Hi,
After getting some inspiration from a thread started a short while ago about boost controllers and K&N filters, I decided to do what dieseldiehard did and buy a K&N to bolt directly to the turbo. The pics should pretty much say it all, but if there are any questions, please ask.

The oil separator is made from PVC pipe and matching end caps, brass hose fittings, rubber automotive tubing, and two copper scrubbing pads on the inside. Air that is fed back into the intake comes out of the top of the device, the air/oil mix from the crankcase goes in through the side, and the oil comes out the bottom back into the oil pan.

This thing is kind of a first run. I plan on redoing the home made oil separator using wider but stubbier PVC. The car runs great though, and the turbo sound is much more pronounced. Around town, it's only a little faster, but on the highway it's a completely new car. I carry the original air filter unit in my trunk with the necessary tools needed to reinstall it, just in case something happens. I've driving 50 miles though, and everything seems A-Okay, except for a little leakage from the separator. I'll address that with some silicone sealant.

Alex

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1983 300D (parked for four years)
2012 VW Sportwagen TDI Manual
2001 Miata SE
1962 Chevrolet Corvair Rampside