----- Original Message -----
Sent: Monday, December 08, 2003 2:20
PM
Subject: [FlyRotary] EC2 MAP Table
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
Absolutely outstanding, Perry.
There is no doubt that my Ec2
map looks the same or worst, it would be really great to get the program from
you and which Ec2 wire you hook it to to get your readings (I assume its the
data output wire).
I can run it on my laptop and take a look at
it. So I definitedly would like a copy of the software.
Ed Anderson
RV-6A N494BW Rotary Powered
Matthews, NC