>>  Hi Paul,
 >>  Thanks for the analysis on the oil gallery size.  Wouldn't the larger
 >>  -10 hose have lower pressure loses than -8 hose?  Is it enough to
 >>  matter?  Are you keeping the oil pressure regulator that mounts to the
 >>  bottom of the front cover?  If so, the front cover/front side housing
 >>  oring seal and passage has to remain so that the regulator can 'do it
 >>  thing' between the oil pump and the oil cooler.  In this case the front
 >>  cover hose outlet hole has to be plugged as well.
 >>
 >>  Ken Powell

 >Yes but I am willing to bet it would only be a few psi.
 >
 >Good point on the oil pressure regulator. Actually what it is
 >is a oil pressure limiter and it is set to 150 psi or so.
 >The real oil pressure regulator is mounted near the bottom
 >of the rear end housing and is set to 80 psi or there abouts.
 >
 >If you always use 15W 50 multi viscosity oil and never try to
 >start your engine after it sits outside in below zero (F not C)
 >weather it should be unnecessary in an aircraft engine.
 >
 >For one thing we don't zing the engine. The prop load will see to
 >that. If you zing a cold engine with thick oil without the oil
 >pressure limiter you could shear the oil pump shaft.
 >
 >Paul Lamar

    I blocked off the rear pressure relief valve and made an external
 so that I can adjust if needed.

 Also for real cold weather I have a bypass line with coupling that I

 > can put a pill in to plug the line or put pills with different size

 holes in them depending on the air temp as I fly in temps down to 30
 below zero, hard for you   guys down south to believe.

 Had a throttle cable freeze wide open at 16,000 ft once and the only
 way down was to shut the engine down and glide down to the Columbia
 river where it was 35  degrees and let it thaw.

   Ken

I think the rear is called the pressure regulator and the front is
the pressure relief
or limiter. We need to get our nomenclature standardized :)

Paul Lamar

   Ok the front one I left stock and the rear is the one I blocked and
replaced with an external valve, when I get to the airport I will
shoot a photo of it.

  Ken

I have a picture but I can always use another one. Here is the one I have.
I am not sure how this works however. What are we looking at here?

Paul Lamar
 
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