Water pump setup questions

Problem solved

After a particularly hot drive, I had had enough, so I shotgunned the problem. It is now fixed but I don’t know exactly what the cause was.


The changes:
I reduced the water pump to crank ratio from 1.3:1 to 1.1. This is what I think solved it, getting me out of cavitation. I could be wrong, and I don’t know for sure.

I also put a new thermostat in it for good measure, though the old one seemed to work. Both standard type thermostats.

I also changed out my clutch fan for a fixed 7 blade. There is almost no way this made a difference at speed, but I felt like it was potentially good insurance if I was to overheat and then slow down into stop and go.


Took it out for some city driving and it stayed around the 187-190 range. Then drove across the city, 24 miles at 75 mph. Never went a degree over 190.