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?

Paul and group,
The Oil line size is not a big deal unless you have a system that could require
full flow. That woouldn't be common in a semi-closed loop system like our engines.
The biggest problem with different sized lines is the area where the line steps up
or down. The step area can cause cavitation at high flow, and foaming of the fluid.
Sometimes the diameter difference camn be used to your advantage like in a cooler
where you want slower flow for heat transfer. Bill Jepson

Speaking of stepping down the usual dash ten used for oil cooler plumbing
steps down from .5 inch ID to .4 inch ID. That cannot help the flow :)
I think I am going to dash 8 everywhere. Dash 8 is a better match with
the 10 mm oil passages in the engine. Further more it is easier to route
dash 8.

Paul Lamar

The only reason I used -10 was because Mazdatrix sells the metric to AN
in that size. Is there a source for metric to AN-8 adaptors?

--
Perry Mick
http://www.ductedfan.com

Yes I think Deering Industries can fix you right up.
(562) 595 1668

You will need the dia and pitch of the threads in the oil cooler and
the block. There are three big ones and one smaller one. The big one 
looks like 18 mm 1.5 mm thread pitch.
The smaller one looks like 16 mm dia. by 1.5 mm thread pitch.
I am not sure which one goes where right at the moment.
I'll check.

OK I checked. One 18 mm goes in the back end housing. The
16 mm screws into the aluminum front cover oil outlet
from the pump. The other two 18 mm must screw into the oil cooler.

Paul Lamar
 
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