<< > > > Chris Gentry wrote:
 > > > Related question:  The normal oil source for the stock turbo appears to
 > have gone
 > > > through the engine and then goes to the turbo which means it is already
 > very hot
 > > > oil.  My T04 is not water cooled so I would rather lubricate the turbo
 > with cooler
 > > > oil.  Any suggestions on how I could safely do this?
 > > >
 > > > Regards, Chris Gentry
 > > >                 Glasair Turbo Rotary
 > > >                  Dragonfly Turbo Subaru
 > > >                   Grumman Cheetah
 > >
 > >
 > > A "T" in the oil return line from the oil cooler? Are you using a
 > > metric to AN adapter where the oil cooler line goes into the block?
 > > See picture with red arrow. Banjo fitting shown.
 > >
 > > Paul Lamar

 Chris Gentry wrote:
 >
 > Thanks Paul,
 > I am using the AN adapter and it sounds like a very good place to use a to
 > tap off for the turbo (using a "T").  Do you think there would be a problem
 > with that much pressure from that point or is it pretty constant through
out
 > the engine?
 >
 > Regards, Chris Gentry
 >                 Glasair Turbo Rotary
 >                  Dragonfly Turbo Subaru
 >                   Grumman Cheetah

 You might want to temporarily install a mechanical pressure gage at the
point after
 the T to see if it affects the oil pressure at that point. I have no idea
 what the restriction through the turbo bearing unit is so even if I had
 that data I would not know how to calculate the pressure loss if any :-)

 Paul Lamar >>

The turbo bearings will use oil proportional to the pressure fed to them.  1
GPM is a good round number for a T04.  There will be no pressure
remaining/available at the bearing drain.  Remember, a "happy" turbo "thinks"
it is draining on the floor.

Jeff Spitzer

So assuming we had 80 psi Jeff what size line would you use
to feed the turbo to get one GPM?

Paul Lamar

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