Yea i dont really know about the whole 2 stroke deal. I dont think that any chunks of tar like oil would be exiting the exhaust though, at least not large enough to cause damage to a normal turbine. If your using 4 stroke motor oil in your 2 stroke then i can understand that(Ive seen it on an outboard...) but a 2 stroke should never have large globules of oil exiting the exhaust. The GNX's ceramic turbine was extremely fragile by comparison which is the main reason for the catch chamber being incorporated into the turbine housing.
On the catalytic converter, it would be a acceptable filter, for a short while. On the two stroke the oily exhaust would surely clog it up in no time. Cats dont respond to well to large amounts of oil.
When my compressor seal in the turbocharger went bad the car burned large quantities of oil, at a rate of a quart every 50 miles or so. I drove it like this for a little while till i recieved the new turbo, and when i removed the turbo the headers and turbine housing had a very thick carbon coating that would chip off in large hard flakes, like slate. Some of these chips had already been chipped off and had obviously exited the exhast through the turbine.
The turbine also had some caked up carbon build up on it as well, but upon inspection and cleaning it was in perfect shape with no damage whatsoever.
If large hard chips of carbon did nothing to the stock turbine, i dont think that suspended oil droplets or small chunks of tarry oil will really pose much threat to the turbine in the 2 stroke application unless of course its a ceramic turbine, or something equally as fragile.
If you still want screens, it sounds like the ones turbo2nr mentioned would work.
Later
