Paul

It seems your pump fits my criteria for a central inlet. That is good news.
To clarify our discussion I've included a picture of Ed's modified pump fit
on the block for comparison with your remote design.

Your design eliminates the abrupt and torturous route the water must travel
and that alone will improve the pumping rate.  I also see you have tested it
using your end mill set up. Am I correct in guessing you use the standard
Mazda impeller?

The design structurally looks very good.  If it is a better performer than a
modified Mazda pump I am definitely interested in purchasing one. I
understand it still only a casting and needs some machining to finish it.

DougFir

The pictures you attached are my pictures? Ed who? :)

Straight in inlets are definitely more efficient than
the Mazda style right angle input. I notice Jim Mederer modified
the KSE pump for a straight in inlet. If you butcher
the stock 2nd gen 13B pump correctly you can add a straight
in inlet. Cut away everything inside the red line and weld
in a straight hose barb represented by the blue circle.
You now have a remote pump. Half the stock pump is merely
a glorified hose barb for the water coming out of the block.

Yes my remote pump uses a stock Mazda 2nd gen replacement cartridge.

-- 
Paul Lamar ...No rotor no motor.

I have two that are incorrectly machined. The taper that clears
the stock impeller was machined too deep into the casting.
You can fix it by taking a fly cut on the cartridge mounting
surface. I also have one input barb that you will need to tig
weld to the pump housing. You will also have to make an
output hose barb on the lathe and tig weld it one as I am out
of output hose barbs. A 10 minute job on the lathe.

BTW I also have a bunch of raw intake casting that might fit
an RX8 engine with some die grinding.

Paul Lamar ...No rotor no motor.

Paul

Some of those pictures were from our resident professional welder Ed
Klepeis. I'll pass on the butchering job for now but try and fix one of your
units that was cut too deep if it less than a mm cut needed.  Output barbs
are no problem.  I am getting ready to have the P-ports machined out of
round stock now. So can  have them done together.

Finally parts are being made.

This time please ship via postal surface mail. Small boxes are less than $15
and they usually arrive in 10 days or two weeks max. FedEX, UPS etc are
outrageous because they tack on other clearance fees on this side of the
pond.

Thanks Paul

What pictures? I got no stinking pictures.
I have not told you the price yet :)

It may be more than a MM. I have not stuffed clay in it yet.
I'll do that shortly. If it is more than a mm you might have
to build it up with welding rod.