For the new guys, the 'front' (front as in the auto) oil pressure regulator protects the oil cooler and hoses from overpressure.  A positive displacement pump/oil pump can create some pretty impressive pressures.

Ken Powell


>
> ----- Original Message -----
> From: "Bulent Aliev" <atlasyts@bellsouth.net>
> To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
> Sent: Saturday, June 19, 2004 11:23 PM
> Subject: [FlyRotary] Re: Oil press. control valve
>
>
> > On 6/19/04 11:03 PM, "Ed Anderson" <eanderson@carolina.rr.com> wrote:
> >
> > > Bulent,
> > >
> > >   There is a control valve next to the oil pump and a pressure regulator
> > > on the Rear housing (I think that is how they are referred to).  The
> control
> > > valve is a sort of safety feature set for approx 156 psi so should you
> plug
> > > your oil line you don't blow the line.  The Pressure control valve
> generally
> > > dumps oil to relieve pressure around 70-90 psi (depending on which one
> you
> > > have and/or whether you have shimmed it for increased pressure).
> > >
> > > The only thing I can think of is if you wanted more oil pressure, folks
> have
> > > shimmed the pressure regulator with some spacers - but, I would probably
> not
> > > do that as it works the pump harder.
> > >
> > > Ed
> > >
> >
> > It is the one close to the oil pump. The other one was shimmed as per
> > Tracy's instructions from about 4 years ago.
> > bulent
> >
> >
> In that case, I have not heard of any modifications needed or necessary for
> that one.  Of course, you do need to find the spring and ball for it.  What
> is the status of your project, Bulent.
>
> Ed
>
>
>
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