Perhaps its time for a new front cover. The best place for the water rad is
turning out to be on the spark plug side of the engine. Unfortunately that
complicates the pluming somewhat because the water pump inlet and outlet are
on the other side of the engine. Perhaps we should take a page out of the RX8
design and make a new front cover incorporating the water pump housing with
the water coming out and going in  on the other side of the engine.

Another problem is the pump should be mounted as low as possible so any drop
in water level will not cause the pump to cavitate. We built some remote
pumps a few years ago that used the stock Mazda pump cartridge. One other
point is the pump would be more eff. if the water came stright into the
impeller.  Here are some shots of that remote pump.

I am looking for feed back here. Does anybody else have an ideas they would
like to see incorporated.

Paul Lamar

Paul,
This is a great idea, and after the success with the engine mounting plate (great job Jeff and others!) an elegant solution is in the making!   Just as Paul has his favorite solution (turbocompounding) I also have one, though unproven... This is using a Tesla turbine in place of an impeller.  (I am not able to yet) - If someone has the $$ please order membership and the background info of a NASCAR team testing a Tesla turbine in place of a standard water pump.  See background and order info at http://www.teslaengine.org/main.html  A good short video http://www.youtube.com/watch?v=9PdzaYwgQBE
Dan F