Perry Casson wrote:

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
http://eaa154.dhs.org/perry

 
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