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I was wondering, The oil lines for the turbos, does it matter which opening you use for oil in vs oil out? Becasue if the turbo is a top mount turbo the oil lines would then be "upside-down" correct? Or does it even matter which side you use to get the oil in the turbo, just as long as the oil gets to the turbo....

Good question..................I would contact the turbo manufacturer to get the best answer.

Me thinks pressurized oil will find it's way through the turbo, but I'm not sure.

On my turbo the "out" hole is bigger then the "in" hole. But can't you just clock the center part to be in any spot?

Jays535is wrote:On my turbo the "out" hole is bigger then the "in" hole. But can't you just clock the center part to be in any spot?

I agree with Jay , normally pressure line is a smaller diameter than the scavange or return line.

The larger hole is the drain. You do not want pressurized oil "in" the center section, just a constant flow. Pressurized oil with defeat the seals and result in oil burning in the turbine housing.

The turbine housing, center section and compressor can be "clocked" relative to each other so you can aim the oil drain downward no matter the orientation of the turbine or compressor housing.

Sweeney wrote:The larger hole is the drain. You do not want pressurized oil "in" the center section, just a constant flow. Pressurized oil with defeat the seals and result in oil burning in the turbine housing.

The turbine housing, center section and compressor can be "clocked" relative to each other so you can aim the oil drain downward no matter the orientation of the turbine or compressor housing.

x2

In addition, although not significant in a daily driver, oil seepage into the intake and exhaust will reduce BMEP.