Electric Water Pump questions ...

[Dynomite]

Originally Posted by cvette98pacecar

I have the same setup as Jerry. I drove the car hard for 6 days straight above 5500 RPM for hours on end and had no issues. Ron Davis Radiator, Stock thermostat with 3 small holes drilled to reduce back pressure to keep the antifreeze flowing through the radiator.

I am thinking the radiator allowable pressure is increased with the Ron Davis (structural capacity of the radiator) or the Coolant flow resistance is decreased such that greater Coolant Flow will not contribute to higher radiator pressure. In the case where the Radiator has greater burst pressure capacity it would be time to increase the Return Spring Pressure on the Thermostat dis-allowing some Coolant to return directly to the engine. In the former case where the Coolant Flow Resistance is decreased through the Radiator, nothing would have to be done to the thermostat to realize the benefits of the larger capacity radiator.

Ron Davis Radiator w/o transmission cooling

Coolant temperature stays at a constant 185 deg (70 deg F ambient) with 180 deg thermostat.*
a. 1989-1996 C4 Type V8 All Part No. 1-16CV8996
b. Rated 800 Hp
c. Manual transmission
* Coolant Temperatures will climb a bit with AC on (100 deg F ambient).