Hi Paul;
       Fist of all I'm for the manufacturing of a new
pump housing in lew of reworking the Mazda pump. I'm
also hoping that there will be enough of us interested
so that we can have a CNC shop make up a batch.

But I also understand the need of those who want to be
able to rework the stock Mazda unit if the height is not
a problem........so my comments:
 -To cut the top of the pump is no problem.
 -The removal of the existing wall/divider can be
accomplished by the careful use of a Dremel or any small
grinder equipped with the proper burrs etc.
 -The problem is welding the new divider in for most..so
  why weld it? Why not make the divider thicker say .250
  and screw it in place using 8-32 c'sunk f/h screws,
  from the rear of the pump and from under the impeller,
  then use the appropriate epoxy to seal the perimeter of
  the plate and also the heads of the screws. Bearing
  in mind that if the epoxy should fail it would allow
  minute bypass of flow.
This I believe is doable.....Hope this helps the stew.

                                 Butch Diaz Sr.

Yes that sounds doable. I have thought about the epoxy. I bought
some JB weld that claims it is good up to 600 F. I was worried
that after I epoxy in the partition and I welded on the new
tube (See below) it would melt the epoxy. I am about at that stage
as we speak. I am considering first welding on a flange where
the output tubes goes, welding a mating flange on the output tube
and then putting in the new partition with epoxy.

I butchered off the stock filler neck and cap to weld on to the new
tube  because it was so cute, little o-ring and all :-)

Paul Lamar
 
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