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WARNING: Reading this graph, keep in
mind that the MAP is measured in kPa. It's that whole "metric"
thing that the MegaSquirt uses. Either mentally look at it as a
percentage of ambient air pressure, or divide it by 3 to get close
to what Hg" would be. Not exact, but definitely be aware that I'm
not running 70lbs of boost 8*)
On 09/07/2012 10:21 AM, Ernest Chrisltey wrote:
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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