[TurboRay]

Stock built in restriction is 2mm. This is .07mm...I also have the 1.6mm that I will try to see if it still doesn't smoke.

The (rounded)  crossectional area of those restrictors are:

.07 mm  = .000007 square inches
1.6 mm = .003 square inches
2.0 mm = .005 square inches

Ergo......the hole in that .07mm restrictor only has approx 3.8% as much area as that of the 2mm factory restriction!!! Thus, the 2mm restriction is approx 26 times larger in crossectional area. [Image: confused0016.gif]

OTOH......the 1.6mm restrictor has approx 80% of the area of the 2mm factory restriction and - based on yer past experiences - is probably not enough of a change to stop the smoking.

Given the drastically-smaller orifice size of the .07mm restrictor (compared to the 2mm factory restriction), I strongly suggest a very-small-micron in-line oil filter between the turbo and engine, to prevent a small particle(s) from plugging the restrictor and burning up the ball bearings in that gee-whiz turbo, Matt!  [Image: happy0034.gif]