Originally Posted by
NotSure
I've had their E2-X catch can setup installed since my blower install. The only thing the dual inlet can does is add a second port to the can that you connect to the intake tract pre-throttle body. Unless you are referring to a different one, there is nothing special about this dual inlet can other than an added fitting on the "clean side". This kit also includes a replacement oil fill cap that has stainless mesh in it, with a hose fitting to also connect to the intake tract for a secondary avenue for crankcase gases to get pulled out, and to provide fresh air into the crankcase when not under boost. 2 check valves are included to install in the appropriate places for boosted applications. For what it is worth, I measured up to 6 kpa crankcase pressure at 8 lbs boost with this setup. Since then I have pulled the pcv connector out of the left rear valve cover and drilled it out (from 1/8 to 3/8"), installed the expensive ME Wagner adjustable pcv valve, put a larger fitting in the intake tract, and max crankcase pressure is now around 1-2 kpa. Still could be better. Measured with a GM MAP sensor, signal fed into a MVPI1 Pro analog input. After drilling out the valve cover connector, I tried a stock pcv valve (unknown application) between the catch can and manifold vac port, but it was not pulling vac on the crankcase in part throttle conditions. Good luck finding any flow data to pick an appropriate pcv valve. This is why I went with the ME Wagner, it gives you an adjustment for idle and part throttle, then acts as a check valve under boost (they only tested to 20 psi for you big HP guys).
I had the need to pull the blower back off shortly after installing it for injectors (few hundred miles?), and there was still some oil puddling in the lower intake. Never took any measurements, but usually only got a couple tablespoons after a few hundred miles. In the wintertime on E85, the catch can would trap a bunch of condensate/oil sludge, very nasty.