> > > BTW one HP is 746 watts. At 14 volts with the alternator running

that is 53 amps. In theory it does not take much HP to pump water
at this flow rate and pressure. This is a stock Mazda
13B water pump. Any reduction in this flow rate

risks

damaging the engine.


Paul Lamar

One of the things that will be interesting Paul is if you can 
drive the pump to cavitation. Knowing when the stock pumps cavitate 
can help pulley selection. The number I have heard is approximatly 
7500 pump RPM but that is heresay. Lynn may have seen examples using 
high RPM in the race engines. Those racing applications often use a 
larger/slower pulley to prevent overspeeding the pump. If we got GPM and 
cavitation RPM we would know if we should all be ordering those KSE waterpumps! 
Or Paul's next cut on the centerfeed stocker, if that might still happen. Bill Jepson

I doubt we will be able to get much over 6500 RPM with out blowing
the circuit breakers. Also that motor is 3600 RPM and the eight
inch pulley will give us only about 7000 RPM max if the breakers
don't blow.

After we fool with the pump dyno a bit more I will put the flow
meter in the test engine cooling system and see what kind of actual
flow we are getting in the complete system with the stock Mazda pump.
 
Paul Lamar
 
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