smoke possibilities?

[vex]

Originally Posted by RETed

If it's installed anywhere on the stock oil pan, it's already wrong.
The dump side of the oil drain needs to drain above the oil level.
Assume the oil level is going to be as high as the stock oil pan flange.
This is why the stock 13BT turbo drains into the front oil cover and not into the stock oil pan.
The oil draining off the turbo needs to have the least resistance going back into the oil supply / pan.
Check any of the turbo books - Corky Bell's Maximum Boost or Hugh McInnes Turbocharging (or any other turbo reference) - they will all tell you this.

If this is the case, you're getting oil backing up into the turbo CHRA and exiting either from the dynamic seal(?) in the compressor or the piston compression ring through the turbine.


-Ted

Which I understand and completely agree. The problem comes from me modifying the system already in place. In that respect I put it in the only location available to me. Is there any solution which I can put in place to remedy the problem besides replacement and subsequent disassembly of the front cover? Is there any benefit to installing a larger diameter chamber mid way through to the oil return port on the pan--I don't know if it would do anything, as I don't know what the oil needs to have it return to normal from the foam state?

I've noticed that the smoke is eliminated by ensuring that the oil return line is as straight as possible when it leaves the turbo. I'm thinking using a threaded pipe and installing it from the turbo flange down about 6-8in and then 90* back to the oil pan. My only concern is that the 90* bend would be too much for an easy transition for the foamed oil to return to the oil pan.

I'm open to other suggestions if anyone has any.