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To try diagnosing a "runs rough at certain throttle
settings" problem on my plane I wrote a little windows application that can talk
to Tracy's EC2 and display real-time parameters plus upload/download the MAP
table to my laptop. Here's a spreadsheet of the resulting
high and low speed MAP Tables. No wonder there are some rough
spots, after seeing this I'm surprised the engine runs as well as it
does. I'm finding fixing rough spots hard to do from EC2 panel being as
soon as the engine hits a rough spot the manifold pressure changes and it hops
over to a good MAP value. Why the table looks as wild as it does is a
mystery to me but the general trend to lean from default at low manifold
pressure and richen the mixture a bit at high power is correct. I'm going
to try smoothing these numbers by hand and uploading something that looks a bit
more sane.
This software
(EC2Params.exe) and instructions on how to connect a laptop to a
EC2 will be posted after I clean things up a bit. Perhaps I'll
port it to PocketPC as well if there is interest.
Perry Casson
Glastar/13B
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