REFLECTOR: excessive oil overboard

[RICHARD J VANDERSTEEN]

--- Joel Smith <joels at austin.rr.com> wrote:

> What is excessive?
> 
> How do you operate your normalized 550? I am not to
> familiar with the 
> normalized 550.
> 
> I have  a TIO-520R. I think it has excessive oil
> overboard, but to give 
> you an idea, I occassionly have to add a quart in
> 25-30 hrs, then I 
> change it. I have met folks that think this is good.
> It holds 10 qts, I 
> fill it to 8 qts and add one if it goes to 7. If I
> fill to 10 qts, it 
> seems to blow it overboard quickly. I am able to
> maintain good CHTs so I 
> am not to worried about my reserve oil cooling
> capacity. My oil temp 
> stays in check. I would not recommend less than the
> specified amount of 
> oil if the temps are high.
> 
> My operation is as follows:
> Take-off, 2700 rpm, manifold pressure 36.5", fuel
> flow 195-220 pounds 
> per hour
> Climb (100%), 2500 rpm, manifold pressure 30", fuel
> flow 120 pph
> Cruise, 2300 rpm, mp 30", ff  82-85 pph
> 
> I realize that normalized that your mp will not
> exceed 30", 2500/30 is 
> 100% for my engine.
> 
> These are some data points that may or may not help.
> The 550 may be 
> totally different...
> 
> Joel
> 
> RICHARD J VANDERSTEEN wrote:
> 
> >Any body have any idea about excessive oil
> overboard
> >crankcase vent?
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Full power 2700RPM 29"MP 28GPH, cruse 2450RPM 25.5MP
14.2GPH.  The IO550N has only 8 qt pan so I have been
flying it between 8 and 7, 6.5 min.  Thinking about
air oil separator.  Does anybody have Tony Bingelis's
design?  I will lose 1 qt in 2 hour flight and have
not tested whether it would slow down at that point.