Originally Posted by 35reilly

When you guys talk about a oil sensor after the the oil pressure switch do you actually mean run a oil pressure sensor to th inside of the car? Hard to explain what is m actually trying to say I know. Lol. I have a g35 I just ran an aem oil psi to monitor oil psi. I'm confused you are running an additional gauge just for turbos as well? Or is this the oil psi gauge for oil psi as well?

Originally Posted by R6n350GT

Oil pressure gauge yes, just for the pressure of oil going to the turbo.

Originally Posted by rcdash

The filter goes on the feed line to the turbos, of course. I have mine before the tee that splits to each turbo. The oil psi recommendations are different for journal vs ball bearing. 5-10 psi at idle, 30-40 psi max rpm for ball bearing turbos. I have the .035" restrictors on the turbos and the filter, which is also .03", running 4AN lines. I originally tried a filter with .05" orifice and I had a little leaking of oil around the center section until I went to a smaller size.

For journal bearing, I think 1/8" orifice is correct with no other restrictors. They need a lot of oil to cool the bearings.

I have been changing filters twice per year, but hardly see a few flecks so will probably change filter annually. The filter does catch these tiny black deposits.

EDIT: Here is the reference link for psi required for different turbos, http://www.turbomaster.info/eng/bulletins.php?id=31