Quote: Originally Posted by Breakin Newz
Straight from Darrel Cox..
Its best to run the PCV thru a check valve to insure it from leaking while under boost. Next the engine really benefits from the added vacuum under boost if the drivers side of the valve cover is connected back to the air intake. There is alot of vacuum there while under boost. To insure no oil gets consumed from the air intake you install a recovery tank between the two. This way when the car is at idle and under no boost the PCV, hence the name (Positive Crankcase Ventilation) keeps vacuum applied to the engine. When the engine is under boost the air intake pulls a vacuum on the crankcase. Bottom line vacuum all of the time. The rings conform to the cylinders better with vacuum. Also ring flutter is minimal with vacuum keeping oil from being pushed by the rings and up onto the top of the pistons and combustion chambers. Out of all of the engines we have disassembled over the years you see it every time (the ones that are not connected to the air intake) also remember that engine oil added into the combustion process greatly reduces the fuels octane. This can causes unwanted detonation and spark knock. The crank seals, valve seals, and cam seals are designed around this vacuum. Also this greatly reduces windage in the crank case further adding proper oil control and some added performance.
This is how I have it hooked up and I like it better then when I had a breather on my valvecover...
I have seen this many places. So it seems the correct way to do it vs the breather.
Original poster: THANKS for taking the time to do a write up
