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On 09/06/2012 10:12 PM, Cedric Gould wrote:
I think I'd be more interested in seeing these two plots with manifold pressure, rather than throttle position, plotted (same data).
Here ya' go. The first is the same data set. The second is the data set from a couple hours ago. If you'd like to see more than you'll know what to do with, download MegaLogViewer (it's free), and I'll send you my log and configuration files.
More good news. With an ambient temperature of 79*, I've found the point where my coolant temps max out. Before, the temps just kept climbing and climbing. Today, if I held between 2500 and 3000 RPM, the temps would slowly start backing down from 205*. At idle (~1300RPM), the temps would start inching up again. My oil temps maxed out at 203*, and slowly started backing down off that at idle.
I surmise that there just isn't enough airflow through the oil and water cooler with the prop spinning that slowly. Both are located about 8ft behind the prop. I would expect to get much better numbers if the plane were actually moving. I'm going to test it out by attaching a leaf blower to the exit of one water coolers this evening. I've measured the exit velocity of the air from the blower's 3" exit at 45mph. If that, working on only half the radiator capacity, keeps the temps under 200*, then I think I can feel safe that it will cool on takeoff (minimum of 60mph).
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