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David Carter wrote:
I like dyno data for engine performance, but a "cooling SYSTEM" can't be
simulated unless you put the dyno in a NASA wind tunnel and replicate the
two main stages of flight - takeoff and climb at full throttle (need
everything right for that speed) and cruise (don't need much coolant flow or
pump) - - - and WOT top speed (for us racers or racer wunnabe's)
David
And a dyno won't tell you how the engine will perform in a race car as it is subject to high G side loads.
A dynometer is not for testing an entire system. It's a way to conviently isolate parts of the system so that one part at a time can be optimized. It's impossible to engineer ANYTHING with different sections changing all over the place at the same time.
The question Rusty stated was, "what effect does water flow have in a real engine?" You can't reliably answer this question in flight, because everything else is changing around it. But with a dyno, you install a variable speed water pump that circulates water through a static system (same radiator, engine and fan). With a graph of the results you have some authority to state that reducing/increasing the flow will have such-n-such an effect. If you increase/reduce the flow, you will have to compensate for the *effect* elsewhere.
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