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I used 4" of blue low silicone 3/4" I.D. pressure hose that is oil resistant to make a oil catch can. I filled it with Fram's white pcv filter material that comes in bulk at the Auto Parts stores and added two plastic ends that adapt down to 3/8" hose line. Two 1" hose clamps on each end keeps it from coming apart under boost and then put it into the line that runs from the manifold to the crankcase. The pcv material comes in a square and it has what looks like a more pourous inside than the outside surface so I cut circles out of the square bulk piece and put the circles into the hose, stacked on top of each other. I can check it by loosening one hose clamp. The bulk material from Fram sells for $2.99 a square and one square gives enough for 2 cans. I check it when I change oil.
After using a CH air/H2O seperator this design may not be effective enough. The air speed is very fast thru these cans and the oil has the ability to walk up the walls if the passage is narrow enough. This can looks too narrow. Even tho there is filter media I'm guessing it will still draw the oil up and out. Keep an eye on it for a while and maybe install a clear fuel filter in line to see if any oil gets by it. Also, our engines lose a lot of oil and if the bottom fills up, that exit positioned so low will suck out liquid oil. I collect about 2 tablespoons of oil between fill ups. I empty mine about every 3 tanks of gas.
Gary compare it to the AMW and the difference is clear. The AMW has a large surface area(entire perimeter) which slows the air flow. IMO you'd be better with 1 AMW over 2 of these.
Keep us posted on how it works out for you
NOTE: Personally, I would reverse the air flow. I just noticed they have the air flow up thru the filter. Let the filter media clean the oil out and drip free in the direction of air flow. Otherwise the air velocity will carry the oil up and prevent dripping back to can. Also, remove the air filter at the top. It will restrict air flow once it gets saturated with oil.
Now you say that We will keep an eye on it. Draining is easy as long as you install it where you can snap off the bottom. I guess we will see. Thanks for the imput