> > Ken Welter wrote:

 > >
 > >   This is a trick that Rob Golden at Pineapple racing turned me

on to.

 > > He did dyno testing and found 15 degree drop in oil temp

measured

 > > before the cooler by doing this, you drill out the plug in the

side

 > > of the front housing and tap it to take the oil strait out of

the oil

 > > pump to eliminate all the small oil passages and 90 degree bends

in

 > > the front cover also do away with the banjo on the return line

in the

 > > rear housing and put it strait in a banjo is twice as

restrictive as

 > > a 90 degree bend so tap out the oil cooler and run it strait out
 > > there to if possible if not run a 90 instead of the banjo.
 >
 > Ken shorter sentences please. Thanks.
 >
 > Paul Lamar

 Sounds great if it drops oil temp by 15F.  I wonder whether it might

lower

 oil flow to things like the injector oil pump - not a problem if you

don't

 use one, I suppose.  Since the oil pump housing oils the chain - no

problem

 there.  Does this mean the infamous front cover "O" ring problem

will no

 longer be a problem?  Will the oil pressure controller valve still

function?

 I presume if the engine lives under racing conditions then the mod

does not

 have an adverse side effects.

 Ed Anderson

>From this it looks like the oil metering pump gets oil from the top

oil gallery.

Paul Lamar

  From Ken Welter
  I have been just plugging the outlet on the front cover but beings I
am not using the injector I was considering plugging the galley at
the o ring but that would eliminate the pressure control valve, any
thoughts on how important that valve is.

You don't suppose doing away with the pressure control valve caused
Chuck Harberts oil cooler to fail  and caused his in-flight fire do you?
I don't know if he made... or had it made or not. Still sounds scary.
Mazda put it in there for a reason.

Paul Lamar

I was told (at some point) that the reason for the Oil controller valve
(which releases at around 150psi) was to provide a safety release should the
oil cooler or filter be clogged and prevent those components from bursting
under the resulting high oil pressure.  The normal oil pressure regulator is
for the routine regulation of oil pressure under normal conditions.

Ed Anderson

We need to devise a pressure test where we can check the operation of that
valve. I think we can plug tap a front cover right where the problem O-ring
is normally located. Pump it up with a hand hydraulic pump through 
the oil cooler outlet fitting on the front of the cover. Then measure 
the point where the spring releases the pressure increase.

Paul Lamar
 
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