"Bass, Jerry" wrote:

The inlet ducts expand as they go towards the face of the Radiator.

Not as

smooth as your 109 drawing, however.  I did increase the size of the

lower

hole from what you see to 3" dia round.

Jerry Bass

Jerry,

  Is that 3" diameter hole your talking about feeding air to your oil
cooler? Are you using the stock Mazda cooler? And how well is ti working?

Mike Wills

"Bass, Jerry" wrote:

It seems to be.  It is a Stock Mazda Oil cooler which I blocked the bypass
valve to not bypass.  It is slightly uphill from the inlet/outlet and may
circulate the oil through part of the fin area.  I will look at it this week
end as I have to send my engine to Turintine.  The Water coolers are as
Tracy Crook described in his book. The Mazda diagram shows hot water coming
out of the top and going back in at the bottom.  I took one side, Starboard,
to the pans copper tube that Tracy describes, then to the bottom of the
cooler.  And the Port side to the top of the cooler from the hot side of the
engine. Both coolers have end (side) tanks. Should I move the hose from the
Starboard cooler to the top?

I was going to take pix, but got sidetracked.

The new 3" dia hole I enlarged at the old Carburetor inlet, goes updraft to
the oil cooler.  Some say the updraft may not be as efficient as direct
input.  I will see if I can re-arrange the oil cooler and perhaps enlarge
the other two air inlets.  I could get almost 6" dia on each side.

Jerry Bass

 
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