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blackrosenova400
03-17-2010, 12:55 AM
If it smokes at idle you can try this and only briefly.

Run the motor for a bit to lubricate the turbo. After that open up the wastegate completley to bypass all exhaust pressure off the turbo turbine. Then put something in the compressor wheel that wont hurt it, to stop the compressor wheel from rotating. Then go ahead and remove the feed from the turbo and plug the feed line. Run the car at idle and see if it still smokes.

Generally once oil has escaped the turbo, its too late and reducing oil to it wont help. I run a .110 restrictor on mine, with source oil pressure at 15 at idle and 80 psi at 8500 rpm.

CarPsyco84
03-17-2010, 10:55 PM
Ok, I've gathered some more info. I tried a custom drain tube and now it does not smoke on cold starts anymore, only WOT shifts. Well, after putting a low pressure gauge in the dip stick tube I found out why. Damn thing made 3psi of pressure... in the crankcase, under full boost. pretty sure the limit for holset/garrett turbos is a fraction of 1psi... I made a custom catch can out of PVC, ran 3/8" line from both valve cover breathers and a 1/2" line to the intake. I'm for sure pushing coolant now too, so now I'm thinking not only pushing coolant but pushing air to the crank case? Did a sniff test on the coolant doesn't have Hydro carbons at idle.