I took my charge pipes apart the other day and noticed oil was passing through the compressor seals and blowing into the pipes. I have a -4an feed line with -10an return line, and had a .090 restrictor in it. So I swapped to a .075 and it improved but still passed some, and now I'm at a .064 and still having some pass through. My return line flattens out somewhat where it loops around in front of the crank pulley, but I dont think its enough to cause a problem. Anybody had similar issues? I know most of the time the issue comes crommthe other side of the turbo. I can go smaller on the restrictor, but im worried about damaging the turbo. My truck usually has around 60psi oil pressure at cruise.

 

i have always had good luck with the no4,no10 combo,, how old is the unit?

 

The turbo has been on since December, but I havent beat on it at all really. Only a few dyno passes, 99% of its life it has been cruising under vacuum due to a stock tranny. I bought a 45* fitting to go on the bottomof the turbo that should let me keep my drain a little more vertical so hopefully that will fix it. I dont want to go any smaller on the restrictor if I can keep from it