That breather that lets air out is just like having a hose disconnected on the intake plenum. You can get rid of it all together. The problem is that system is supposed to stay sealed on the vacuum side.
The factory system has the fill neck hose hooked up to the intake pipe after the MAF. This allows the engine to pull vapors into the throttle body when accelerating. Under those conditions there is no vacuum so the PCV is closed. When cruising or idling the intake produces vacuum opening the PCV and pulling vapors.
In your application that routing is correct. It should go to the inlet pipe for the SC. There is no need for a check valve there because it won't see boost or vacuum.
The Supra check valve is very popular with boosted cars. On my set up the breather tank won't allow boost to build on the crankcase.... just like your breather filter on the hose going to the power pipe before the SC.
My car uses a stand alone ECU that users speed density ( no MAF ). In a car with MAF ghe hose going to the inlet of the SC should go after the MAF in the charge pipe.....just like mine would go in my charge pipe. Putting it before the MAF will cause the car to think theres more fresh air being oulled in than it actually is. ( this can be changed with a tune though ). In that case that hose would have to be sealed and use a check valve to keep boost out of the crank case. I'm not a big fan of running a system that way. If a check valve fails.... bad things can happen.
The factory system has the fill neck hose hooked up to the intake pipe after the MAF. This allows the engine to pull vapors into the throttle body when accelerating. Under those conditions there is no vacuum so the PCV is closed. When cruising or idling the intake produces vacuum opening the PCV and pulling vapors.
In your application that routing is correct. It should go to the inlet pipe for the SC. There is no need for a check valve there because it won't see boost or vacuum.
The Supra check valve is very popular with boosted cars. On my set up the breather tank won't allow boost to build on the crankcase.... just like your breather filter on the hose going to the power pipe before the SC.
My car uses a stand alone ECU that users speed density ( no MAF ). In a car with MAF ghe hose going to the inlet of the SC should go after the MAF in the charge pipe.....just like mine would go in my charge pipe. Putting it before the MAF will cause the car to think theres more fresh air being oulled in than it actually is. ( this can be changed with a tune though ). In that case that hose would have to be sealed and use a check valve to keep boost out of the crank case. I'm not a big fan of running a system that way. If a check valve fails.... bad things can happen.