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There was a rash of Subaru engine-out events back a
few years ago. Folks were using the auto ECM, it turns out that the auto
manufacture ever mindful of the low state of technical understanding of the
average driver programmed the ECM to shut the engine down if it detected amongst
other things an engine OVER TEMP status. Needless to say, you don't want
an ECM that you are not thoroughly aware of what it is going to do under all
circumstances. Some have a "turn-over sensor" that turns off the fuel pump
if it sense certain parameters have been exceeded, etc, etc.
If you are a whiz at deciperhing the code of the
typical Auto ECM and really understanding what it does - then go for it.
But, for the vast majority of us - we'll keep flying with Tracy's
EC2. Nothing hidden and besides the ECM on autos are generally not
redundant. I first flew with an after market HALTECH EFI - a good system,
but it did fail completely (fortunately I was on the ground when it did).
I was glad to be able to get an EC2 from Tracy with redundancy.
But, then this is experimenting and if your risk
aversion profile says to go for it, then the best of luck. Not that
it can't work, but the work and risk regarding the payoff is on the minus side
of my personal equation.
Best Regards
Ed
----- Original Message -----
Sent: Wednesday, February 09, 2005 10:04
PM
Subject: [FlyRotary] Re: Microtech EFI
and Tuning
Dale you have got to be kidding?!
I think a brief survey
will show that the vast majority is flying Tracy's EC.
Doesn't the car
EC shut down the engine if it doesn't like what it senses?
Not a good thing
in the air!
Finn
Paul,
You've
just made a very good case for going back to the
stock ECM. How many
aircraft are _flying_ on the MicroTech
controller? How many are flying on
Tracy's controller?
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