Here is a comparison between the Mazda water pump and the Toyota water pump that Don Dunbar had found.
It is also a lot lighter.
It rotates the same direction as the engine and comes with a 5 rib pulley
...Chrissi

www.CozyGirrrl.com
Cozy Mk-IV RG 13B-turbo
Plans #957 Chapter? big pieces done, details, details

Looks like it would pump less water but on the other hand you might be able
to run it faster. The RX8 cartridge is aluminum like the Toyota and a lot
lighter than the 2nd gen cast iron cartridge shown. A problem
with the Toyota is the right angle turn in the output. Frankly I would
have to run the test using the same test rig to draw any meaningful
conclusions over one being better than the other. Not that it matters
much. I am sure they are not that far apart. I also don't see any means
of adjusting the belt tension on the Toyota by pivoting the pump.

Paul Lamar
 
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