greddy oil pan with GTM TT kit

phunk

Sam, don't forget that PVC pressure will be found throughout the entire crankcase, all the way to the valve covers, so the PVC pressure is irrelevant to how high you return oil.

Larger turbo oil returns lines are used on turbo cars to make sure that the turbo oil systems pressure differential occurs at the turbo. Turbo oil seals will mostly block air from being introduced to the oil, so frothing should be minimal.

As you mentioned your customer with the spacer.. The spacer plate is well below the oil surface level, so it is the same thing isn't it? Plenty of 350z have been doing it below the oil level for almost 10 years now, even with ball bearing turbos... I have personally done it as directed in other turbo systems, although hesitant at first myself, but after more thought and experience I have not had it cause any issues for me... So I have no hesitation to doing it again when it makes sense.

Have you had a project that was burning oil until you raised the oil returns?

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