Installed water pump and 160 thermostat today

[teleski]

This is absolutely right. The thermostat controls the lower temperature of the engine when the radiator cooling capacity is sufficient to keep it there. What I didn't quite appreciate is that the steady state temperature is about 15degs higher than the marked stat temp, which means it is already starting to close at 15-20 deg above marked, and regulating the flow. What no one is pointing out here is that the high temperature of the engine is regulated by the cycling of the cooling fans when the air flow is not sufficient.

For me, I am often not driving at a steady fast clip, LA traffic, city streets etc, so I would only really see the benefit of a lowT stat when cruising on the highway. I assume this situation to be true for many folks.

Out of curiosity, when pushing one of these cars on a track, > 100mph, (never done it) do you see elevated temperatures, or is there enough airflow to keep it pegged at the stat determined temperature?

[shadrach74]

Originally Posted by teleski

This is absolutely right. The thermostat controls the lower temperature of the engine when the radiator cooling capacity is sufficient to keep it there. What I didn't quite appreciate is that the steady state temperature is about 15degs higher than the marked stat temp, which means it is already starting to close at 15-20 deg above marked, and regulating the flow. What no one is pointing out here is that the high temperature of the engine is regulated by the cycling of the cooling fans when the air flow is not sufficient.

For me, I am often not driving at a steady fast clip, LA traffic, city streets etc, so I would only really see the benefit of a lowT stat when cruising on the highway. I assume this situation to be true for many folks.

Out of curiosity, when pushing one of these cars on a track, > 100mph, (never done it) do you see elevated temperatures, or is there enough airflow to keep it pegged at the stat determined temperature?

You make my point with the comment "The thermostat controls the lower temperature of the engine." That is its exact function. Most cars normal operating temp is slight above that of the factory installed thermostat. Meaning that it is open under normal driving conditions additional cooling beyond is provided by air over the radiators whether it be from forward motion, or the fans.

If anyone here is suggesting that my stock thermostat does not run wide open during the spring and summer then please tell my fans to stop coming on to cool all the hot water running through the radiator.

High temp thermos are common snake oil sold to the ricer crowd as well. The whole point of the thermo is to minimize warm up time. Lowering the temp that the thermostat opens is counter to that objective. And Homeboy while I truly admire your enthusiasm, you are deluding yourself if you believe it gives you even an inkling of additional power. It will do jack $hit to cool incoming air and have no effect on the combustion event. Do not believe everything that people market to you.

I'll submit it again if anyone can provide instrumented data showing that a stock porsche thermo remains closed while the there is water in the system that is well above 186df, then by all means produce it.

If in fact the steady state temps are in the 215 to 220 range for this vehicle then the issue is with the capacity of the system and no thermostat is going to change that.

A fool and his money...

[JFP in PA]

Originally Posted by shadrach74

I'll submit it again if anyone can provide instrumented data showing that a stock porsche thermo remains closed while the there is water in the system that is well above 186df, then by all means produce it.

If in fact the steady state temps are in the 215 to 220 range for this vehicle then the issue is with the capacity of the system and no thermostat is going to change that.

The OEM stat is rated to start to open at 186F; you can prove it for your self, just take an OEM stat and suspend it in a beaker of water with a thermometer in it, apply heat, and watch what temp it starts to opens at (186F), and what temp it is fully open at, which is much higher.............

The 215F+ running temps are real, try hooking a scanner with PID capability up to the car and take it for a ride, you just might be surprised at how hot it gets....... Then repeat the same test on a car with the 160F stat and see what you get; the "proof is in the pudding"..........