<< > Chris Gentry wrote:
 >
 > I am starting to plumb the oil to and from the T04 turbo.  The turbo oil
outlet is
 > below the normal return hole of the engine case. The turbo drain hole is
about 1
 > inch above the full oil level.  Please comment on the following options I
may
 > choose to get adequate drainage:
 > 1) Use a fuel pump to scavenge to the original turbo oil return hole in
the case.
 > Which fuel pump?

 Good question Chris. Maybe Chuck can answer. As I recall he is using fuel
 pump to scavenge the turbo oil. Chuck?

 > 2) Fabricate a drain barb into the top (near the pan bolts) of the oil
pan.  This
 > may mean I would have to keep the oil level slightly lower than full. With
this
 > option should I run a 1/2 quart low or extend (horizontally) the oil pan
capacity
 > or add another small  oil cooler and always run 1/2 quart low.  (I'm using
the
 > stock RX-7 oil cooler.)

 Does not sound like a very good plan.

 > 3) A better idea that you might suggest.
 >
 > 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

The fuel pump will not likely have enough capacity to handle the air flow
present in the turbo drain line unless it is a dragster model.  There is
nothing wrong with the barb in the pan idea as long as the oil level never
covers the hole.  Use a big line like -12 'cause you'll have very little
"slope"

Jeff Spitzer

 
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