's how mine is set...
Red arrows are one-way checkvalves. The one towards the inlet of SC allows the system to continue letting blowby out when the system is under boost (other checkvalve closes). This has the added benefit of possibly creating a vacuum in the crankcase which I've heard let's the rings seal better.... maybe
Red arrows are one-way checkvalves. The one towards the inlet of SC allows the system to continue letting blowby out when the system is under boost (other checkvalve closes). This has the added benefit of possibly creating a vacuum in the crankcase which I've heard let's the rings seal better.... maybe
Not sure how I feel about tee'ing the valve cover into the dirty side but I do like teeing the clean sides together. Do you say "added benefit" because there is no breather?
Safety Car
Joined: Apr 2004
Posts: 3,932
Likes: 8
From: Hayward California
Why do you call it "dirty"? Either way, only one needs to be used and I'd use the one picking up the least amount of oil. 
The "benefit" being it's creating negative pressure which is supposed to create a better seal at the rings. Not something I've proven but just makes me feel better. Plus, with this setup my oil pan no longer seeped/stained of oil so I know for sure crankcase isn't being pressurized.
BTW... it's important to limit the amount of vacuum from the manifold with a good pcv/checkvalve combo. If I put a breather in it would be on the passenger side and with a vacuum relief valve so it could be a source of fresh air to better evac and still retain vacuum.
The "benefit" being it's creating negative pressure which is supposed to create a better seal at the rings. Not something I've proven but just makes me feel better. Plus, with this setup my oil pan no longer seeped/stained of oil so I know for sure crankcase isn't being pressurized.
BTW... it's important to limit the amount of vacuum from the manifold with a good pcv/checkvalve combo. If I put a breather in it would be on the passenger side and with a vacuum relief valve so it could be a source of fresh air to better evac and still retain vacuum.
Last edited by AVB; Aug 19, 2010 at 11:53 AM.
