Posted for Micah Froese <micah@froese.com>:


 I have the same set-up I believe.  Lancair Legacy, Performance Engines
IO-550-EXP.  The oil cooler is the following:
 Niagara Development and Manufacturing Oil cooler  p/n 10195A
  TCM P/N 649923
 
 Oil temps have never been an issue once the oil door was adjusted.  First
flight was in the winter, and oil door had to be almost completely closed to
get the oil temps above 180.  Now in the South Carolina summer, I can climb up
to altitude on a hot (95 dgrees +) and not get above 210.  Probably could open
the oil door a bit from it's winter setting, but the temps are perfect in
cruise.  CHT's never get above 325, and usually are around 280-300.  Remeber
that you want the oil to get to at least 180 to boil off any water vapor.
 
 My cowling inlets are slightly modified, the shape has been changed so that
the inlet gets bigger as it enters the engine area.  The inlets are maybe an
inch long.  The reshaping has probably opened the inlets a little.
 
 
 Micah Froese
 Lancair Legacy
 165 hours