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Originally Posted by nemo
Why would you limit the ability of the temperature sensor to control pump speed. If the sensor indicated a high temperature that alone should be able to adjust the pump to any speed required.(high temp reading light load)
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The main reason to limit the pump speed is cavitation. If I spin the pump too fast, it'll cavitate. I don't really know how fast it'll take to cavitate. That is one of the things I asked earlier, and hopefully I'll be able to figure that out in testing. Then, I can set the temperature variable from 0 to that speed. But, I ideally want just enough flow to cool the engine when it is the hottest and under the highest load. Anything more is wasted energy.
This mod will be done after an alternator delete is done, so I do have a limited supply of energy to run the pump. I might as well make the best use of it. If that takes a few lines of code, that is a tiny price to pay.
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I find it interesting you are considering load at all. Not saying it's a bad idea. Is this to obtain a more stable temperature? As long at there is sufficient flow to the temperature sensor it should respond indirectly to the load.
One other parameter you may want to add if you use load, load having little or no effect below a specified temperature.
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Yes, its mainly for a more stable engine/head temperature, aka elimination of any hot spots. The idea behind the load variable is heat in has to equal heat out. Increased load means increased heat into the coolant. Extra pump speed should assist in that faster than the temp sensor, and reduce the risk of pinging/knock. Perhaps this only means running the pump 10% faster, but that might be enough to reduce hot spots that cause issues. If I had a knock sensor, I'd probably monitor that too.
I'm no water pump expert, perhaps it is way overkill, but those are my thoughts.
