crogthomas
Active member
- Joined
- Jan 30, 2008
- Location
- UK
It all works out if the the PCV lines are after the MAF. Some of the Japanese turbo cars were MAF as well.
Any suggestions for a PCV er, valve to use?
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It all works out if the the PCV lines are after the MAF. Some of the Japanese turbo cars were MAF as well.
Any suggestions for a PCV er, valve to use?
I just used a random one from the auto parts store, maybe a ford one? McMaster Carr has a bunch of low pressure check valves that would work as well. Silicone Intakes has some that are 12mm hose size as well as a few AN sizes if you want to get fancy.
http://www.siliconeintakes.com/liquid-air-adapter/aluminum-one-way-check-valve--6an-p-9586.html
On the NA race engine, I drilled the underside of the oil filler cap with a ~3/16 or 1/4? hole. I also stuffed some foam filter media into the cap (they pop apart) to filter the air going in.
Then a hose from the breather box to PCV to catch can (stuffed with steel wool), and then to the intake manifold. This allowed for a constant flow of fresh filtered air to go from the valve cover down to the crank case, and out the stock breather box. Idle was adjusted for the added leak rate from the cap.
A well working stock turbo ?PCV? system works okay, but it all needs to be clean and functioning properly. Also, the small vacuum/boost ?t? just above the breather box needs to be clean and in good working order. Also, the breather hose pre-turbo in important at it supplies a vacuum (bernoulli effect).
I just used a random one from the auto parts store,
You might want to have a chat with every engine manufacturer out there. The stock oil separator drains back to the crankcase. The provent is just doing a better job of separating the oil from the blowby gases. There's no functional reason not to drain it back. You should be getting your oil up to temp so the water vapor and other volatiles will evaporate.
Your oil stays cleaner longer if your not returning the **** you filtered to the sump. Factory returns to sump because they know no ones going to drain the catch can. But we will. Personally I wont drain it back to the sump. But as a cnc machinist, a similar thing goes on with my cnc machines. They make oil vapors from coolant and its collected in mist collectors, the factory returns that **** to the sump but its disgusting and no coolant manufacturer recommends that. Theres no combustion taking place in my CNCs either so their waste oil is even cleaner than a cars engine oil.
Basically this argument is everywhere, return to sump for simplicity if you dont give a ****, drain it yourself if you do.