Paul,

 With an eye toward improving the cooling on my p-port 20B, I ordered one
 of these custom water pumps from Mazmart yesterday. They claim it will
 not cavitate up to 10,000 rpm. So, it should be well within the
 operating limits at 6000 - 7000 rpm. This looks even nicer than the 20B
 impeller.

 Mark

 P.S. They will give a discount for group buys of 10 or more.

 ------------------------------------------------------------
 Great news Mark. I assume this is the RX8 version. Do they have
 a 13B version. http://www.mazmart.com/

 Do you have the exact link? Is it a new RX8 part or a used
 RX8 part. I can't find it on the site?

 When the continuous power goes up the heating requirements
 on the rotor housings also go up. It is a good idea to install
 a rotor housing thermocouple. Similar to a cylinder head
 temperature gage. You want to keep the temperature of the aluminum
 under 500 F.

 The old 13B water pump had a better rotor than the
 new RX8 water pump.

 Is your engine back together? Let us know
 what the rotor housing thermocouple says.

 Paul Lamar

Paul,

Yes, it looks like Mazmart does make a water pump for the 93-95 RX-7.
These are new pumps, not rebuilt. The link
is http://www.mazmart.com/newpartscarlist.aspx

No, my engine isn't back together yet. I plan on doing that right after
Christmas.

Mark

Did they mention what the quantity discount would be.  If it is worth
it, are there 9 other souls that are interested???

Rich